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Article
pubs.acs.org/JAFC
Analysis of Lipophilic and Hydrophilic Bioactive Compounds Content
2 in Sea Buckthorn (Hippophae ̈ rhamnoides L.) Berries
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Mirosława Teleszko,† Aneta Wojdyło,*,† Magdalena Rudzińska,‡ Jan Oszmiański,† and Tomasz Golis§
†
Department of Fruit and Vegetable Technology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37 Street,
51 630 Wrocław, Poland,
‡
Institute of Food Technology of Plant Origin, Poznań University of Life Sciences, Wojska Polskiego 31 Street, 60 624 Poznań,
Poland
§
Department of Pomology, Gene Resources and Nurseries, Research Institute of Horticulture, Konstytucji 3 Maja 1/3 Street, 96-100
Skierniewice, Poland,
ABSTRACT: The aim of this study was to determine selected phytochemicals in berries of eight sea buckthorn (Hippophaë
rhamnoides subsp. mongolica) cultivars, including lipophilic and hydrophilic compounds. In the experiment chromatographic
analyses, GC (phytosterols and fatty acids), UPLC-PDA-FL, LC-MS (polyphenols), and HPLC (L-ascorbic acid), as well
spectrophotometric method (total carotenoids) were used. The lipid fraction isolated from whole fruit contained 14 phytosterols
(major compounds β-sitosterol > 24-methylenecykloartanol > squalene) and 11 fatty acids in the order MUFAs > SFAs >
PUFAs. Carotenoids occurred in concentrations between 6.19 and 23.91 mg/100 g fresh weight (fw) (p < 0.05). The major
polyphenol group identified in berries was flavonols (mean content of 311.55 mg/100 g fw), with the structures of isorhamnetin
(six compounds), quercetin (four compounds), and kaempferol (one compound) glycosides. Examined sea buckthorn cultivars
were characterized also by a high content of L-ascorbic acid in a range from 52.86 to 130.97 mg/100 g fw (p < 0.05).
KEYWORDS: sea buckthorn, bioactive compounds, fatty acids, phytosterols, polyphenols
(58 registered cultivars in 2003), where H. rhamnoides subsp.
mongolica dominates. Worldwide >150 sea buckthorn cultivars
from Russia, Ukraine, Belarus, Germany, Finland, China, and
Azerbaijan are known.6
In H. rhamnoides extensive variations in chemical composition have been revealed among populations, subspecies, or
cultivars. For example, according to Kallio et al.7 wild berries of
subsp. sinensis, native to China, contained 5−10 times more
vitamin C in the juice fraction than the berries of subsp.
rhamnoides from Europe and of subsp. mongolica from Russia.
The fruit flesh of subsp. sinensis berries had contents of
tocopherols and tocotrienols 2−3 times higher than those
found in the other two subspecies. Differences in chemical
composition occur also between cultivars of the same
subspecies. The content of ascorbic acid among Russian
cultivars (subsp. mongolica) may range from 0.5 to 3.3 g/kg,8
whereas that in berries of subsp. turkistanica ranged from 2.52
to 4.19 g/kg.9
Cultivar selection of fruit is an important problem from a
food technologists’ point of view, because it allows the choice of
the most valuable raw materials for different processing
directions. As a consequence, the priority in cultivation is to
create varieties adapted to the growing conditions of the region
and suitable for mechanical harvesting, but also with preferred
chemical composition and high content of biologically active
substances.
INTRODUCTION
Sea buckthorn (Hippophaë rhamnoides L.) fruits, called also
seaberry, sanddorn, or Siberian pineapple, are yellow-orange
fleshy, juicy, and soft berries with 6−9 mm diameters. In
Europe H. rhamnoides bushes occur along the North Sea, Baltic
Sea, and the Atlantic coast of Norway. The wild form grows
also in Central Asia from China through Mongolia and Siberia,
eastern Afghanistan (mountain areas), and eastern Uzbekistan.1
Compared to other fruits, sea buckthorn is characterized by the
unique composition of bioactive components. It is a rich source
of vitamins (C, A, E, K), minerals (Fe, Mg, Na, Ca), amino
acids, carotenoid pigments, and flavonoids and contains also
plant sterols and fatty acids.2 The most recognizable sea
buckthorn product is oil pressed from the seeds, which contains
omega-3 and omega-6 fatty acids, and the pulp oil characterized
by a high concentration of fatty acids from the omega-7 group.3
Phytosterols are the major constituents of the unsaponifiable
fraction of sea buckthorn oils. The sterol content in different
varieties ranged from 1.3 to 2%, and the major compound is
sitosterol (β-sitosterol).3 The chemical composition of H.
rhamnoides and high content of active compounds affect the
health-promoting values. There is a lot of interesting
information about the pharmacological properties of sea
buckthorn and its products, such as inhibition of platelet
aggregation and antioxidant, antibacterial, antiulcer, antiinflammatory, anticancer, and antihypertensive effects.4
A characteristic feature of Hippophaë is a huge biodiversity.
There are 15 species and subspecies of sea buckthorn, but only
4 subspecies belonging to H. rhamnoides are being used (subsp.
mongolica, subsp. sinesis, subsp. rhamnoides, and subsp.
turkestanica).5 The leader in sea buckthorn breeding is Russia
■
© XXXX American Chemical Society
Received: October 22, 2014
Revised: April 2, 2015
Accepted: April 10, 2015
A
DOI: 10.1021/acs.jafc.5b00564
J. Agric. Food Chem. XXXX, XXX, XXX−XXX
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Article
290 °C. The temperature in the injection system and detector was 300
°C. All samples were analyzed in triplicate. Results were expressed in
micrograms of phytosterols per 100 mL of lipid extract.
Determination of Fatty Acid Composition. Methyl esters of
fatty acids (FAME) were prepared according to AOCS Method Ce 1k07.12 Diluted FAME were separated on a HP 5980 series II (HewlettPackard, Palo Alto, CA, USA) equipped with an Innowax capillary
column (30 m × 0.20 mm × 0.20 μm) and flame ionization detector
(FID). Hydrogen was used as the carrier gas at flow rate of 1.5 mL/
min. The column temperature was programmed from 60 to 200 °C at
12 °C/min, and the final temperature was held for 25 min. Detector
and injector temperatures were set at 250 °C. Fatty acids were
identified by comparison of the retention times with authentic
standards, and the results were reported as weight percentages after
integration and calculation using ChemStation (Agilent Technologies). All samples were analyzed in triplicate. Results were expressed in
percent.
Hydrophilic Compounds Analysis. Analysis of L-Ascorbic
Acid Content. L-Ascorbic acid content analysis was based on the
method previously described by Oszmiański and Wojdyło.13 Seedless
berries (ca. 5 g) were mixed with 50 mL of 0.1 M phosphoric acid and
centrifuged at 14000g for 10 min at 4 °C. The estimation of L-ascorbic
acid was carried out on the Waters liquid chromatograph with a
tunable absorbance detector (Waters 486) and a quaternary pump
with a Waters 600 Controller apparatus (Waters Associates). A 20 μL
sample was injected into a Chromolith Performance RP-18e column
(100 mm × 9 mm × 4.6 mm) (Merck). The elution was carried out
using 0.1 M phosphoric acid, and the flow rate was 1 mL/ min. The
absorbance was monitored at 254 nm. L-Ascorbic acid was identified
by comparison with the standard. The calibration curve was prepared
by plotting different concentrations of the standard versus the area
measurements in HPLC. All samples were analyzed in triplicate.
Results were expressed in milligrams per 100 g of fw of fruits.
Sample Preparation for Polyphenols Content Analysis.
Extracts were prepared by mixing of 2 g of berries, 10 mL of HPLC
grade methanol (30 mL/100 mL) with ascorbic acid (2 g/100 mL)
and acetic acid (1 mL/100 mL), and 10 mL of hexane. Samples were
sonicated for 15 min (Sonic 6D Polsonic, Warszawa, Poland), placed
for 24 h at 4 °C, sonicated again for 15 min, and centrifuged (MPW380R, MPW Med. Instruments, Warszawa, Poland) for 10 min
(20000g at 4 °C). The hexane layer was removed. The methanol layer
was purified with Merck Samplicity Filtration System (Merck
Millipore, Ireland) and collected in 10 mL PE vials.
Determination of Polyphenols by UPLC Coupled to PDA
and FL Detector. Conditions of quantitative polyphenols determination were previously described by Wojdyło et al.14 Analysis was
carried out on a UPLC system Acquity (Waters Corp., Milford, MA,
USA) with a binary solvent manager, sample manager, PDA, and
fluorescence detector (FL) (model λe). For chromatographic data
collection and chromatograms integration Empower 3 software was
used. The UPLC analyses were performed on a BEH Shield C18
analytical column (2.1 mm × 50 mm × 1.7 μm). The flow rate was
0.42 mL/min. A partial loop injection mode with a needle overfill was
set up, enabling 5 μL injection volumes when a 10 μL injection loop
was used. Acetonitrile (100%) was used as a strong wash solvent and
acetonitrile in water (10%. v/v) as a weak wash solvent. Two milliliters
of fruit extracts was centrifuged for 10 min at 15000g at 4 °C. The
analytical column was kept at 30 °C by column oven, whereas the
samples were kept at 4 °C. The mobile phase was composed of solvent
A (4.5% formic acid) and solvent B (acetonitrile). Elution was as
follows: 0−5 min, linear gradient from 1 to 25% B; 5.0−6.5 min, linear
gradient from 25 to 100%; 6.5−7.5 min, column washing; and
reconditioning for 0.5 min. PDA spectra were measured over the
wavelength range of 200−600 nm in steps of 2 nm. The runs were
monitored at the following wavelengths: flavan-3-ols at 280 nm,
hydroxycinnamates at 320 nm, and flavonol glycosides at 360 nm.
Retention times (tR) and spectra were compared with those of pure
standards. Calibration curves at concentrations ranging from 0.05 to 5
mg/mL (r2 = 0.9998) were made from (−)-epicatechin, (+)-catechin,
Therefore, the present study has focused on the profile and
content of bioactive lipophilic (carotenoids, phytosterols, fatty
acids) and hydrophilic compounds (L-ascorbic acid, polyphenols) in chosen cultivated berries of Hippophaë rhamnoides
subsp. mongolica.
■
MATERIALS AND METHODS
Reagents and Chemicals. Quercetin glycosides (3-O-glucoside,
3-O-galactoside, 3-O-rhamnoside, 3-O- rutinoside), kaempferol glycosides (3-O-glucoside, 3-O- rutinoside), isorhamnetin glycosides (3-Oglucoside, 3-O-rutinoside), p-coumaric acid, (+)-catechin, (−)-epicatechin, and procyanidins B1 and B2 were purchased from
Extrasynthese (Lyon Nord, France). Acetic acid, phloroglucinol,
methanol, sterol standards, and Sylon BTZ were purchased from
Sigma-Aldrich (Steinheim, Germany, and St. Louis, MO, USA).
Acetonitrile for UPLC (gradient grade) and ascorbic acid were from
Merck (Darmstadt, Germany). UPLC grade water, prepared by using
an HLP SMART 1000s system (Hydrolab, Gdańsk, Poland), was
additionally filtered through a 0.22 μm membrane filter immediately
before use.
Plant Material and Atmospheric Conditions in Harvesting
Season. Ripe berries of eight Russian sea buckthorn (H. rhamnoides
subsp. mongolica) cultivars (cv.), ‘Aromatnaja’, ‘Avgustinka’, ‘Botaniczeskaja’, ‘Botaniczeskaja Ljubitelskaja’, ‘Luczistaja’, ‘Moskwiczanka’,
‘Podarok Sadu’, and ‘Porożrachnaja’, were collected from the Institute
of Horticulture in Skierniewice, Lodz province, Poland (51.59° N,
20.139° E) in September 2011. Manual harvesting fruits were picked,
rinsed, and stored at −20 °C until analysis.
According to data from the meteorological station in Lodz, the
average temperature in 2011 was 9 °C with total annual precipitation
of 483 mm, insolation of 1966 h, and 5.1 octants of average cloudiness.
Lipophilic Compounds Analysis. Determination of Total
Carotenoids Content. The content of total carotenoids in fruits was
determined according to the spectrophotometric method described in
Polish Standard (PN-90/A-75101/12: Fruits and vegetables preserves.
Preparation of samples and physicochemical test methods. Determination
of total carotenoids and β-carotene).10 All samples were analyzed in
triplicate. Results were expressed in milligrams per 100 g of fresh
weight (fw).
Sample Preparation of Phytosterols and Fatty Acids
Content Analysis. Whole fruit pulp (±20 g) was quenched with
100 mL of a chloroform and methanol mixture (2:1) with the addition
of BHT (0.1%), shaken in a separating funnel for 10 min, and allowed
to separate. After phase separation, the extraction mixture was three
times shaken in a separatory funnel with the addition of water. The
chloroform layer was collected, centrifuged for 10 min at 15000g
(MPW-380R, MPW Med. Instruments, Warszawa, Poland), and
filtered through anhydrous sulfate(VI). The extracts were concentrated
on a rotary evaporator (Rotavapor R-215, Büchi, Flawil, Switzerland)
to 50% of the original volume.
Phytosterols Content Analysis. Sterol content and composition
were determined according to AOCS Ch 6-91.11 Fifty milligrams of
extract (the procedure described above) with 100 mg of 5αcholestanol as an internal standard were saponified with 2 mL of 1
mol of KOH in methanol, mixed, and placed for 18 h in the dark.
Then 2 mL of distilled water and 5 mL of methyl tert-butyl ether
(MTBE)/hexane (1:1, v/v) were added to extract the nonsaponifiable
phase. The upper layer was transferred to a test tube, and the residue
was washed twice by the addition of 3 and 2 mL of a mixture of
MTBE/hexane. The solvent collected in the tube was evaporated to
dryness under a nitrogen stream. Sterols were silylated with Sylon BTZ
reagent for 4 h at 20 °C.
Chromatographic separation was performed on a Hewlett-Packard
6890 equipped with flame ionization detector (FID) and a capillary
column DB-35 ms, 30 mm × 0.25 mm × 0.25 μm, in 30 min. The
analysis was carried out without a split, and the temperature at the
time of separation was programmed. In the initial phase (5 min) the
temperature was 100 °C and then increased at 25 °C/min to 250 °C,
which was maintained for 1 min and then increased at 3 °C/min to
B
DOI: 10.1021/acs.jafc.5b00564
J. Agric. Food Chem. XXXX, XXX, XXX−XXX
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Article
Figure 1. Total carotenoids content (mg/100 g fw) in berries of eight sea buckthorn cultivars.
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procyanidin B1, p-coumaric acid, quercetin, isorhamnetin, and
kaempferol 3-O-glucoside as standards.
All samples were analyzed in triplicate. Results were presented as
total flavan-3-ols, hydroxycinnamates, and flavonol glycosides content
and expressed in milligrams per 100 g of fw of fruits.
Analysis of Proanthocyanidins by Phloroglucinolysis. Polymeric proanthocyanidins content were determined in freeze-dried sea
buckthorn berries (Alpha 1-4 LSC; Martin Christ GmbH, Osterode
am Harz, Germany) according to a method described by Wojdyło et
al.14 Parameters of freeze-drying process were as follows: 18 h (time),
0.960 mbar (vacuum), 26 °C (shelf temperature). A 0.5 g portion of
lyophilized seedless fruits was placed into 2 mL Eppendorf vials and
mixed with 0.8 mL of methanolic solution containing phloroglucinol
(75 g/L) and ascorbic acid (15 g/L) and then with 0.4 mL of
methanol with HCl addition in a dose of 0.3 mol/L. The vials with
reaction mixture were closed and incubated for 30 min at 50 °C with
all time-vortexing by thermo shaker (TS-100, Biosan, Riga, Latvia).
The reaction was stopped by placing the vials in an ice bath; 0.5 mL of
the reaction medium was withdrawn and diluted with 0.5 mL of 0.2
mol/L sodium acetate buffer. Next the vials were cooled in ice water
and centrifuged immediately at 20000g for 10 min at 4 °C. The
temperatures in the column oven and sample manager were 15 and 4
°C, respectively. The mobile phase was composed of solvent A (2.5%
acetic acid) and solvent B (acetonitrile). Elution was as follows: 0−0.6
min, isocratic 2% B; 0.6−2.17 min, linear gradient from 2 to 3% B;
2.17− 3.22 min, linear gradient from 3 to 10% B; 3.22−5.00 min,
linear gradient from 10 to 15% B; 5.00−6.00 min, column washing and
reconditioning for 1.50 min. The fluorescence detection was recorded
at an excitation wavelength of 278 nm and an emission wavelength of
360 nm. The calibration curves, which were based on peak area, were
established using (+)-catechin, (−)-epicatechin, and procyanidin B1
after phloroglucinol reaction as (+)-catechin and (−)-epicatechinphloroglucinol adduct standards. The results were calculated as
milligrams per 100 g of fw of fruits.
Identification of Polyphenols by the Ultraperformance
Liquid Chromatography−Mass Spectrometry (UPLC-MS)
Method. The method was previously described by Wojdyło et al.14
Half a gram of freeze-dried powdered fruit (parameters of freezedrying process described in the previous section) was extracted twice
with 15 mL of 80% acetone acidified with 1% acetic acid. The extracts
were sonicated for 15 min, centrifuged at 19000g for 10 min at 4 °C,
and concentrated on a vacuum rotary evaporator to a volume of ca. 3
mL. The samples were applied to the Sep-Pak C18 cartridge (Waters,
Milford, MA, USA) containing 1 g of the carrier, washed with distilled
water to remove the sugar and organic acid (extract = 0 °Brix), and
then collected into a vacuum flask with 15 mL of 80% methanol
acidified with 1% HCl. The methanol extract was evaporated to
dryness. The dry residue was dissolved in 4 mL of 4.5% formic acid,
centrifuged for 5 min at 15000g, and then given to the analysis.
Identification of sea buckthorn polyphenols was carried out using an
ACQUITY Ultra Performance LC system (UPLC) with binary solvent
manager (Waters, Milford, MA, USA) and a Micromass Q-Tof Micro
mass spectrometer (Waters, Manchester, UK) equipped with an
electrospray ionization (ESI) source operating in negative mode. For
instrument control data acquisition and processing MassLynxTM
software (version 4.1) was used. Separations of individual polyphenols
were carried out using a UPLC BEH C18 column (1.7 μm, 2.1 mm ×
50 mm; Waters, Milford, MA, USA) at 30 °C. Samples (10 μL) were
injected and elution completed in 12 min with a sequence of linear
gradients and isocratic flow rates of 0.45 mL/min. The mobile phase
was composed of solvent A (0.1 mL/100 mL formic acid, v/v) and
solvent B (100 mL/100 mL of acetonitrile). The program began with
isocratic elution with 99% A (0−1 min), and then a linear gradient was
used for 12 min, lowering A to 0%; from 12.5 to 13.5 min, the gradient
returned to the initial composition (99% A) and then was held
constant to reequilibrate the column. Analysis was carried out using
full scan, data-dependent MS scanning from m/z 100 to 1000. The
effluent was led directly to an electrospray source with a source block
temperature of 130 °C, desolvation temperature of 350 °C, capillary
voltage of 2.5 kV, and cone voltage of 30 V. Nitrogen was used as a
desolvation gas at flow rate of 300 L/h.
Statistical Analysis. Statistical analysis (variance test and standard
deviation values) was made using Statistica 10.0 (StatSoft, Kraków,
Poland). Significant differences (p ≤ 0.05) between means were
evaluated by one-way ANOVA and Duncan’s multiple-range test.
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RESULTS AND DISCUSSION
Analysis of Lipophilic Bioactive Compounds. Total
Carotenoids Content. In raw material total carotenoids
(Figure 1), phytosterols, and fatty acids content (Tables 1 and
2) were examined.
The sea buckthorn fruits were characterized by a high
concentration of carotenoids, 11.00 mg/100 g fw (mean value).
The content of these compounds in berries was significantly
correlated with cultivar and ranged from 6.19 to 23.91 mg/100
g fw (in ‘Luczistaja’ and ‘Moskwiczanka’, respectively). Similar
values in nine cultivars of sea buckthorn were noted by Kruczek
et al.15 (from 8.85 in ‘Botaniczeskaja Ljubitelskaja’ to 43.06 mg/
100 g fw in ‘Botaniczeskaja’). It also should be emphasized that
the content of these compounds in examined sea buckthorn
fruits was comparable to that determined by Müller16 in
tomatoes, young carrots, and red peppers (12.69, 9.46, and
30.37 mg/100 g of edible part, respectively).
Carotenoids are located mainly in the soft parts of the fruit,
giving them a characteristic orange-yellow color. In sea
buckthorn berries 15−55% of all compounds of this group is
β-carotene. In lower concentrations are also α-, γ-, and
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C
DOI: 10.1021/acs.jafc.5b00564
J. Agric. Food Chem. XXXX, XXX, XXX−XXX
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292 f1t1t2
293 t2
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cultivarsa
AR
AV
BOT
BOT-L
LUC
MOS
PS
POR
squalene
kampesterol
stigmasterol
β-sitosterol
sitostanol
Δ5-avenasterol
α-amyrin
cycloartenol
Δ7-avenasterol
28-methylobtusifoliol
24-methylenecycloartanol
erythrodiol
citrostadienol
friedelan-3-ol
1638.27 ± 25.97 c
167.10 ± 1.25 b
ndb
6145.58 ± 41.11 a
217.29 ± 1.01 b
274.08 ± 4.20 b
314.52 ± 2.82 a
441.78 ± 8.24 b
156.55 ± 0.65c
249.39 ± 0.03 a
1554.42 ± 6.26f
818.75 ± 2.61 a
663.22 ± 1.35 a
737.28 ± 3.28 a
1205.43 ± 0.60 e
139.22 ± 1.62 c
68.22 ± 2.03 a
4942.39 ± 4.91 b
172.64 ± 4.31 c
251.19 ± 4.05 c
110.48 ± 0.15 f
399.89 ± 10.50 c
152.02 ± 3.63 cd
130.10 ± 3.94 d
4048.89 ± 87.92 a
680.91 ± 7.64 b
327.09 ± 8.61 d
583.76 ± 2.16 c
2714.37 ± 7.72 a
201.32 ± 12.67 a
nd
3801.64 ± 10.69 f
217.80 ± 1.57 b
377.56 ± 5.46 a
302.63 ± 13.83 a
462.48 ± 14.82 a
154.63 ± 1.62c
251.85 ± 4.48 a
2711.93 ± 36.19 c
590.29 ± 2.88 c
417.42 ± 1.56 c
606.44 ± 8.35 b
1872.42 ± 106.12 b
95.71 ± 11.57 e
nd
4022.29 ± 47.14 e
110.69 ± 1.19 e
197.21 ± 1.64 d
130.68 ± 2.11 e
439.14 ± 5.54 b
138.21 ± 0.53 e
145.72 ± 1.56 c
2521.94 ± 14.64 d
367.19 ± 9.16 f
309.23 ± 4.35 e
398.64 ± 6.30 d
885.71 ± 29.16 g
82.79 ± 2.63 e
nd
2049.46 ± 32.23 g
97.77 ± 0.80 f
198.22 ± 1.88 d
166.92 ± 4.82 d
299.14 ± 7.07 e
147.61 ± 2.52 d
152.03 ± 0.23 b
1994.54 ± 19.38 e
338.58 ± 2.33 g
244.82 ± 2.24 g
257.16 ± 6.94 f
1110.10 ± 37.95ef
44.37 ± 2.14 f
24.08 ± 0.06 b
2036.14 ± 59.47 g
96.50 ± 0.94 f
114.93 ± 1.27 e
112.86 ± 2.68 f
293.49 ± 3.12 e
80.80 ± 0.08 f
70.88 ± 1.40 f
1454.21 ± 10.62 g
284.02 ± 1.59 h
212.97 ± 6.52 h
232.89 ± 3.42 g
1516.27 ± 11.82 d
118.79 ± 1.39 d
nd
4216.62 ± 20.01 d
254.67 ± 13.63 a
249.42 ± 2.59 c
203.24 ± 5.52 c
474.38 ± 1.18a
186.73 ± 2.39 b
89.96 ± 1.01 e
3131.95 ± 3.58 b
444.38 ± 1.55 d
444.95 ± 10.82 b
260.73 ± 1.74 f
1026.05 ± 0.92 f
127.68 ± 1.81 cd
nd
4409.03 ± 14.80 c
150.00 ± 0.90 d
243.80 ± 0.31 c
228.35 ± 0.91 b
360.94 ± 1.34 d
194.97 ± 1.01 a
153.20 ± 0.72b
2661.63 ± 32.09 c
407.97 ± 0.62 e
269.61 ± 1.39 f
320.01 ± 1.77 e
total
13378.22 ± 61.82
13212.23 ± 89.29
12810.36 ± 40.90
10749.06 ± 16.55
6914.75 ± 10.64
6168.24 ± 9.04
11592.07 ± 12.96
10553.23 ± 11.76
Journal of Agricultural and Food Chemistry
Table 1. Phytosterols Content (Micrograms per 100 mL of Lipid Fraction) and Profile of Sea Buckthorn Berries
a
AR, ‘Aromatnaja’; AV, ‘Avgustinka’; BOT, ‘Botaniczeskaja’; BOT-L, ‘Botaniczeskaja Ljubitelskaja’; LUC, ‘Luczistaja’; MOS, ‘Moskwiczanka’; PS, ‘Podarok Sadu’; POR, ‘Porożrachnaja’. Entries followed by
the same lower case letter constitute statistically homogeneous groups (Duncan test, p ≤ 0.05). Values are expressed as the mean ± standard deviation (n = 3). bnd, not detected.
D
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cultivarsa
AR
C14:0
C16:0
C16:1
C16:2
C18:0
C18:1
C18:1
C18:2
C18:3
C20:0
C20:1
(myristic)
(palmitic)
n-7 (palmitoleic)
n-7 (hexadecadienoic)
(stearic)
n-9 (oleic)
n-7 (cis-vaccenic)
n-6 (linoleic)
n-3 (linolenic)
(arachidic)
n-9 (eicosenoic)
∑SFAs
∑MUFAs
∑PUFAs
0.36
37.87
33.83
0.54
0.91
7.05
6.90
11.31
0.78
0.17
0.05
±
±
±
±
±
±
±
±
±
±
±
0.00
0.03
0.11
0.00
0.01
0.01
0.01
0.02
0.00
0.01
0.00
39.31 ± 0.12 b
47.82 ± 0.06 a
12.62 ± 0.05 c
AV
0.24
34.47
38.01
0.51
1.04
6.67
7.92
10.32
0.52
0.14
0.04
±
±
±
±
±
±
±
±
±
±
±
0.01
0.01
0.02
0.01
0.02
0.02
0.01
0.01
0.01
0.01
0.00
35.88 ± 0.04 b
52.63 ± 0.10 a
11.35 ± 0.40 c
BOT
0.17
37.83
34.21
0.47
1.04
8.02
7.40
9.93
0.66
0.17
0.06
±
±
±
±
±
±
±
±
±
±
±
0.00
0.02
0.08
0.01
0.02
0.04
0.01
0.04
0.00
0.00
0.01
39.21 ± 0.13 b
49.68 ± 0.14 a
11.06 ± 0.06 c
BOT-L
0.36
38.25
34.54
0.81
0.97
5.25
6.66
12.20
0.69
0.17
0.05
±
±
±
±
±
±
±
±
±
±
±
0.00
0.11
0.06
0.01
0.01
0.01
0.02
0.04
0.01
0.00
0.00
39.75 ± 0.01 b
46.50 ± 0.04 a
13.69 ± 0.03 c
LUC
0.64
35.62
38.51
1.01
0.64
4.26
6.94
11.51
0.65
0.14
0.04
±
±
±
±
±
±
±
±
±
±
±
0.01
0.17
0.11
0.01
0.01
0.02
0.01
0.06
0.01
0.01
0.00
37.03 ± 0.06 b
49.75 ± 0.05 a
13.16 ± 0.01 c
MOS
0.29
37.62
36.03
0.63
0.79
6.27
7.11
10.29
0.69
0.16
0.06
±
±
±
±
±
±
±
±
±
±
±
0.01
0.03
0.11
0.01
0.01
0.04
0.03
0.02
0.00
0.00
0.00
38.85 ± 0.03 b
49.47 ± 0.16 a
11.60 ± 0.03 c
PS
0.36
33.66
31.41
0.58
0.85
7.89
9.79
14.11
0.93
0.19
0.06
±
±
±
±
±
±
±
±
±
±
±
0.01
0.01
0.17
0.00
0.01
0.01
0.01
0.04
0.01
0.01
0.01
35.05 ± 0.04 b
49.14 ± 0.01 a
15.61 ± 0.00 c
POR
0.18
39.65
32.98
0.50
1.09
7.82
7.33
9.69
0.58
0.13
0.04
±
±
±
±
±
±
±
±
±
±
±
0.01
0.06
0.08
0.01
0.01
0.01
0.03
0.02
0.01
0.01
0.01
41.05 ± 0.05 b
48.16 ± 0.11 a
10.77 ± 0.02 c
Journal of Agricultural and Food Chemistry
Table 2. Fatty Acids Content (Percent) and Profile in Lipid Fraction from Sea Buckthorn Berries
a
AR, ‘Aromatnaja’; AV, ‘Avgustinka’; BOT, ‘Botaniczeskaja’; BOT-L, ‘Botaniczeskaja Ljubitelskaja’; LUC, ‘Luczistaja’; MOS, ‘Moskwiczanka’; PS, ‘Podarok Sadu’; POR, ‘Porożrachnaja’. SFAs, saturated
fatty acids; MUFAs, monounsaturated fatty acids; PUFAs, polyunsaturated fatty acids. Entries followed by the same lower case letter constitute statistically homogeneous groups (Duncan test, p ≤ 0.05).
Values are expressed as the mean ± standard deviation (n = 3).
E
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Journal of Agricultural and Food Chemistry
Article
Figure 2. L-Ascorbic acid content (mg/100 g fw) in berries of eight sea buckthorn cultivars.
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buckthorn and may exceed soybean oil by 4−20 times. βSitosterol and β-sitosterol-β-D-glucoside in sea buckthorn oils
are important for the antiulcerative activity. The efficacy of the
two compounds may differ depending on the cause of ulcer
formation.24
Fatty Acids Composition. The fatty acid (FA) compositions of sea buckthorn pulp oil are listed in Table 2. In the
examined samples 11 fatty acids were identified, including 3
PUFAs, 4 MUFAs, and 4 SFAs. The FA profile was dominated
by two compounds: palmitic acid (C16:0), which constituted
from 33.66 to 39.65% of the total fatty acids content (in
‘Podarok Sadu’ and ‘Porożr achnaja’, respectively), and
palmitoleic acid C16:1 n-7 (from 31.41% in ‘Podarok Sadu’
to 38.51% in ‘Luczustaja’). In relatively high concentration
occurred also 18-carbon unsaturated acids, that is, linoleic
C18:2 n-6 (9.69−14.11% in ‘Porożrachnaja’ and ‘Podarok
Sadu’, respectively), followed by cis-vaccenic C18:1 n-7 (6.66−
9.79% in ‘Botaniczeskaja Ljubitelskaja’ and ‘Podarok Sadu’) and
oleic C18:1 n-9 (4.26−8.02% in ‘Luczistaja’ and ‘Botaniczeskaja’). Other compounds presented in concentrations between
∼0.5% in the case of eicosenoic acid (C20:1 n-9) and ∼1% for
stearic acid (C18:0). From these results it can be concluded
that MUFAs were the dominant fatty acid classes (46.50−
52.63%), followed by SFAs (35.05−41.05%) and PUFAs
(10.77−15.61%).
According to Dulf,25 the dominating fatty acids in sea
buckthorn berry pulp/peel oils were palmitic (23−40%), oleic
(20−53%), and palmitoleic (11−27%). Small or trace amounts
of vaccenic, linoleic, α-linolenic, stearic, myristic, pentadecanoic, cis-7-hexadecenoic, margaric, and two long-chain fatty
acids, arachidic and eicosenoic acids, were observed in all
analyzed oils. As the author showed, in two from six tested
cultivars (C1 and C2), the proportions of oleic acid (32.76%
for C1 and 53.08% for C2) exceeded that of palmitoleic acid
(19.53% for C1 and 11.05% for C2). The fatty acid profile of
sea buckthorn was presented also by Khabarovet al.26 Oil
samples from berry pulp and skin (species H. rhamnoides)
contained the highest concentrations of palmitoleic > palmitic
> and oleic acid. Our research showed that the quantified
relationships between C16:1 and C16:0 acids noted by these
authors occurred only in the oil fraction from ‘Avgustinka’ and
‘Luczistaja’ fruits. At the same time, a higher content of linoleic
acid in all extracts was found. However, in the presented study
fractions from whole berries (with skin and seeds) were
examined, which could explain the observed differences. This is
dihydroxy-β-carotene, lycopene, zeaxanthin, and canthaxanthin.17 The content of carotenoids in fruits is subject to
extreme diversity. In the same population and species of the
genus Hippophaë a 10-fold difference in the content of these
components can be observed. As Yang’s18 study showed, the
concentration of β-carotene ranged between 0.2 and 17 mg/
100 g and that of total carotenoids from 1 to 120 mg/100 g fw
of sea buckthorn berries.
Phytosterols Content. Bioactive substances of sea buckthorn include phytosterols characterized by a documented
beneficial role in the prevention of cardiovascular diseases,
mainly hypercholesterolemia19,20 or cancer.21 The results of
qualitative and quantitative analyses of these compounds are
presented in Table 1.
The total content of phytosterols in the lipid fraction from
sea buckthorn pulp ranged from 6168.24 (‘Moskwiczanka’) to
13378.22 μg/100 mL (‘Aromatnaja’). The results of GC
analysis showed that in the examined extracts there occurred 14
compounds belonging to three subclasses of plant sterols, that
is, 4-desmethyl sterols (cholestanol derivatives, including βsitosterol, stigmasterol, campesterol, Δ5-avenasterol), 4αmonomethyl sterols (e.g., citrostadienol), and 4,4-dimethyl
sterols (e.g., 24-methylenecycloartanol). The predominant
compound was β-sitosterol (26.64−42.57% of the total
phytosterols in ‘Luczistaja’ and ‘Aromatnaja’, respectively). In
the high concentration occurred also 24-methylenecycloartanol.
This compound was determined in the range from 1454.21 to
4048.89 μg/100 mL in the lipid fraction from ‘Moskwiczanka’
and ‘Avgustinka’ berries.
Sea buckthorn can be considered as a valuable source of
squalene. Depending on the cultivar, the lipid fraction isolated
from berry pulp contained between 885.71 and 2714.37 μg/100
mL (‘Luczistaja’ and ‘Botaniczeskaja’). Moreover, concentrations in a range from 300 to 800 μg of substances, such as
erythrodiol > friedelan-3-ol > citrostadienol > or cycloartenol,
were noted. In sea buckthorn trace amounts of stigmasterol
were also detected. This compound was found only in two
cultivars, ‘Avgustinka’ and ‘Moskwiczanka’, and its contents
were 68.22 and 24.08 mg/100 mL (p < 0.05), respectively.
The results of the sterols profile analysis in sea buckthorn
were confirmed by studies of other authors, such as Li et al.22 or
Cenkowski et al.23 According to Bal et al.,2 the major
phytosterols in sea buckthorn oil are β-sitosterol and Δ5avenasterol. Other compounds are present in relatively minor
quantities. The total quantity of phytosterol is quite high in sea
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Figure 3. Polyphenols content (mg/100 g fw) and profile of sea buckthorn berries.
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f2
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f3
442
confirmed by George and Cenkowski.27 They proved that three
major fatty acids (palmitic, palmitoleic, oleic) accounted for
approximately 32.2, 26.5, and 18.7% of the total fatty acids in
the sea buckthorn fruit fraction, respectively. High levels of
palmitoleic acid are present in only a few plants products, such
as sea buckthorn pulp or macadamia nut oils. Because this fatty
acid is a major constituent of skin fat, the pulp oil is used for
cosmetic and healing purposes.3
Analysis of Hydrophilic Bioactive Compounds. LAscorbic Acid Content. Except for the lipophilic active
compounds, such as carotenoids and phytosterols, sea buckthorn is also rich in hydrophilic substances known for health
benefits properties, including L-ascorbic acid (Figure 2).
The mean content of ascorbic acid (AA) in the raw material
was 80.58 mg/100 g. Likewise, as in the case of previously
described compounds, the cultivar factor determined abundance of sea buckthorn in ascorbic acid (p < 0.05). The highest
concentration of this compound were characterized in
‘Aromatnaja’ (130.97 mg/100 g fw) followed by ‘Avgustinka’
(88.45 mg) > ‘Podarok Sadu’ (82.61 mg) > ‘Botaniczeskaja’
(80.40 mg) > ‘Moskwiczanka’ and ‘Porożrachnaja’ (74.79 and
75.08 mg; p > 0.05) > ‘Botaniczeskaja Ljubitelskaja’ (59.48 mg)
> ‘Luczistaja’ (52.86 mg). The presented results clearly showed
that in terms of ascorbic acid content most of the examined sea
buckthorn cultivars were definitely more valuable than many
other popular fruit species including strawberries (65 mg/100 g
fw), raspberries (29 mg), lemons (74.3 mg), mandarins (37.7
mg), or blackberry (21 mg).28
According to Tang,29 the content of ascorbic acid in sea
buckthorn (depending on the species, variety, region) was from
28 to 2500 mg/100 g. Berries of six cultivars examined by Rop
et al.30 contained between 398 and 573 mg AA/100 g fw (in
‘Buchlovicky’ and ‘Ljubitelna’, respectively). Kawecki et al.31
determined the highest content of ascorbic acid in
‘Trofimovskaja’ (197 mg/100 g) > ‘Otrodnaja’ (191 mg) >
‘Botaniczeskaja’ (178 mg) > and ‘Podarok Sadu’ (161 mg).
These values are therefore higher than in our study. However,
the authors paid attention not only to varietal but also seasonal
variation of ascorbic acid content in H. rhamnoides berries,
which explains the observed differences.
Polyphenols Content and Profile. Interesting results
were obtained indicating the content of polyphenols in sea
buckthorn (Figure 3). Berries were characterized by a high
concentration of flavonols (from 212.89 to 407.48 mg/100 g fw
in ‘Botaniczeskaja Ljubitelskaja’ and ‘Botaniczeskaja’, respectively; p < 0.05). The structure of these compounds was
investigated by qualitative analysis in LC-ESI/MS system
performed in negative ionization mode (Table 3; Figure 4).
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444
445
446
447 t3f4
Table 3. LC-MS Identification of Sea Buckthorn Flavonols
a
MSMS
(m/z)
no.
tRa
(min)
λmax
[M − H]−
(m/z)
1
2
5.56
5.90
352
354
639
785
315
639
3
6.37
354
755
609
4
5
6.77
7.33
354
352
609
609
6
7.51
354
771
301
301,
447
625
7
8
9
7.59
8.49
8.78
355
348
353
623
593
623
315
285
315
10
11
9.03
11.28
354
356
477
869
315
723
compound
isorhamnetin-3,7-diglucoside
isorhamnetin-3-sophoroside7-rhamnoside
quercetin-glucosiderhamnoside-7-rhamnoside
quercetin-3-rutinoside
quercetin-3-glucoside-7rhamnoside
quercetin-3-sophoroside-7rhamnoside
isorhamnetin-3-rutinoside
kaempferol-3-rutinoside
isorhamnetin-3rhamnosylglucoside
isorhamnetin-3-glucoside
isorhamnetin-3-acyloglucoside-glucoside-7rhamnoside
tR, retention time.
The examined sea buckthorn cultivars contained 11 flavonols,
which were primarily derived of isorhamnetin (6 compounds),
quercetin (4 compounds), and kaempferol (1 compound). The
strongest signal in the obtained mass spectrum with a value of
[MH]− at m/z 623 and a retention time of 8.78 min came from
isorhamnetin-3-rhamnosylglucoside (compound 9). The source
of two successive intensity signals was compound 7 with a
molecular weight [M − H]− at m/z 623 and 10 ([MH]− at m/z
477). In regard to the fragmentation direction of both
compounds, that is, loss of the aglycone molecule with MSMS (m/z) 315, UV−vis spectrum, and LC-MS standards
analysis, as well as the literature data,32 these compounds were
identified as monoglycosides: isorhamnetin-3-rutinoside (compound 7; tR 7.59 min) and isorhamnetin-3-glucoside (compound 10; tR 9.03 min). Among the quercetin derivatives,
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Figure 4. LC-ESI/MS spectrum and the chromatogram (360 nm) of sea buckthorn flavonols (cv. ‘Porożrachnaja’).
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these compounds can be used as biomarkers for classification or
recognition of sea buckthorn berries belonging to different
species and varieties.40
Besides flavonols in sea buckthorn berries compounds
belonging to three other groups of polyphenols, that is,
polymeric proanthocyanidins, mono-, di-, and oligomers of
flavan-3-ols, and phenolic acids, were determined. The highest
contents of flavan-3-ols (88.04 mg/100 g fw) and phenolic
acids (5.81 mg/100 g fw) were characterized by fruits of
‘Avgustinka’. ‘Luczistaja’ was the richest in polymeric
proanthocyanidins (5.76 mg/100 g fw), but contained the
least value of phenolic acids (3.11 mg/100 g fw). Similarly to
the flavonols determination, also flavan-3-ols concentration was
the lowest in ‘Botaniczeskaja Ljubitelskaja’ (44.94 mg/100 g
fw).
Compared to Hosseinian et al.42 total proanthocyanidins
content in examined samples was significantly different,
especially in the case of polymeric form. In the whole fruit
methanol fraction the authors noted 36.56 mg of polymeric
proanthocyanidins per 100 g fw basis and 98.95 mg of mono-,
di-, and oligomeric compounds. In our study a similar value of
simple flavan-3-ols was determined only in ‘Avgustinka’ berries.
This proves, however, that the content of polyphenols in plants
is a result of many factors, such as cultivar, harvest year, or
geographical origin. This correlation has been previously
described in the literature.43,44
The proanthocyanidins profile in sea buckthorn is varied.
According to Rösch et al.45 the concentration of reaction
products after acid-catalyzed cleavage (determined by HPLC)
and calculated composition of sea buckthorn proanthocyanidins
showed that major compounds were phloroglucinol adducts
with (+)-gallocatechin, followed by (+)-catechin and (−)-epicatechin. The ratio between prodelphinidins (PD) and
procyanidins (PC) was 2.1:1. On the basis of ESI-MS analysis,
the authors detected compounds with different polymerization
degrees, including pentameric, hexameric, heptameric, nonameric, and decameric proanthocyanidins.
quercetin-3-glucoside-7-rhamnoside was dominant (compound
5; [MH]− at m/z 609, tR 7.33 min). After ion fragmentation, a
strong, typical signal was registered from an ion with molecular
mass MS-MS (m/z) 301. The signals from fission products of
glucose ([M − H− 162]− at m/z 447) and rhamnose ([M − H−
146]− at m/z 463) were less abundant and characterized by a
similar intensity.
According to Yang et al.33 sea buckthorn berries of subsp.
mongolica contain 80.6 mg flavonols/100 g fw, which is a
significantly higher value than noted in chokeberry (23−40
mg/100 g fw),34 cranberry (20−40 mg/100 g fw),35 black
currant (17−38 mg/100 g fw),36 or bilberry (10−16 mg/100 g
fw).37,38 The results of our study also confirm this relationship;,
however, in sea buckthorn we noted ca. a 4-fold higher content
of flavonols.
The most common flavonols in sea buckthorn fruits are
isorhamnetin derivatives with mono-, di-, and triglycoside
structures.33,39 As Pop et al.40 research showed, in fruits and
leaves of H. rhamnoides L. subsp. carpatica (cv. ‘Serpenta’,
‘Serbanesti 4’, ‘Victoria’, ‘Sf. Gheorghe’, ‘Ovidiu’, and ‘Tiberiu’)
17 and 19 flavonols occurred, respectively. Isorhamnetin-3neohesperidoside, isorhamnetin-3-glucoside, isorhamnetin-3rhamnosylglucoside, isorhamnetin-3-sophoroside-7-rhamnoside, and free isorhamnetin were predominant in the case of
berries. In rhamnoides subspecies, the major compounds
indicated by Kallio et al.39 were isorhamnetin-3-sophoroside7-rhamnoside > quercetin-3-glucoside > quercetin-3-rutinoside
> isorhamnetin-3-rutinoside > isorhamnetin-3-glucoside. Chen
et al.41 isolated from the n-butanol fraction of sea buckthorn
(subsp. sinensis) berries a novel acylated flavonol glycoside,
isorhamnetin (3-O-[(6-O-E-sinapoyl)-β-D-glucopyranosyl-(1→
2)]-β-D-glucopyranosyl-7-O-α-L-rhamnopyranoside), together
with two known acylated flavonols glycosides, quercetin (3O-[(6-O-E-sinapoyl)-β-D-glucopyranosyl-(1→2)]-β-D-glucopyranosyl-7-O-α-L-rhamnopyranoside) and kaempferol (3-O-[(6O-E-sinapoyl)-β-D-glucopyranosyl-(1→2)]-β-D-glucopyranosyl7-O-α-L-rhamnopyranoside). Due to such significant differences
of sea buckthorn berries in terms of flavonol glycosides content,
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■
AUTHOR INFORMATION
Corresponding Author
*(A.W.) Phone: +48 71 320 77 06. Fax: +48 71 320 77 07. Email: aneta.wojdylo@up.wroc.pl
576
Funding
577
578
This work was supported by the European Union under Project
POIG 01.01.02-00-061/09, acronym “Bioactive food”.
579
Notes
580
The authors declare no competing financial interest.
581
ACKNOWLEDGMENTS
We thank Marii Bortkiewicz and Elżbiecie Buckiej for their
technical assistance.
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(5) Rongsen, L.; Ahani, H. The genetic resources of Hippophae genus
and its utilization. Int. J. Scholary Res. Gate 2013, 1, 15−21.
(6) Szałkiewicz, M.; Zadernowski, R. Sea buckthorn: possibilities for
the production and use of fruit (in polish). Hasło Ogrodnicze. 2006, 02,
http://www.ho.haslo.pl/article.php?id=2601.
(7) Kallio, H.; Yang, B.; Peippo, P. Effects of different origins and
harvesting time on vitamin C, tocopherols, and tocotrienols in sea
buckthorn (Hippophaë rhamnoides) berries. J. Agric. Food Chem. 2002,
50, 6136−6142.
(8) Kalinina, I. P.; Panteleyeva, Y. I. Breeding of sea buckthorn in the
Altai. In Advances in Agricultural Science; Nauk: Moscow, Russia, 1987;
pp 76−87.
(9) Hussain, M.; Ali, S.; Awan, S.; Hussain, M.; Hussain, I. Analysis of
minerals and vitamins in sea buckthorn (Hippophae rhamnoides) pulp
collected from Ghizer and Skardu districts of Gilgit-Baltistan. Int. J.
Biosci. 2014, 4, 144−152.
(10) PN-90/A-75101/12: Fruits and vegetables preserves. Preparation of samples and physico-chemical test methods. Determination of
total carotenoids and β-carotene,1990.
(11) AOCS Official Method Ch 6-91. Determination of the
composition of the sterol fraction of animal and vegetable oils and
fats by TLC and capillary GLC.
(12) AOCS Official Method Ce 1k-07. Direct methylation of lipids
for the determination of total fat, saturated, cis-monounsaturated, cispolyunsaturated, and trans fatty acids by chromatography.
(13) Oszmiański, J.; Wojdyło, A. Effects of black currant and apple
pulp blended on phenolics, antioxidant capacity and colour of juices.
Czech J. Food Sci. 2009, 27, 338−351.
(14) Wojdyło, A.; Teleszko, M.; Oszmiański, J. Antioxidant property
and storage stability of quince juice phenolic compounds. Food Chem.
2014, 152, 261−270.
(15) Kruczek, M.; Świderski, A.; Mech-Nowak, A.; Król, K.
Antioxidant capacity of crude extracts containing carotenoids from
the berries of various cultivars of Sea buckthorn (Hippophae
rhamnoides L.). Acta Biochim. Pol. 2012, 59, 135−137.
(16) Müller, H. Determination of the carotenoid content in selected
vegetables and fruit by HPLC and photodiode array detection. Z.
Lebensm. Unters. Forsch. A 1997, 204, 88−94.
(17) Yang, B.; Kallio, H. Composition and physiological effects of sea
buckthorn (Hippophaë) lipids. Trends Food Sci. Technol. 2002, 13 (5),
160−167.
(18) Yang, B. Lipophilic Components in Seeds and Berries of Sea
Buckthorn and Physiological Effects of Sea Buckthorn Oils. Ph.D. thesis,
University of Turku, Turku, Finland, 2001.
(19) Davidson, M. H.; Maki, K. C.; Umporowicz, D. M.; Ingram, K.
A.; Dicklin, M. R.; Schaefer, E.; Lane, R. W.; McNamara, J. R.; RibayaMercado, J. D.; Perrone, G.; Robins, S. J.; Franke, W. C. Safety and
tolerability of esterified phytosterols administered in reduced-fat
spread and salad dressing to healthy adult men and women. J. Am.
Coll. Nutr. 2001, 20, 307−319.
(20) Neil, H. A.; Meijer, G. W.; Roe, L. S. Randomised controlled
trial of use by hypercholesterolaemic patients of a vegetable oil sterolenriched fat spread. Atherosclerosis 2001, 156 (2), 329−337.
(21) Woyengo, T. A.; Ramprasath, V. R.; Jones, P. J. Anticancer
effects of phytosterols. Eur. J. Clin. Nutr. 2009, 63, 813−820.
(22) Li, T. S. C.; Beveridge, T. H. J.; Drover, J. C. G. Phytosterol
content of sea buckthorn (Hippophaë rhamnoides L.) seed oil:
extraction and identification. Food Chem. 2007, 101, 1665−1671.
(23) Cenkowski, S.; Yakimishen, R.; Przybylski, R.; Muir, W. E.
Quality of extracted sea buckthorn seed and pulp oil. Can. Biosyst. Eng.
2006, 48, 3.9−3.16.
(24) Erkkola, R.; Yang, B. Sea buckthorn oils: towards healthy
mucous membranes. Agro Food Ind. Hi-Tech. 2003, May/June 2003,
43−57.
(25) Dulf, F. V. Fatty acids in berry lipids of six sea buckthorn
(Hippophaë rhamnoides L., subspecies carpatica) cultivars grown in
Romania. Chem. Cent. J. 2012, 6, 1−12.
(26) Khabarov, S. N.; Vereshchagin, A. L.; Gur’yanov, G.;
Goremykina, N. V.; Bychin, N. V. Identification of the origin of sea
With the phenolic acids structure taken into account, the
compounds liberated from soluble esters are predominant in
sea buckthorn berries (from 53.9 to 66.6%). Free phenolic acids
are a minor fraction and constitute only 1.3−2.3%.46 According
to Arimboor et al.,47 berry pulp contained a total of 1068 mg/
kg phenolic acids, of which 58.8% was derived from phenolic
glycosides. Free phenolic acids and phenolic acid esters
constituted 20.0 and 21.2%, respectively. As the authors
showed, gallic acid was identified as the predominant phenolic
acid in both free and bound forms (66.0% of total phenolic
acids in pulp). Considerable amounts of protocatechuic (136
mg/kg), ferulic (69 mg/kg), salicylic (54 mg/kg), phydroxybenzoic (40 mg/kg), and p-coumaric acid (37 mg/
kg) were found to be present in berry pulp. The presence of
vanillic (7 mg/kg), cinnamic (12 mg/kg), and caffeic acids (8
mg/kg) was also detected.
Sea buckthorn berries are a valuable source of compounds
with beneficial effects for human health. The high concentrations of flavonols, L-ascorbic acid, but mostly lipophilic
substances, namely, carotenoids, phytosterols, and fatty acids,
determine the uniqueness of its chemical composition in
comparison to other fruits. Our research confirms that the
content of plant bioactives in the raw material significantly
affects the cultivar factor. ‘Aromatnaja’ was characterized by the
highest content of L-ascorbic acid and phytosterols, whereas
‘Podarok Sadu’ berries were rich in PUFAs. In ‘Moskwiczanka’
the highest carotenoids and in ‘Botaniczeskaja’ the highest
polyphenol concentrations were noted.
Among the tested active compounds of sea buckthorn, the
most diverse was the phytosterols profile, which consisted of 14
compounds, including 4-desmethyl sterols (e.g., β-sitosterol,
stigmasterol, campesterol, Δ5-avenasterol), 4α-monomethyl
sterols (e.g., citrostadienol), and 4,4-dimethyl sterols (e.g., 24methylenecycloartanol).
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REFERENCES
(1) Rousi, A. The genus Hippophaë L. A taxonomic study. Ann. Bot.
Fenn. 1971, 8, 177−227.
(2) Bal, L. M.; Meda, V.; Naik, S. N.; Satya, S. Sea buckthorn berries:
a potential source of valuable nutrients for nutraceuticals and
cosmoceuticals. Food Res. Int. 2011, 44, 1718−1727.
(3) Fatima, T.; Snyder, C. L.; Schroeder, W. R.; Cram, D.; Datla, R.;
Wishart, D.; Weselake, R. J.; Krishna, P. Fatty acid composition of
developing sea buckthorn (Hippophaë rhamnoides L.) berry and the
transcriptome of the mature seed. PLoS One 2012, 7, 2−18.
(4) Patel, C. A.; Divakar, K.; Santani, D.; Solanki, H. K.; Thakkar, J.
H. Remedial prospective of Hippophaë rhamnoides Linn. (sea
buckthorn). ISRN Pharmacol. 2012, 2012, 1−6.
I
DOI: 10.1021/acs.jafc.5b00564
J. Agric. Food Chem. XXXX, XXX, XXX−XXX
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
Journal of Agricultural and Food Chemistry
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
Article
(46) Zadernowski, R.; Naczk, M.; Czaplicki, S.; Rubinskiene, M.;
Szałkiewicz, M. Composition of phenolic acids in sea buckthorn
(Hippophae rhamnoides L.) berries. J. Am. Oil Chem. Soc. 2005, 82,
175−179.
(47) Arimboor, R.; Sarin Kumar, K.; Arumughan, C. Simultaneous
estimation of phenolic acids in sea buckthorn (Hippophaë rhamnoides)
using RP-HPLC with DAD. J. Pharm. Biomed. Anal. 2008, 4, 31−38.
buckthorn oil of the Altai Krai by differential scanning calorimetry.
Foods Raw Mater. 2013, 1, 108−113.
(27) George, S. D. St.; Cenkowski, S. Influence of harvest time on the
quality of oil-based compounds in sea buckthorn (Hippophaë
rhamnoides L. ssp. sinensis) seed and fruit. J. Agric. Food Chem.
2007, 55, 8054−8061.
(28) Lee, S. K.; Kader, A. A. Preharvest and postharvest factors
influencing vitamin C content of horticultural crops. Postharvest Biol.
Technol. 2000, 20, 207−220.
(29) Tang, X. Intrinsic change of physical and chemical properties of
sea buckthorn (Hippophaë rhamnoides) and implications for berry
maturity and quality. J. Hortic. Sci. Biotechnol. 2002, 77, 177−185.
(30) Rop, O.; Ercişli, S.; Mlcek, J.; Jurikova, T.; Hoza, I. Antioxidant
and radical scavenging activities in fruits of 6 sea buckthorn
(Hippophaë rhamnoides L.) cultivars. Turk. J. Agric. For. 2014, 38,
224−232.
(31) Kawecki, Z.; Szałkiewicz, M.; Bieniek, A. The common sea
buckthorn − a valuable fruit. J. Fruit Ornam. Plant Res. Special Ed.
2004, 12, 183−193.
(32) Rösch, D.; Krumbein, K.; Mügge, C.; Fogliano, V.; Kroh, L. W.
Structural investigations of flavonol glycosides from sea buckthorn
(Hippophaë rhamnoides) pomace by NMR spectroscopy and HPLCESI-MSn. J. Agric. Food Chem. 2004, 52, 4039−4046.
(33) Yang, B.; Halttunen, T.; Raimo, O.; Price, K.; Kallio, H.
Flavonol glycosides in wild and cultivated berries of three major
subspecies of Hippophaë rhamnoides and changes during harvesting
period. Food Chem. 2009, 115, 657−664.
(34) Jakobek, L.; Drenjančević, M.; Jukić, V.; Šeruga, M. Phenolic
acids, flavonols, anthocyanins and antiradical activity of ‘Nero’,
‘Viking’, ‘Galicjanka’ and wild chokeberries. Sci. Hortic. 2012, 147,
56−63.
(35) Pappas, E.; Schaich, K. M. Phytochemicals of cranberries and
cranberry products: characterization, potential health efects, and
processing stability. Crit. Rev. Food Sci. Nutr. 2009, 49, 741−781.
(36) Mikkonen, T. P.; Mäaẗ tä, K. R.; Hukkanen, A T.; Kokko, H. I.;
Törrönen, A. R.; Kärenlampi, S. O.; Korjalajnen, R. O. Flavonol
content varies among black currant cultivars. J. Agric. Food Chem. 2001,
49, 3274−3277.
(37) Laaksonen, O.; Sandell, M.; Kallio, H. Chemical factors
contributing to orosensory profiles of bilberry (Vaccinium myrtillus)
fractions. Eur. Food Res. Technol. 2010, 231, 271−285.
(38) Aherne, S. A.; O’Brien, N. M. Dietary flavonols: chemistry, food
content, and metabolism. Nutrition 2002, 18, 75−81.
(39) Kallio, H.; Yang, B.; Halttunen, T. Flavonol glycosides of berries
of three major sea buckthorn subspecies, Hippophaë rhamnoides ssp.
rhamnoides, ssp. sinensis and ssp. mongolica. Proceedings of Invited
Speeches for the Second International Sea Buckthorn Association
Conference, Beijing, China, 2005; pp 29−35.
(40) Pop, R. M.; Socaciu, C.; Pintea, A.; Buzoianu, A. D.; Sanders, M.
G.; Gruppen, H.; Vincken, J. P. UHPLC/PDA−ESI/MS analysis of
the main berry and leaf flavonol glycosides from different Carpathian
Hippophaë rhamnoides L. varieties. Phytochem. Anal. 2013, 24, 484−
492.
(41) Chen, Ch.; Xu, X.-M.; Chen, Y.; Yu, M.-Y.; Wen, F.-Y.; Zhang,
H. Identification, quantification and antioxidant activity of acylated
flavonol glycosides from sea buckthorn (Hippophaë rhamnoides ssp.
sinensis). Food Chem. 2013, 141 (2013), 1573−1579.
(42) Hosseinian, F. S.; Li, W.; Hydamaka, A. W.; Tsopmo, A.; Lowry,
L.; Friel, J.; Beta, T. Proanthocyanidin profile and ORAC values of
manitoba berries, chokecherries, and seabuckthorn. J. Agric. Food
Chem. 2007, 55, 6970−6976.
(43) Bolling, B. W.; Dolnikowski, G.; Blumberg, J. B.; Chen, C.-Y.O.
Polyphenol content and antioxidant activity of California almonds
depend on cultivar and harvest year. Food Chem. 2010, 122, 819−825.
(44) Jaakola, L.; Hohtola, A. Effect of latitude on flavonoid
biosynthesis in plants. Plant, Cell Environ. 2010, 33, 1239−1247.
(45) Rösch, D.; Mügge, C.; Fogliano, V.; Kroh, L. W. Antioxidant
oligomeric proanthocyanidins from sea buckthorn (Hippophaë
rhamnoides) pomace. J. Agric. Food Chem. 2004, 52, 6712−6718.
J
DOI: 10.1021/acs.jafc.5b00564
J. Agric. Food Chem. XXXX, XXX, XXX−XXX
735
736
737
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739
740
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