DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2015
В работе рассмотрено положение в системе крестоцветных тибетского эндемика Dontostemon tibeticus,... more В работе рассмотрено положение в системе крестоцветных тибетского эндемика Dontostemon tibeticus, до 2000 года известного под названием Nasturtium tibeticum. Вид отнесен к новому монотипному роду Shehbazia. Кратко обсуждены морфологические и молекулярные данные, которые позволяют предполагать возникновение данного таксона в результате древней межтрибовой гибридизации (Chorisporeae × Dontostemoneae), в связи с чем также установлена новая триба Shehbazieae. DOI: 10.14258/turczaninowia.17.4.3
A taxonomic revision of the genus Allium in Mongolia is presented including a key, complete synon... more A taxonomic revision of the genus Allium in Mongolia is presented including a key, complete synonymy and distribution for all taxa with distribution maps. A total of 44 species is recognized and grouped into two subgenera and 11 sections. Most of the species (96%) belong to the subgenus Rhizirideum.
Lemnaceae, commonly called duckweeds, comprise a diverse group of floating aquatic plants that ha... more Lemnaceae, commonly called duckweeds, comprise a diverse group of floating aquatic plants that have previously been classified into 37 species based on morphological and physiological criteria. In addition to their unique evolutionary position among angiosperms and their applications in biomonitoring, the potential of duckweeds as a novel sustainable crop for fuel and feed has recently increased interest in the study of their biodiversity and systematics. However, due to their small size and abbreviated structure, accurate typing of duckweeds based on morphology can be challenging. In the past decade, attempts to employ molecular barcoding techniques for species assignment have produced promising results; however, they have yet to be codified into a simple and quantitative protocol. A study that compiles and compares the barcode sequences within all known species of this family would help to establish the fidelity and limits of this DNA-based approach. In this work, we compared the ...
Polymorph Allium pallasii s.l. from monotypic A. sect. Pallasia was studied using a wide spectrum... more Polymorph Allium pallasii s.l. from monotypic A. sect. Pallasia was studied using a wide spectrum of methods and divided into two clearly morphologically, geographically, cytologically and genetically isolated species: A. pallasii s. str.—North-East Kazakhstan, Western Siberia, and the Altai Mountains; A. caricifolium—Kyrgyzstan, Northwest China, South-East Kazakhstan until Zaysan Lake in the east. Despite serious genetic differences, both species are sisters and are related to species of the A. sect. Codonoprasum (Subg. Allium). Allium caricifolium differs from A. pallasii s. str. by taller stems, dense inflorescence, and with filaments longer than perianth. The possible phylogenetic reasons for the separation of these species are discussed. A nomenclature analysis of synonyms was carried out.
A new species, Allium sulaimanicum, is described from northern Balochistan and southern Khyber Pa... more A new species, Allium sulaimanicum, is described from northern Balochistan and southern Khyber Pakhtunkhwa in Pakistan based on morphological, molecular, and cytological studies. The new species is characterised by long runner-like cylindrical rhizomes of adult plants, cylindrical bulbs, linear leaves with minute soft hairs along veins, campanulate perigonium, and white to creamy white, ovate to elliptical, 4.5–5-mm-long acute tepals, with brownish to purplish nerves, stamens as long as to slightly longer than tepals, yellow to brick red anthers, hexagonal ovary, and white and papillate/warty along angles. The presence of long herbaceous rhizomes indicated serious isolation of the new species; hence, a new section Sulaimanicum is proposed to accommodate the new species. The new species is diploid with a chromosome number of 2n = 16. Detailed morphological description, illustrations, phylogenetic analyses based on sequences of plastid spacers (rpl32-trnL (UAG) and trnQ-rps16) and nuc...
FIGURE 3. Phylogenetic tree based on a combined plastid DNA (trnL-trnF, rpl32-trnL and rps16) seq... more FIGURE 3. Phylogenetic tree based on a combined plastid DNA (trnL-trnF, rpl32-trnL and rps16) sequence data set. Bayesian posterior probabilities above branches, bootstrap support over 50% below branches.
FIGURE 1. Metaphase chromosomes of Allium canariense from La Palma, 2n = 28 (a); Idiogram of Alli... more FIGURE 1. Metaphase chromosomes of Allium canariense from La Palma, 2n = 28 (a); Idiogram of Allium canariense, n = 14 (b).
DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2015
В работе рассмотрено положение в системе крестоцветных тибетского эндемика Dontostemon tibeticus,... more В работе рассмотрено положение в системе крестоцветных тибетского эндемика Dontostemon tibeticus, до 2000 года известного под названием Nasturtium tibeticum. Вид отнесен к новому монотипному роду Shehbazia. Кратко обсуждены морфологические и молекулярные данные, которые позволяют предполагать возникновение данного таксона в результате древней межтрибовой гибридизации (Chorisporeae × Dontostemoneae), в связи с чем также установлена новая триба Shehbazieae. DOI: 10.14258/turczaninowia.17.4.3
A taxonomic revision of the genus Allium in Mongolia is presented including a key, complete synon... more A taxonomic revision of the genus Allium in Mongolia is presented including a key, complete synonymy and distribution for all taxa with distribution maps. A total of 44 species is recognized and grouped into two subgenera and 11 sections. Most of the species (96%) belong to the subgenus Rhizirideum.
Lemnaceae, commonly called duckweeds, comprise a diverse group of floating aquatic plants that ha... more Lemnaceae, commonly called duckweeds, comprise a diverse group of floating aquatic plants that have previously been classified into 37 species based on morphological and physiological criteria. In addition to their unique evolutionary position among angiosperms and their applications in biomonitoring, the potential of duckweeds as a novel sustainable crop for fuel and feed has recently increased interest in the study of their biodiversity and systematics. However, due to their small size and abbreviated structure, accurate typing of duckweeds based on morphology can be challenging. In the past decade, attempts to employ molecular barcoding techniques for species assignment have produced promising results; however, they have yet to be codified into a simple and quantitative protocol. A study that compiles and compares the barcode sequences within all known species of this family would help to establish the fidelity and limits of this DNA-based approach. In this work, we compared the ...
Polymorph Allium pallasii s.l. from monotypic A. sect. Pallasia was studied using a wide spectrum... more Polymorph Allium pallasii s.l. from monotypic A. sect. Pallasia was studied using a wide spectrum of methods and divided into two clearly morphologically, geographically, cytologically and genetically isolated species: A. pallasii s. str.—North-East Kazakhstan, Western Siberia, and the Altai Mountains; A. caricifolium—Kyrgyzstan, Northwest China, South-East Kazakhstan until Zaysan Lake in the east. Despite serious genetic differences, both species are sisters and are related to species of the A. sect. Codonoprasum (Subg. Allium). Allium caricifolium differs from A. pallasii s. str. by taller stems, dense inflorescence, and with filaments longer than perianth. The possible phylogenetic reasons for the separation of these species are discussed. A nomenclature analysis of synonyms was carried out.
A new species, Allium sulaimanicum, is described from northern Balochistan and southern Khyber Pa... more A new species, Allium sulaimanicum, is described from northern Balochistan and southern Khyber Pakhtunkhwa in Pakistan based on morphological, molecular, and cytological studies. The new species is characterised by long runner-like cylindrical rhizomes of adult plants, cylindrical bulbs, linear leaves with minute soft hairs along veins, campanulate perigonium, and white to creamy white, ovate to elliptical, 4.5–5-mm-long acute tepals, with brownish to purplish nerves, stamens as long as to slightly longer than tepals, yellow to brick red anthers, hexagonal ovary, and white and papillate/warty along angles. The presence of long herbaceous rhizomes indicated serious isolation of the new species; hence, a new section Sulaimanicum is proposed to accommodate the new species. The new species is diploid with a chromosome number of 2n = 16. Detailed morphological description, illustrations, phylogenetic analyses based on sequences of plastid spacers (rpl32-trnL (UAG) and trnQ-rps16) and nuc...
FIGURE 3. Phylogenetic tree based on a combined plastid DNA (trnL-trnF, rpl32-trnL and rps16) seq... more FIGURE 3. Phylogenetic tree based on a combined plastid DNA (trnL-trnF, rpl32-trnL and rps16) sequence data set. Bayesian posterior probabilities above branches, bootstrap support over 50% below branches.
FIGURE 1. Metaphase chromosomes of Allium canariense from La Palma, 2n = 28 (a); Idiogram of Alli... more FIGURE 1. Metaphase chromosomes of Allium canariense from La Palma, 2n = 28 (a); Idiogram of Allium canariense, n = 14 (b).
Uploads
Papers by Nikolai Friesen