The present study provides an analysis of soil, vegetation types as well as structure and species... more The present study provides an analysis of soil, vegetation types as well as structure and species distribution in 19 sites in El-Qaa plain along the Gulf of Suez (south Sinai, Egypt), and focuses on the environmental factors that control the species distribution. A total of 203 species belonging to 39 families of the vascular plants are recorded. Asteraceae, Fabaceae, Chenopodiaceae
In Egypt, taxonomic aspects of the genus Pancratium L. (Amaryllidaceae, Pancratieae) were thoroug... more In Egypt, taxonomic aspects of the genus Pancratium L. (Amaryllidaceae, Pancratieae) were thoroughly studied to point out the most reliable characters for taxon delimitation. Here, we base our species on both geographical and morphological features. The detailed taxonomic revision of genus Pancratium is based on field studies and the examination of representative specimens together with the authentic types deposited in the major herbaria of Egypt and Kew. Variations in the aerial scape, spathe, perianth, corona-teeth, pistil, stamens, capsules and seeds, as well as those of leaf base and leaf orientation are good markers to separate the different species. As a result, five species are recognized, including P. trianthum as a new record to the flora of Egypt. It is restricted to the southeastern corner of Egypt (Gebel Elba region) and being unique in possessing solitary spathe and long attenuate leaf base. A specific key and descriptions are given with typifications.
Heavy metal (lead) concentrations in two marsh plants (Phragmites australis and Cyperus rotundus)... more Heavy metal (lead) concentrations in two marsh plants (Phragmites australis and Cyperus rotundus) and one free floating hydrophyte (Eichhornia crassipes) growing near metal smelters (lead pollutant area) were investigated. The shoots of the investigated plants were analyzed for lead content by flame atomic absorption spectrometry. The data indicated high lead levels due to the influence of urban and industrial effluents. This showed that the target plants could be considered as lead pollution biosensors. Scanning electron microscopy (SEM) and positron annihilation lifetimes (PAL) technique were used to ascertain the localization of lead in the living tissues. Cross-sections of plant organs were examined using SEM attached with an Energy Dispersed X-ray (EDX) unit for elemental analysis of the formed crystals that appeared abundant in the aerenchyma tissues of the polluted plants. PAL data reflected the correlation between the fraction of free volume hole and lead concentration; high...
This study was conducted to revise the taxonomic identity and clarify inter-and intra-specific re... more This study was conducted to revise the taxonomic identity and clarify inter-and intra-specific relationships among the studied wild and cultivated Hordeum taxa in Egypt. The studied taxa included Hordeum marinum subsp. gussoneanum, H. marinum subsp. marinum, H. Hordeum leporinum, Hordeum glaucum, Hordeum spontaneum and Hordeum vulgare. The results revealed that unweighted pair group method with arithmetic mean (UPGMA) dendrogram showed a considerable degree of dissimilarity among the studied Hordeum taxa at 1.50 dissimilarity distance. It divided the studied taxa into four groups
Preliminary phytochemical screening of the plant Thymus capitatus exhibited the presence of sapon... more Preliminary phytochemical screening of the plant Thymus capitatus exhibited the presence of saponins, resins, flavonoids, essential and fixed oils. Aqueous and ethanolic extracts (10-200 mg/ml) as well as saponin, resin and essential oil of the plant (10-5000 micrograms/ml inhibited the growth of several bacteria and fungi.
... hybrida seems to be highly specialized due to the fact that it contains C-glycosides, hithert... more ... hybrida seems to be highly specialized due to the fact that it contains C-glycosides, hitherto 673 674 NABIEL A. M SALEH, SALWA A. MAKSOUD, MOHAMED N. EL-HADIDI AND ... Furnaria parviflora Lam.; Gardens of Faculty of Agriculture, Giza, 4 February 1985, S. EI-Sissi. ...
The present study provides an analysis of soil, vegetation types as well as structure and species... more The present study provides an analysis of soil, vegetation types as well as structure and species distribution in 19 sites in El-Qaa plain along the Gulf of Suez (south Sinai, Egypt), and focuses on the environmental factors that control the species distribution. A total of 203 species belonging to 39 families of the vascular plants are recorded. Asteraceae, Fabaceae, Chenopodiaceae
In Egypt, taxonomic aspects of the genus Pancratium L. (Amaryllidaceae, Pancratieae) were thoroug... more In Egypt, taxonomic aspects of the genus Pancratium L. (Amaryllidaceae, Pancratieae) were thoroughly studied to point out the most reliable characters for taxon delimitation. Here, we base our species on both geographical and morphological features. The detailed taxonomic revision of genus Pancratium is based on field studies and the examination of representative specimens together with the authentic types deposited in the major herbaria of Egypt and Kew. Variations in the aerial scape, spathe, perianth, corona-teeth, pistil, stamens, capsules and seeds, as well as those of leaf base and leaf orientation are good markers to separate the different species. As a result, five species are recognized, including P. trianthum as a new record to the flora of Egypt. It is restricted to the southeastern corner of Egypt (Gebel Elba region) and being unique in possessing solitary spathe and long attenuate leaf base. A specific key and descriptions are given with typifications.
Heavy metal (lead) concentrations in two marsh plants (Phragmites australis and Cyperus rotundus)... more Heavy metal (lead) concentrations in two marsh plants (Phragmites australis and Cyperus rotundus) and one free floating hydrophyte (Eichhornia crassipes) growing near metal smelters (lead pollutant area) were investigated. The shoots of the investigated plants were analyzed for lead content by flame atomic absorption spectrometry. The data indicated high lead levels due to the influence of urban and industrial effluents. This showed that the target plants could be considered as lead pollution biosensors. Scanning electron microscopy (SEM) and positron annihilation lifetimes (PAL) technique were used to ascertain the localization of lead in the living tissues. Cross-sections of plant organs were examined using SEM attached with an Energy Dispersed X-ray (EDX) unit for elemental analysis of the formed crystals that appeared abundant in the aerenchyma tissues of the polluted plants. PAL data reflected the correlation between the fraction of free volume hole and lead concentration; high...
This study was conducted to revise the taxonomic identity and clarify inter-and intra-specific re... more This study was conducted to revise the taxonomic identity and clarify inter-and intra-specific relationships among the studied wild and cultivated Hordeum taxa in Egypt. The studied taxa included Hordeum marinum subsp. gussoneanum, H. marinum subsp. marinum, H. Hordeum leporinum, Hordeum glaucum, Hordeum spontaneum and Hordeum vulgare. The results revealed that unweighted pair group method with arithmetic mean (UPGMA) dendrogram showed a considerable degree of dissimilarity among the studied Hordeum taxa at 1.50 dissimilarity distance. It divided the studied taxa into four groups
Preliminary phytochemical screening of the plant Thymus capitatus exhibited the presence of sapon... more Preliminary phytochemical screening of the plant Thymus capitatus exhibited the presence of saponins, resins, flavonoids, essential and fixed oils. Aqueous and ethanolic extracts (10-200 mg/ml) as well as saponin, resin and essential oil of the plant (10-5000 micrograms/ml inhibited the growth of several bacteria and fungi.
... hybrida seems to be highly specialized due to the fact that it contains C-glycosides, hithert... more ... hybrida seems to be highly specialized due to the fact that it contains C-glycosides, hitherto 673 674 NABIEL A. M SALEH, SALWA A. MAKSOUD, MOHAMED N. EL-HADIDI AND ... Furnaria parviflora Lam.; Gardens of Faculty of Agriculture, Giza, 4 February 1985, S. EI-Sissi. ...
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