Egyptian Society of Biological SciencesEgyptian Academic Journal of Biological Sciences, H. Botany2090-38123120121201Effect of cement dust deposition on physiological behaviors of some halophytes in the salt marshes of Red Sea1111700110.21608/eajbsh.2012.17001ENAmal M.Abdel- Rahman-Alexandria University, Faculty of Science- Botany and Microbiology department P.O. Box. 21511; Alexandria. EGYPT
-Umm Al Qura University, Faculty of Education for Girls, Makkah, K.S.A.Mohamed M.Ibrahim-Alexandria University, Faculty of Science- Botany and Microbiology department P.O. Box. 21511; Alexandria. EGYPT
-King Saud University, Teachers College; Science department; P.O. Box 4341 Riyadh 11491, K.S.A.Journal Article20181020Deposition effect of cement dust on pigmentation was studiedin <em>Zygophyllum coccineum</em>, <em>Salsola tetrandra</em>, <em>Cyperus conglomeratus</em>, <em>Limonium axillare</em> and <em>Suaede vermiculata</em>. Measurements were taken for plants in two cites , one close to early constructed cement factory at (Jeddah, Saudi Arabia) about 500 meters and other one far from the factory about 5 kilometers. The rate of mortality of young branches were high in the area subjected to the cement dust in all five species, whereas <em>Salsola tetandra </em>and <em>Suaede vermiculata </em>arethe most sensitive among them. Unless <em>Cyperus conglomerotus</em>, It is noted that amount of chl a, b and carotenoids in all investigated plants that are far away from cement dust more than that near from the factory. Carbohydrates and protein contents are significantly decreased in non polluted<em> Salsola tetandra </em>and<em> Suaeda vermiculata</em>, whereas these parameters increased significantly parallel to the dust accumulation rate on plants near to the factory. In general, pollution by the cement dust has caused adverse effects on the photosynthetic pigments, the pH of the cell sap, metabolism of soluble amino acids and soluble sugars.https://eajbsh.journals.ekb.eg/article_17001_6fff5c3e9838ac69b6c284995eaba9dd.pdfEgyptian Society of Biological SciencesEgyptian Academic Journal of Biological Sciences, H. Botany2090-38123120121201Chemical Constituents of the lichen Stereocaulon tomentosum13171700210.21608/eajbsh.2012.17002ENJamal A.NasserFaculty of Science Chemistry DepartmentAhmed A.Abu-LhwmFaculty of Science Chemistry DepartmentHumaid A.A.H.Faculty of ScienceBiology Department, Sana'a UniversityGumaih H.S.A.Faculty of ScienceBiology Department, Sana'a UniversityJournal Article20181020<strong>A<br />phytochemical investigation on the lichen </strong><strong><em>Stereocaulon<br />tomentosum</em></strong><strong> has been conducted. Three compounds<br />namely Atranorin (1), Glutinol (2) and Vulpinic acid (3) were<br />isolated from the ethyl acetate extract of the plants. The structures of 1-3 were<br />determined by NMR studies including from <sup>1</sup>H, <sup>13</sup>C, APT spectral<br />data. </strong>https://eajbsh.journals.ekb.eg/article_17002_cadd0597e81c1771c8fbc0c4cd4c75e2.pdfEgyptian Society of Biological SciencesEgyptian Academic Journal of Biological Sciences, H. Botany2090-38123120121201HPLC analysis of non-enzymatic antioxidants in Azolla caroliniana (Pteridopsida) subjected to UV-B19301700310.21608/eajbsh.2012.17003ENE. M.MostafaBotany and Microbiology Department, Faculty of Science, Alexandria University, 21511, Alexandria, EgyptM. M.IbrahimBotany and Microbiology Department, Faculty of Science, Alexandria University, 21511, Alexandria, EgyptJournal Article20181020The ultrastructure of chloroplast and quantified antioxidant compounds such as α-tocopherol, ascorbic acid and beta carotene, semi quantitatively by comparing the peak areas of HPLC chromatograms, were affected considerably in response to exposure of <em>Azolla caroliniana</em> to UV-B radiation for 24 and 48 h. The results show that the most striking effect of the enhanced UV-B treatment on the ultrastructure of <em>A. caroliniana</em> was observed after 48 h as markedly widened chloroplast area occupied by large amount of plastoglobuli in stressed fronds. Prolonged UV-B exposure of <em>A. caroliniana</em> for 48 h resulted in a reduction in peaks area for for α-tocopherol, ascorbic acid and beta-carotene. The results show that changes in the chromatogram of non-enzymatic antioxidants were correlated with the duration of exposure to UV-B radiation. These antioxidant metabolites play a vital role in protecting <em>A. caroliniana</em> to a certain limit against UV-B radiation. <em> </em>https://eajbsh.journals.ekb.eg/article_17003_16832dd54da6bcdc1d5a2c79a3f18f52.pdfEgyptian Society of Biological SciencesEgyptian Academic Journal of Biological Sciences, H. Botany2090-38123120121201Biochemical characterization and variability of Egyptian new hybrids of Capsicum L.31391700410.21608/eajbsh.2012.17004ENShawkat MahmoudAhmedBiological and Geological Sciences Department, Faculty of Education, Ain Shams University, Roxy, Heliopolis, P.C.11341, Cairo, EgyptJournal Article20181020Six Egyptian new hybrids belonging to two species of <em>Capsicum</em> L. were analyzed using biochemical markers. Low polymorphism percentage (38%) was recorded in the SDS-PAGE pattern. Two species-specific, one for each species, were scored and could be used as biochemical markers. Eight-isozyme systems produced 21 bands, among them only three patterns; alcohol dehydrogenase, malic enzyme and malate dehydrogenase, recorded polymorphism percentages ranged between 57 to 80%. Five characterized unique bands were detected; two in yoser 4 of <em>C. frutescens</em> and three in kotof 2 of <em>C. annuum.</em> The UPGMA dendrogram revealed low genetic variability of the six hybrids that separated into two main clusters with genetic distance of 0.25.https://eajbsh.journals.ekb.eg/article_17004_c54f3df7d1d5a08b8bcffb4f0bef71e5.pdfEgyptian Society of Biological SciencesEgyptian Academic Journal of Biological Sciences, H. Botany2090-38123120121201Biodegradation of Agricultural Plant Residues by Some Fungi Isolated From Yemen41511700510.21608/eajbsh.2012.17005ENAbdullah Y.Al-MahdiBiology Department, Faculty of Science, Sana’a University, YemenAhmed L. E.MahmoudBiology Department, Faculty of Science, Sana’a University, YemenHala J.Al-JebouriBiology Department, Faculty of Science, Sana’a University, YemenJournal Article20181020Forty eight samples of different plant residues (250g each) are collected from 9 different provinces in Yemen during 2008, which are corn, wheat, barley and cabbage residues. The samples are mycological analyzed on Czapek’s agar medium at 28 ± 1<sup>°</sup>C.
There are 29 species and one variety belonging to 12 fungal genera are obtained from the samples, of which <em>Alternaria </em>(3 species), <em>Aspergillus </em>(5 species), <em>Penicillium </em>(6 species), <em>Mucor </em>(2 species) and one variety, <em>Fusarium </em>(5 species) contributed the broadest spectra of fungal species.
The ability of 58 fungal isolates representing 29 species and one variety related to 12 genera to produce extracellular plant cell wall degrading enzymes (cellulase, pectin lyase and polygalacturonase) on solid media is tested. Results reviled that most of the tested fungal isolates are able to produce cellulase, whereas a relatively few number of them are able to produce pectinases with variable capabilities.
<em>A. fumigatus</em> followed by <em>A. terreus </em>var.<em> aureus</em>, then <em>P. griseofulvum </em>are the active cellulase producers. Whereas <em>P. glabrum </em>is active producer of pectinlyase (PL), while <em>Acremonium strictum </em>and <em>P. chrysogenum </em>appeared to be good polygalacturonase (PG) producers.https://eajbsh.journals.ekb.eg/article_17005_7a7842b1faa3b570c2831b723d8dae42.pdf