ORIGINAL_ARTICLE
Effect of cement dust deposition on physiological behaviors of some halophytes in the salt marshes of Red Sea
Deposition effect of cement dust on pigmentation was studiedin Zygophyllum coccineum, Salsola tetrandra, Cyperus conglomeratus, Limonium axillare and Suaede vermiculata. 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 Salsola tetandra and Suaede vermiculata arethe most sensitive among them. Unless Cyperus conglomerotus, 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 Salsola tetandra and Suaeda vermiculata, 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.pdf
2012-12-01
1
11
10.21608/eajbsh.2012.17001
Halophytic species – salt marshes- Cement dust- Photosynthetic pigments
Amal
Abdel- Rahman
1
-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.
AUTHOR
Mohamed
Ibrahim
m_ibramim2004@yahoo.com
2
-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.
AUTHOR
ORIGINAL_ARTICLE
Chemical Constituents of the lichen Stereocaulon tomentosum
Aphytochemical investigation on the lichen Stereocaulontomentosum has been conducted. Three compoundsnamely Atranorin (1), Glutinol (2) and Vulpinic acid (3) wereisolated from the ethyl acetate extract of the plants. The structures of 1-3 weredetermined by NMR studies including from 1H, 13C, APT spectraldata.
https://eajbsh.journals.ekb.eg/article_17002_cadd0597e81c1771c8fbc0c4cd4c75e2.pdf
2012-12-01
13
17
10.21608/eajbsh.2012.17002
lichen Stereocaulon tomentosum
Atranorin
Glutinol
Vulpinic acid
NMR
Jamal
Nasser
1
Faculty of Science Chemistry Department
AUTHOR
Ahmed
Abu-Lhwm
2
Faculty of Science Chemistry Department
AUTHOR
Humaid
H.
3
Faculty of ScienceBiology Department, Sana'a University
AUTHOR
Gumaih
A.
4
Faculty of ScienceBiology Department, Sana'a University
AUTHOR
ORIGINAL_ARTICLE
HPLC analysis of non-enzymatic antioxidants in Azolla caroliniana (Pteridopsida) subjected to UV-B
The 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 Azolla caroliniana 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 A. caroliniana was observed after 48 h as markedly widened chloroplast area occupied by large amount of plastoglobuli in stressed fronds. Prolonged UV-B exposure of A. caroliniana 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 A. caroliniana to a certain limit against UV-B radiation.
https://eajbsh.journals.ekb.eg/article_17003_16832dd54da6bcdc1d5a2c79a3f18f52.pdf
2012-12-01
19
30
10.21608/eajbsh.2012.17003
HPLC- antioxidants- Azolla caroliniana- UV-B
E.
Mostafa
1
Botany and Microbiology Department, Faculty of Science, Alexandria University, 21511, Alexandria, Egypt
AUTHOR
M.
Ibrahim
2
Botany and Microbiology Department, Faculty of Science, Alexandria University, 21511, Alexandria, Egypt
AUTHOR
ORIGINAL_ARTICLE
Biochemical characterization and variability of Egyptian new hybrids of Capsicum L.
Six Egyptian new hybrids belonging to two species of Capsicum 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 C. frutescens and three in kotof 2 of C. annuum. 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.pdf
2012-12-01
31
39
10.21608/eajbsh.2012.17004
Capsicum
biochemical variability
SDS-PAGE
Isozyme
dendrogram
Shawkat
Ahmed
1
Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, Roxy, Heliopolis, P.C.11341, Cairo, Egypt
AUTHOR
ORIGINAL_ARTICLE
Biodegradation of Agricultural Plant Residues by Some Fungi Isolated From Yemen
Forty 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°C.
There are 29 species and one variety belonging to 12 fungal genera are obtained from the samples, of which Alternaria (3 species), Aspergillus (5 species), Penicillium (6 species), Mucor (2 species) and one variety, Fusarium (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.
A. fumigatus followed by A. terreus var. aureus, then P. griseofulvum are the active cellulase producers. Whereas P. glabrum is active producer of pectinlyase (PL), while Acremonium strictum and P. chrysogenum appeared to be good polygalacturonase (PG) producers.
https://eajbsh.journals.ekb.eg/article_17005_7a7842b1faa3b570c2831b723d8dae42.pdf
2012-12-01
41
51
10.21608/eajbsh.2012.17005
Cellulase
pectin lyase (PL)
polygalacturonase (PG) and biodegradation
Abdullah
Al-Mahdi
1
Biology Department, Faculty of Science, Sana’a University, Yemen
AUTHOR
Ahmed
Mahmoud
2
Biology Department, Faculty of Science, Sana’a University, Yemen
AUTHOR
Hala
Al-Jebouri
3
Biology Department, Faculty of Science, Sana’a University, Yemen
AUTHOR