ahmed.mahran

Ahmed M. Hassanein

Professor - Professor

Faculty of science

Address: Central Lab of Genetic Engineering- Faculty of Science- Sohag University

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Effect of anti-ethylene compounds on isoenzyme patterns and genome stability during long term culture of Moringa oleifera
Multiplication of _Moringa oleifera_ shoots on MS medium supplemented with 2.5 µM BAP for 3 weeks resulted in shoot vitrification which led to chlorosis, retardation of shoot formation, reduction in shoot length, necrosis of shoot tips and formation of friable calli on the base of cultured explants. Vitrification symptoms decreased when MS medium containing 2.5 µM BAP in combination with ... Read more

Shoot Regeneration and Isoenzyme Expression of Moringa oleifera L. under the influence of salt stress
Shoot regeneration and isoenzyme expression of Moringa oleifera L. under the influence of cytokinin type and different concentrations of NaCl were studied. Cotyledonary nodal segments obtained from in vitro grown seedlings (initial culture) and nodal segments obtained from their regenerants (first subculture) were subjected to shoot formation on MS medium supplemented with 0.56 mg/l BAP or KIN, for three weeks ... Read more

2017 | Keywords salicylic acid, esterase,
Differential responses of esterase isoenzyme of peanut to salinity and drought as influenced by salicylic acid
* The effect of salinity, drought and salicylic acid on growth and esterase expression of peanut * plants were studied. Seeds of peanut were able to germinate even under relatively high * concentration of NaCl (157.5 mM) or PEG (25%). In general, seedling growth was less tolerant to * salt stress than vegetative growth stage of peanut plants grown in ... Read more

2016 | Keywords micropropagation, NaCl,
Improvement of in vitro propagation of jojoba by low concentrations of NaCl or mannitol
This work was done to improve our understanding about the effect of growth regulators on micropropagation and gene expression of stress tolerant jojoba plant and how they were influenced by the presence of different stress agents. Genetic variation of plants obtained from seeds of jojoba, was checked using RAPD technique. The registered genetic variation was too high and to avoid ... Read more

2013 | Keywords Organogenesis, Tissue Culture, ,
Hormonal Requirements Trigger Different Organogenic Pathways on Tomato Nodal Explants
In this work, nodal-disk segments (4 - 6 mm in diameter × 5 - 6 mm in length) were obtained from established shoot culture, resulted from disinfected tomato seedlings, and they were suitable to induce different organogenic pathway under the influence of specific hormonal treatment. Application of BAP (1 - 2.5 mg/l) alone or in combination of 0.5 mg/l NAA ... Read more

Study of antioxidant enzymes associated different abiotic stresses during seed germination of four sorghum cultivars and their genetic relationship using RAPD and ISSR
In this work, the ability of different sorghum cultivars to germinate under the influence of different environmental conditions was investigated. Cultivars G15 and Sh305 expressed higher percentages of seed germination and seedlings growth than those of Dorado and Sh306 cultivars under the influence of relatively high temperature and concentration of PEG or NaCl. In comparison to control, extremism in temperature, ... Read more