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  • Mitigation of adverse effects of salinity stress on sunflower plant (Helianthus annuus L.) by exogenous application of chitosan

    • Authors: Bakhoum, Gehan Shaker;  Advisor: -;  Participants: Sadak, Mervat Shamoon; Badr, Elham Abd El Moneim (2020)

  • The obtained results showed that salt stress with 4000 mg/L recorded the highest values of all the studied growth characters, photosynthetic pigments, some physiological aspects, seed yield/plant and oil %. On the other hand, the highest values of head diameter, head circumference, weight 50 seed and crude protein were obtained by control treatment. Meanwhile, the highest values of proline and free amino acid were recorded under higher salinity level (8000 mg/L). On the other hand, all chitosan treatments significantly enhanced growth and productivity of sunflower plant. Also, the obtained data that, chitosan concentration (50 mg/L) recorded the highest values of all the studied growt...
  • BB

  • Role of melatonin in improving growth, yield quantity and quality of Moringa oleifera L. plant under drought stress

    • Authors: Sadak, Mervat Sh.;  Advisor: -;  Participants: Abdalla, Aboelfetoh M.; Abd Elhamid, Ebtihal M.; Ezzo, M. I. (2020)

  • Subjecting M. oleifera plant to drought stress caused significant decreases in growth, photosynthetic pigment, indole acetic acid (IAA), element contents, yield, and yield attributes, meanwhile increased lipid peroxidation is expressed as malondialdehyde (MDA) and various antioxidant enzymes as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POX). On the other hand, foliar treatment with different concentrations of melatonin significantly increased growth parameters, yield quantity, and quality of M. oleifera plant at normal and drought-stressed conditions via improving photosynthetic pigments (IAA), phenolic and element contents, and antioxidant enzyme systems, whereas de...