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Articles by Ebtihal M. Abd Elhamid
Total Records ( 2 ) for Ebtihal M. Abd Elhamid
  Ebtihal M. Abd Elhamid , Mervat Sh. Sadak , M.I. Ezzo and Aboelfetoh M. Abdalla
  Background and Objective: Glycine Betaine (GB) is one of the best powerful compatible solutes that save plants from abiotic stresses like drought. External treatment of GB is well known to regulate a myriad of physiological and biochemical processes in plants subjected to stress like drought. This research attempted to evaluate the effect of external treatment of Glycine Betaine (GB) on growth, photosynthetic pigments, endogenous Indole Acetic Acid (IAA), some osmoprotectants, yield quantity and quality, in the favour of total carbohydrates, proteins and antioxidant compounds in the yielded plants grown under normal as well as under drought-stressed conditions. Materials and Methods: A field experiment was carried out during two successive seasons in the Experimental Station of National Research Centre, Nubaria district, Beheira Governorate, Egypt. Moringa oleifera plants were treated with Glycine Betaine (GB) (10, 20 and 30 mM). Results: Water deficit significantly decreased Moringa oleifera growth and yield quantity and quality through decreasing photosynthetic pigments and IAA, accompanied by significant increases in some osmoprotectants and phenolics contents. Meanwhile, Different GB concentrations enhanced growth parameters and yield and its components via enhancing photosynthetic pigments, IAA, proline, TSS and free amino acids in Moringa oleifera plants under normal or drought stress conditions. In general, 20 mM GB was the most effective treatment in ameliorating the reduced effect of drought stress on Moringa oleifera plants. Conclusion: Finally, it can conclude that using different concentrations of GB as foliar treatment not only improved the growth and yield of Moringa oleifera plants under normal irrigation conditions but also, could ameliorate the decreased effect of drought on Moringa oleifera plants.
  M.M. Tawfik , Elham A. Badr , O.M. Ibrahim , Ebtihal M. Abd Elhamid and Mervat Sh. Sadak
  Background and Objective: Salinity is a serious agro-environmental problem which limiting plant growth and productivity especially in arid and semi-arid regions of the world. Most of the developing countries suffer from shortage of cultivated area and lack of water resources as well as increasing salinity of agricultural land as a result of climate changes. So growing non-traditional crops such as halophytic plants is a promising solution to solve problems of saline habitats. Methodology: For this concern, two field experiments were carried out during 2014 and 2015 seasons at the Model Farm of National Research Centre, El Tour, South Sinai to study the impact of organic fertilization with farmyard manure (5 t fed–1), chicken manure (5 t fed–1) and foliar application with KNO3 (2%), Zn-EDTA (100 ppm) as well as their interaction on biomass production, biochemical composition of Spartina patens. Results: Organic treatment (chicken manure 5 t fed–1) significantly increase the fresh weight of different cuttings, total productivity, chlorophyll a+b, crude protein, potassium content and K/Na ratio compared with control treatment or with farmyard manure. On the other hand, organic treatment (Farmyard manure or chicken manure) decreased the contents of soluble carbohydrates, sodium, calcium and proline as well as succulence, osmotic potential values and Ca/Na ratio. Foliar spraying with KNO3 significantly increase fresh weight of different cuttings, total productivity, chlorophyll a+b, crude protein, potassium content and K/Na ratio compared with tap water or Zn-EDTA. Meanwhile foliar spray with tap water significantly increase the contents of soluble carbohydrates percentage, sodium, calcium and proline as well as the values of succulence, osmotic potential and Ca/Na ratio. As for the interaction effect between organic treatment and foliar treatment, data show that, the highest values of fresh weight cuttings, total productivity, chlorophyll a+b, crude protein percentage, potassium content and K/Na ratio were recorded in plants fertilized with chicken manure (5 t fed–1) and sprayed with 2% KNO3. Furthermore, plants sprayed with tap water without organic manure produced the highest content soluble carbohydrates percentage, sodium, calcium and proline as well as succulence and osmotic potential. Conclusion: It can be recommended the applications of both organic fertilizer (5 t fed–1) and foliar spray with K+ and Zn-EDTA under saline sandy soil conditions.
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