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Articles by Mona Gergis Dawood
Total Records ( 3 ) for Mona Gergis Dawood
  Mona Gergis Dawood , Kowther Gad Ali El-Rorkiek , Mohamed El-Sayed El-Awadi and Mervat Shamon Sadak
  Background and Objective: A worldwide effort to reduce the amount of chemical substances used in crop production by introducing modern biological methods. One of the possible solutions is allelopathy that involves both inhibitory and stimulatory biochemical interactions between plants. So, this work aimed to study the physiological effect of aqueous seed extract of fenugreek on productivity and grain quality of wheat plant. Materials and Methods: A field experiment was carried out at the experimental station of National Research Centre, Nubaria district El-Behera Governorate, Egypt, during two winter seasons of 2016/2017 and 2017/2018 to investigate the physiological effect of aqueous seed extract of fenugreek (5, 10 and 15%) on two wheat cultivars (Gimeza 7 and Sakha 94) grown under sandy soil conditions. Results: All aqueous seed extract of fenugreek (5, 10 and 15%) showed significant positive effect on growth parameters, photosynthetic pigments, grains yield, yield components and some biochemical constituents of the yielded grains of both wheat cultivars. The results revealed that 10% aqueous seed extract of fenugreek caused the maximum significant increases in the most of investigated parameters. Since, 10% aqueous extract of fenugreek significantly increased total photosynthetic pigments by 32.10% in Gimeza 7 cv. (cultivar) and by 33.42% in Sakha 94 cv. and increased grains yield of Gimeza 7 cv. by 36.36% and Sakha 94 cv. by 28.73%. Conclusion: Aqueous extract of fenugreek seed could be used in improving performance of wheat plant grown under sandy soil condition.
  Mona Gergis Dawood , Mohamed El-Sayed El-Awadi , Mervat Shamoon Sadak and Safaa Reda El-Lethy
  Background and Objective: The adverse effects of drought can be mitigated by application of natural plant extracts as carrot root or antioxidants as β-carotene. Carrot root is characterized by high nutritional value and rich with bioactive constituents and antioxidants (phenolic compounds and carotenoids). This work aimed to compare between the physiological role of carrot root extract (5 and 10%) and β-carotene (25 and 50 mM) as seed soaking in inducing drought tolerance of sunflower plant (Giza 102 cultivar). Materials and Methods: Two pot experiments were conducted during two successive summer seasons (2015 and 2016) at wire house of National Research Centre, Egypt. The sterilized seeds were divided into three groups, the first group was soaked with distilled water, while second and third groups were soaked for 12 h with different concentrations of carrot root extract (5 and 10%) and β-carotene (25 and 50 mM). Results: Data showed that drought stress (50% FC) decreased quality and quantity of sunflower plants. Meanwhile carrot root extract and β-carotene mitigate the adverse effects of drought and induce plant tolerance through enhancement plant growth regulators; photosynthetic pigments; antioxidant enzymes; IAA; phenolic compound; osmolytes (TSS; proline, free amino acids); seed yield and seed composition as protein and oil content. Conclusion: Carrot root extract treatments were more pronounced than β-carotene treatments. Worthy, 10% carrot root extract was the most pronounced treatment in increasing drought tolerance of sunflower plant.
  Mohamed El-Sayed El-Awadi , Mervat Shamon Sadak , Kowther Gad Ali El-Rorkiek and Mona Gergis Dawood
  Background and Objective: Wheat is one of the most important cereal crops grown in the world. The main amino acids synthesized by plants are glutamic acid and aspartic acid and from these two amino acids, the other amino acid may be formed. This study aimed to investigate the physiological role of aspartic acid in improving quality and productivity of two wheat cultivars grown under sandy soil conditions. Materials and Methods: A field experiment was carried out at the experimental Station of National Research Centre, Nubaria district, El-Behrea Governorate-Egypt, during two winter seasons of 2016/2017 and 2017/2018. Wheat grains cultivars (Benisuif 4 and Sohag 3) were obtained from Agricultural Research Centre Giza, Egypt. The experimental design was complete randomized block design with four replications. Foliar application of aspartic acid (0, 50, 75 and 100 mg L1) was carried out twice, plants were sprayed after 45 and 60 days from sowing. Results: It was noted that Benisuif 4 cv. was characterized by higher significant growth parameters, photosynthetic pigments, grains, straw and biological yield than Sohag 3 cv. when grown under sandy soil conditions. Aspartic acid treatments (50, 75 and 100 mg L1) caused marked significant increases in all growth parameters under investigation, photosynthetic pigments, yield and yield components, quality of the yielded grains (carbohydrate, protein, N, P, K contents) in both wheat cultivars. It is worthy to mention that 75 mg L1 was the most pronounced treatment in increasing quality and productivity of two wheat cultivars grown under sandy soil conditions. Conclusion: It was concluded that aspartic acid treatments (50, 75 and 100 mg L1) increased quality and quantity of two wheat cultivars grown under sandy soil conditions, especially 75 mg L1 was the most pronounced treatment.
 
 
 
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