الفهرس | Only 14 pages are availabe for public view |
Abstract This study aimed to study how to increase the adaptation of tomato plants to grow at hot weather conditions of summer seasons. The plants in the nurse were subjected either to drought conditions by prohibiting water or by irrigation it with saline water as the concentration of 100 mM. After transplanting, plants were foliar sprayed by Purshade or Prolina at 5, 10 cm3/L. Data recorded were relevant to vegetative growth, flowering and fruit setting, chemical composition of different plant parts as well as fruit quality and fruit yield. Results could be summarized as follows: 1-Growth 1.1. Root length: Drought and saline water irrigation positively affected root length. Purshade and prolina spraying showed, in general, significant increase in root length. 1.2. plant height: Drought treatments generally gave the highest plant height. Purshade at both tested concentrations achieved the highest plant height. 1.3. Number of leaves: Both saline water irrigation or exposing transplants to drought gave superior records in number of leaves. Prolina and purshade exerted, in general, significant increase in number of leaves. 131 Summary 1.4. Number of branches: Drought and salinity reduced plant height and thus encouraged the branching of plants. Purshade at both tested concentrations showed superior records. 1.5. Leaves fresh and dry weights: Drought and saline water irrigation gave the highest leaves fresh and dry weights. Prolina at the lowest concentration and purshade at the highest concentration gave the highest record in leaves fresh and dry weights. 1.6. Branches fresh and dry weights: Saline water irrigation of plants in the nurse exhibited superior records in branches fresh and dry weights. Purshade at both studied concentrations and prolina at the lowest concentration attained superior records in both fresh and dry weights. 1.7. Roots fresh and dry weights: Drought treatments at first sampling date of the first season and saline water at the two studied seasons achieved superior records in fresh and dry weights. Purshade and prolina at both concentrations achieved superior record in fresh and dry weight. 1.8. Total plants fresh and dry weights: Saline water irrigation and drought gave plants with the highest plant dry weight. Purshade at the highest concentration and 132 Summary prolina at the lowest concentration gave the highest record in both fresh and dry weights. |