Behavioral Study of Morphological Morphophysiological and Productivity Characteristics in (Lathyrus sativus L). under Salt Stress Conditions

The experiment was conducted. in the greenhouse of the Faculty of Agricultural Engineering - Tishreen University - Latakia during the agricultural season 2022-2023 by planting seeds of four genetic – environmental genotypes of the Lathyrus sativus L. Jalapeno (Latakani, Tartousi, Homsi, and Shami) in plastic bags with a capacity of (5 kg) soil These bags were distributed according to Complete randomization design at a rate of three replicates for each treatment. The research aimed to evaluate the behavior of some morphological, morphysiological and productive traits of the studied Jalapeno genotypes under different levels of salinity of irrigation water with sodium chloride (0, 3, 6, 10 and 15 mmho/cm) in order to determine the most effective salinity levels and the most tolerant genotype for future use in breeding programmes or cultivate it in lands affected by salinity. The results indicated a significant decrease (P<0.05) in the values of all studied traits, and increasingly proportional to the salt concentrations used (3, 6, 10, 15 mmho/cm). The Jalapeno Homsi genotype was superior in control conditions and under conditions of salt stress, especially high levels (10 and 15 mmho/cm), significantly (P<0.05) in most of the studied traits compared to the rest of the genotypes. The results also showed that the largest percentage decrease under the applied salinity levels was primarily noticeable in the characteristics of the leaf surface area of the plant in the Tartousi genotype (5.07) (cm2/plant) at the concentration (15 mmho/cm), number of branches (branch/plant) In the Tartousi genotype (2.33 branches) at the concentration (15 mmho/cm), and the seed weight in the Tartousi and Shami genotypes (1 g) at the concentration (15 mmho/cm), which indicates the possibility of using it in screening the genotypess’ tolerance to salt stress. The research concluded with the proposal to grow the Jalapeno Homsi genotype under control conditions, and under salinity conditions, whether low levels (3 mmho/cm) or high levels exceeding (10 mmho/cm), due to its superiority in most of the morphological, morphophysiological, and production traits studied.