The Role of Arginin and Uric Acid on Portulaca Grandiflora Growth under Saline Conditions.
Keywords:
Portulaca grandiflora, salinity alginine, uric acid, ascorbic acid and stress tolerate.Abstract
Seeds of Portulaca grandiflora were soaked in distilled water, NaCl or NaCl with uric acid or arginine or in one of the amino acids. Treatment of seeds of Portulaca grandiflora with arginine and uric acid under saline conditions increased the percent of seed germination from 55% to 80%. Incorporation of these amino acids in the nutrient medium also significantly enhanced the dry weights as well as the contents of chlorophyll and ascorbic acid in the seedlings. Levels of both total amino acids and proline were higher in salinized than in non-salinized plants. The results strongly suggest that incorporation of exogenous amino acids in seeds and seedlings of P.grandifora helps to alleviate salt stress in the species.
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