Effects of Mycorrhizal Symbiosism on some physiological characters of Sesbania aculeta against water deficient stress

Drought is one of the most important abiotic stress and major limiting environmental factors for plant development and plant production. A plant defense reaction against water deficient is a complex endeavor. This experiment was conducted to investigate effects of mycorrhiza symbiosis on nitrogen and phosphorus absorption, nitrate reductase activity of root and protein content in seed, prolin content of root and carbohydrate of leaf and stem in Sesbania aculeta under drought stress. This study was carried out in Randomized Completely Block Design (RCBD) with three replications in green house conditions. Treatments were three levels of drought stress (location) and two levels of mycorrhiza, M0 (without fungi) and M1 (with fungi). Results showed that Protein content of seed and nitrate reductase activity in root of mycorrhizal symbiosis in comparison with non-mycorrhizal symbiosis plants were increased significantly in arrangement about 11% and 4%. Also there were no significant differences between phosphorous and nitrogen content in root of mycorrhizal plants in comparison with non-mycorrhizal plants. During growth, flowering and filling seed, mycorrhizal symbiosis showed significantly difference in prolin content of root. Also in flowering stage, soluble carbohydrate of leaf and stem in mycorrhizal symbiosis plant were significantly higher than control (p<0.05).