Melatonin Promotes Rice Seed Germination under Drought Stress by Regulating Antioxidant Capacity

Drought stress is a serious threat to the germination of plant seeds and growth seedlings. Melatonin has been proven play an important role in alleviating stress. However, its effect on seed under drought conditions still poorly understood. Therefore, we studied effects melatonin rice physiological characteristics Rice were treated with different concentrations (i.e., 0, 20, 100, 500 μM) was simulated 5% polyethylene glycol 6000 (PEG6000). The results showed that 100 μM can effectively improve potential, rate index; vigor index seeds; length shoot root. In addition, treatment also increased activity superoxide dismutase (SOD), peroxidase (POD) catalase (CAT), reduced content malondialdehyde (MDA). grey relational grade between MDA seed-soaking highest, which could be useful for evaluating tolerance. Two-way analysis variance single more significant than interaction (p < 0.05). subordinate function significantly improved indexes alleviated adverse helped understanding morphological involvement promoting seedling development