Melatonin-Induced Resilience Strategies against the Damaging Impacts of Drought Stress in Rice

Drought is a severe abiotic stress that imposes serious threat to rice productivity. Although previous studies have found melatonin can promote seed germination, the physiological regulation mechanism of drought tolerance in germination mediated by exogenous still unclear. In order overcome these challenges, polyethylene glycol 6000 (PEG6000) at concentrations 20% and 35% was used simulate osmotic stress. Rice seeds were treated with different (i.e., 0, 20, 100, 500 μM) study effects on characteristics, growth development, superoxide dismutase (SOD) activity, peroxidase (POD) catalase (CAT) malondialdehyde (MDA) content, soluble protein content. The results showed soaking treatment using concentration 100 μM under effectively promoted rate improved biomass shoots roots. Meanwhile, this reduced MDA content alleviate oxidative damage caused two-way ANOVA effect single more significant than interaction (p < 0.05). Using membership function method, it shown critical gradient 35%, interactive + μM. Through grey correlation analysis, (7 d) had highest evaluate mitigation This provides theoretical basis for light simple cultivation technology dry direct seeding rice.