Hydrogen Sulfide Regulates Salt Tolerance in Rice by Maintaining Na(+)/K(+) Balance, Mineral Homeostasis and Oxidative Metabolism Under Excessive Salt Stress.

摘要: Being a salt sensitive crop, rice growth and development are frequently affected by soil salinity. Hydrogen sulfide (H2S) has been recently explored as an important priming agent regulating diverse physiological processes of plant development. Despite its enormous prospects in systems, the role H2S stress tolerance is still elusive. Here, combined pharmacological, biochemical approach was executed aiming to examine possible mechanism enhancement rice. We show that pretreating plants with donor sodium bisulfide (NaHS) clearly improved, but application scavenger hypotaurine NaHS decreased biomass-related parameters under stress. NaHS-pretreated salt-stressed exhibited increased chlorophyll, carotenoid soluble protein contents, well suppressed accumulation reactive oxygen species (ROS), contributing oxidative damage protection. The protective against correlated elevated levels ascorbic acid, glutathione, redox states, enhanced activities ROS- methylglyoxal-detoxifying enzymes. Notably, uptake Na+, Na+/K+ ratio balanced mineral contents indicated ion homeostasis Altogether, our results highlight modulation level endogenous genetically or exogenously could be employed attain better rice, perhaps other crops, Furthermore, study reveals importance implication gasotransmitter like for management stress, thus assisting adapt adverse environmental changes.