PREMATURE SENESCENCE LEAF 50 Promotes Heat Stress Tolerance in Rice (Oryza sativa L.)

Abstract Background Heat stress is a major environmental factor that could induce premature leaf senescence in plants. So far, few rice senescent mutants have been reported to involve heat tolerance. Findings We identified 50 ( psl50 ) mutant exhibited higher susceptibility with decreased survival rate, over-accumulated hydrogen peroxide (H 2 O content and increased cell death under compared the wild-type. The causal gene PREMATURE SENESCENCE LEAF PSL50 was isolated by using initial map-based resequencing (IMBR) approach, we found promoted tolerance probably acting as modulator of H signaling response Oryza sativa L.). Conclusions negatively regulates heat-induced rice.