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

Rice

Jian-Li Wu¹  Xia Xu¹  Liangjian Li¹  Yan He¹  Yongfeng Shi¹  Xiaobo Zhang¹ 

[1] State Key Laboratory of Rice Biology, China National Rice Research Institute, 310006, Hangzhou, China;

关键词: Rice;    Senescence;    IMBR;    Heat tolerance;    Hydrogen peroxide;   

DOI  :  10.1186/s12284-021-00493-w

来源: Springer

【 摘 要 】

BackgroundHeat stress is a major environmental factor that could induce premature leaf senescence in plants. So far, a few rice premature senescent leaf mutants have been reported to involve in heat tolerance.FindingsWe identified a premature senescence leaf 50 (psl50) mutant that exhibited a higher heat susceptibility with decreased survival rate, over-accumulated hydrogen peroxide (H2O2) content and increased cell death under heat stress compared with the wild-type. The causal gene PREMATURE SENESCENCE LEAF 50 (PSL50) was isolated by using initial map-based resequencing (IMBR) approach, and we found that PSL50 promoted heat tolerance probably by acting as a modulator of H2O2 signaling in response to heat stress in rice (Oryza sativa L.).ConclusionsPSL50 negatively regulates heat-induced premature leaf senescence in rice.

【 授权许可】

CC BY