PREMATURE SENESCENCE LEAF 50 Promotes Heat Stress Tolerance in Rice (Oryza sativa L.).
- Resource Type
- Article
- Authors
- He, Yan; Zhang, Xiaobo; Shi, Yongfeng; Xu, Xia; Li, Liangjian; Wu, Jian-Li
- Source
- Rice (19398425). 7/5/2021, Vol. 14 Issue 1, p1-7. 7p.
- Subject
- *LEAF aging
*SURVIVAL rate
*CELL death
*HYDROGEN peroxide
*FOLIAGE plants
*RICE
- Language
- ISSN
- 1939-8425
Background: Heat 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. Findings: We 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.). Conclusions: PSL50 negatively regulates heat-induced premature leaf senescence in rice. [ABSTRACT FROM AUTHOR]