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| 1 | LSL1 controls cell death and grain production by stabilizing chloroplast in rice显示文摘Lesion mutants can be valuable tools to reveal the interactions between genetic factors and environmental signals and to improve grain production.Here we identified a rice(Oryza sativa)mutant,lesion spotleaf1(lsl1),which produces necrotic leaf lesions throughout its life cycle.LSL1 encodes a protein of unknown function and belongs to a grass-specific clade.The lesion phenotype of the lsl1 mutant was sharply induced by shading,and its detached leaves incubated in 6-benzylamino purine similarly formed lesions in the dark.In addition,the lsl1 mutant exhibited reactive oxygen species accumulation and cell death.The terminal deoxynucleotidyl transferase d UTP nick end-labeling(TUNEL)and comet assays revealed that the lsl1 mutant contained severe DNA damage,resulting in reduced grain yield and quality.RNA sequencing,gene expression,and protein activity analyses indicate that LSL1 is required for chloroplast function.Furthermore,LSL1 interacts with Psa D and PAP10 to form a regulatory module that functions in chlorophyll synthesis and chloroplast development to maintain redox balance.Our results reveal that LSL1 maintains chloroplast structure,redox homeostasis,and DNA stability,and plays important roles in the interaction between genetic factors and environmental signals and in regulating grain size and quality. | Deyong Ren Wei Xie Qiankun Xu Jiang Hu Li Zhu Guangheng Zhang Dali Zeng Qian Qian | 2022 | Science China(Life Sciences)2022，65，11： | 0 |
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