A mitochondrial pentatricopeptide repeat protein enhances cold tolerance by modulating mitochondrial superoxide in rice
文献类型： 外文期刊
作者： Zu, Xiaofeng 1 ; Luo, Lilan 1 ; Wang, Zhen 1 ; Gong, Jie 1 ; Yang, Chao 1 ; Wang, Yong 4 ; Xu, Chunhui 4 ; Qiao, Xinhua 5 ; Deng, Xian 1 ; Song, Xianwei 1 ; Chen, Chang 5 ; Tan, Bao-Cai 4 ; Cao, Xiaofeng 1 ;
作者机构： 1.Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Genom, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Inst Genet & Dev Biol, Natl Ctr Plant Gene Res, Beijing 100101, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Inst Hybrid Wheat, Municipal Key Lab Mol Genet Hybrid Wheat, Beijing 100097, Peoples R China
4.Shandong Univ, Sch Life Sci, Key Lab Plant Dev & Environm Adaptat Biol, Minist Educ, Qingdao 266237, Peoples R China
5.Chinese Acad Sci, Inst Biophys, CAS Ctr Excellence Biomacromolecules, Natl Lab Biomacromolecules, Beijing 100101, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.Chinese Acad Sci, CAS Ctr Excellence Mol Plant Sci, Beijing 100101, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：16.6； 五年影响因子：17.0 ）
ISSN：
年卷期： 2023 年 14 卷 1 期
页码：
收录情况： SCI
摘要： Cold stress affects rice growth and productivity. Defects in the plastid-localized pseudouridine synthase OsPUS1 affect chloroplast ribosome biogenesis, leading to low-temperature albino seedlings and accumulation of reactive oxygen species (ROS). Here, we report an ospus1-1 suppressor, sop10. SOP10 encodes a mitochondria-localized pentatricopeptide repeat protein. Mutations in SOP10 impair intron splicing of the nad4 and nad5 transcripts and decrease RNA editing efficiency of the nad2, nad6, and rps4 transcripts, resulting in deficiencies in mitochondrial complex I, thus decrease ROS generation and rescuing the albino phenotype. Overexpression of different compartment-localized superoxide dismutases (SOD) genes in ospus1-1 reverses the ROS over-accumulation and albino phenotypes to various degrees, with Mn-SOD reversing the best. Mutation of SOP10 in indica rice varieties enhances cold tolerance with lower ROS levels. We find that the mitochondrial superoxide plays a key role in rice cold responses, and identify a mitochondrial superoxide modulating factor, informing efforts to improve rice cold tolerance. Cold stress hampers rice growth and yield. This paper demonstrates that mitochondrial superoxide plays a key role in cold responses, and identifies a pentatricopeptide repeat protein which modulates mitochondrial superoxide and rice cold tolerance.
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