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论文名称：
A mitochondrial pentatricopeptide repeat protein enhances cold tolerance by modulating mitochondrial superoxide in rice
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发表刊物：
Nat Commun
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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.
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第一作者：
Zu Xiaofeng,Luo Lilan
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通讯作者：
Cao Xiaofeng
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全部作者：
Wang Zhen,Gong Jie,Yang Chao,Wang Yong,Xu Chunhui,Qiao Xinhua,Deng Xian,Song Xianwei,Chen Chang,Tan Bao-Cai
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论文类型：
期刊论文
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学科门类：
理学
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一级学科：
生物学
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是否译文：
否
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发表时间：
2023-10
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收录刊物：
SCI
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发布时间：
2024-02-25
