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A mitochondrial pentatricopeptide repeat protein enhances cold tolerance by modulating mitochondrial superoxide in rice

Author

Listed:
  • Xiaofeng Zu

    (Chinese Academy of Sciences)

  • Lilan Luo

    (Chinese Academy of Sciences)

  • Zhen Wang

    (Chinese Academy of Sciences)

  • Jie Gong

    (Chinese Academy of Sciences
    Beijing Academy of Agriculture and Forestry Sciences)

  • Chao Yang

    (Chinese Academy of Sciences)

  • Yong Wang

    (Shandong University)

  • Chunhui Xu

    (Shandong University)

  • Xinhua Qiao

    (Chinese Academy of Sciences)

  • Xian Deng

    (Chinese Academy of Sciences)

  • Xianwei Song

    (Chinese Academy of Sciences)

  • Chang Chen

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Bao-Cai Tan

    (Shandong University)

  • Xiaofeng Cao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Chinese Academy of Sciences)

Abstract

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.

Suggested Citation

  • Xiaofeng Zu & Lilan Luo & Zhen Wang & Jie Gong & Chao Yang & Yong Wang & Chunhui Xu & Xinhua Qiao & Xian Deng & Xianwei Song & Chang Chen & Bao-Cai Tan & Xiaofeng Cao, 2023. "A mitochondrial pentatricopeptide repeat protein enhances cold tolerance by modulating mitochondrial superoxide in rice," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42269-4
    DOI: 10.1038/s41467-023-42269-4
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    References listed on IDEAS

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    1. Ping Yin & Quanxiu Li & Chuangye Yan & Ying Liu & Junjie Liu & Feng Yu & Zheng Wang & Jiafu Long & Jianhua He & Hong-Wei Wang & Jiawei Wang & Jian-Kang Zhu & Yigong Shi & Nieng Yan, 2013. "Structural basis for the modular recognition of single-stranded RNA by PPR proteins," Nature, Nature, vol. 504(7478), pages 168-171, December.
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