RNase ZS1 processes UbL40 mRNAs and controls thermosensitive genic male sterility in rice

Hai Zhou, Ming Zhou, Yuanzhu Yang, Jing Li, Liya Zhu, Dagang Jiang, Jingfang Dong, Qinjian Liu, Lianfeng Gu, Lingyan Zhou, Mingji Feng, Peng Qin, Xiaochun Hu, Chengli Song, Jinfeng Shi, Xianwei Song, Erdong Ni, Xiaojin Wu, Qiyun Deng, Zhenlan Liu, Mingsheng Chen, Yao-Guang Liu, Xiaofeng Cao () and Chuxiong Zhuang ()
Additional contact information
Hai Zhou: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Ming Zhou: State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Yuanzhu Yang: State Key Laboratory of Hybrid Rice
Jing Li: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Liya Zhu: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Dagang Jiang: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Jingfang Dong: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Qinjian Liu: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Lianfeng Gu: State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Lingyan Zhou: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Mingji Feng: State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Peng Qin: Yahua Seeds Science Academy of Hunan
Xiaochun Hu: Yahua Seeds Science Academy of Hunan
Chengli Song: University of the Chinese Academy of Sciences
Jinfeng Shi: State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Xianwei Song: State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Erdong Ni: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Xiaojin Wu: State Key Laboratory of Hybrid Rice
Qiyun Deng: State Key Laboratory of Hybrid Rice
Zhenlan Liu: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Mingsheng Chen: State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Yao-Guang Liu: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
Xiaofeng Cao: State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Chuxiong Zhuang: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract Thermosensitive genic male-sterile (TGMS) lines, which are male-sterile at restrictive (high) temperatures but male-fertile at permissive (low) temperatures, have been widely used in breeding two-line hybrid rice (Oryza sativa L.). Here we find that mutation of thermosensitive genic male sterile 5 (tms5) in rice causes the TGMS trait through a loss of RNase ZS1 function. We show that RNase ZS1 processes the mRNAs of three ubiquitin fusion ribosomal protein L40 (UbL40) genes into multiple fragments in vitro and in vivo. In tms5 mutants, high temperature results in increased levels of UbL40 mRNAs. Overaccumulation of UbL40 mRNAs causes defective pollen production and male sterility. Our results uncover a novel mechanism of RNase ZS1-mediated UbL40 mRNA regulation and shows that loss of this regulation produces TGMS in rice, a finding with potential applications in hybrid crop breeding.

Date: 2014
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DOI: 10.1038/ncomms5884

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