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Natural variation in PTB1 regulates rice seed setting rate by controlling pollen tube growth

Author

Listed:
  • Shuangcheng Li

    (Rice Research Institute, Sichuan Agricultural University
    State Key Laboratory of Hybrid Rice, Sichuan Agricultural University
    Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education)

  • Wenbo Li

    (Rice Research Institute, Sichuan Agricultural University)

  • Bin Huang

    (Rice Research Institute, Sichuan Agricultural University)

  • Xuemei Cao

    (Rice Research Institute, Sichuan Agricultural University)

  • Xingyu Zhou

    (Rice Research Institute, Sichuan Agricultural University)

  • Shumei Ye

    (Rice Research Institute, Sichuan Agricultural University)

  • Chengbo Li

    (Rice Research Institute, Sichuan Agricultural University)

  • Fengyan Gao

    (Rice Research Institute, Sichuan Agricultural University)

  • Ting Zou

    (Rice Research Institute, Sichuan Agricultural University)

  • Kailong Xie

    (Rice Research Institute, Sichuan Agricultural University)

  • Yun Ren

    (Rice Research Institute, Sichuan Agricultural University)

  • Peng Ai

    (Rice Research Institute, Sichuan Agricultural University)

  • Yangfan Tang

    (Rice Research Institute, Sichuan Agricultural University)

  • Xuemei Li

    (Rice Research Institute, Sichuan Agricultural University)

  • Qiming Deng

    (Rice Research Institute, Sichuan Agricultural University
    State Key Laboratory of Hybrid Rice, Sichuan Agricultural University
    Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education)

  • Shiquan Wang

    (Rice Research Institute, Sichuan Agricultural University
    State Key Laboratory of Hybrid Rice, Sichuan Agricultural University
    Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education)

  • Aiping Zheng

    (Rice Research Institute, Sichuan Agricultural University
    State Key Laboratory of Hybrid Rice, Sichuan Agricultural University
    Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education)

  • Jun Zhu

    (Rice Research Institute, Sichuan Agricultural University
    State Key Laboratory of Hybrid Rice, Sichuan Agricultural University
    Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education)

  • Huainian Liu

    (Rice Research Institute, Sichuan Agricultural University
    State Key Laboratory of Hybrid Rice, Sichuan Agricultural University
    Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education)

  • Lingxia Wang

    (Rice Research Institute, Sichuan Agricultural University
    State Key Laboratory of Hybrid Rice, Sichuan Agricultural University
    Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education)

  • Ping Li

    (Rice Research Institute, Sichuan Agricultural University
    State Key Laboratory of Hybrid Rice, Sichuan Agricultural University
    Key Laboratory of Crop Genetic Resources and Improvement, Sichuan Agricultural University, Ministry of Education)

Abstract

Grain number, panicle seed setting rate, panicle number and grain weight are the most important components of rice grain yield. To date, several genes related to grain weight, grain number and panicle number have been described in rice. However, no genes regulating the panicle seed setting rate have been functionally characterized. Here we show that the domestication-related POLLEN TUBE BLOCKED 1 (PTB1), a RING-type E3 ubiquitin ligase, positively regulates the rice panicle seed setting rate by promoting pollen tube growth. The natural variation in expression of PTB1 which is affected by the promoter haplotype and the environmental temperature, correlates with the rice panicle seed setting rate. Our results support the hypothesis that PTB1 is an important maternal sporophytic factor of pollen tube growth and a key modulator of the rice panicle seed setting rate. This finding has implications for the improvement of rice yield.

Suggested Citation

  • Shuangcheng Li & Wenbo Li & Bin Huang & Xuemei Cao & Xingyu Zhou & Shumei Ye & Chengbo Li & Fengyan Gao & Ting Zou & Kailong Xie & Yun Ren & Peng Ai & Yangfan Tang & Xuemei Li & Qiming Deng & Shiquan , 2013. "Natural variation in PTB1 regulates rice seed setting rate by controlling pollen tube growth," Nature Communications, Nature, vol. 4(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3793
    DOI: 10.1038/ncomms3793
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