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Arabidopsis seed germination speed is controlled by SNL histone deacetylase-binding factor-mediated regulation of AUX1

Author

Listed:
  • Zhi Wang

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences)

  • Fengying Chen

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences)

  • Xiaoying Li

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
    College of Life Sciences, University of Chinese Academy of Sciences)

  • Hong Cao

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences)

  • Meng Ding

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
    College of Life Sciences, University of Chinese Academy of Sciences)

  • Cun Zhang

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
    College of Life Sciences, University of Chinese Academy of Sciences)

  • Jinghong Zuo

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
    College of Life Sciences, University of Chinese Academy of Sciences)

  • Chaonan Xu

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
    College of Life Sciences, University of Chinese Academy of Sciences)

  • Jimei Xu

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
    College of Life Sciences, University of Chinese Academy of Sciences)

  • Xin Deng

    (Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences)

  • Yong Xiang

    (Max Planck Institute for Plant Breeding Research)

  • Wim J. J. Soppe

    (Max Planck Institute for Plant Breeding Research
    Institute of Molecular Physiology and Biotechnology of Plants (IMBIO), University of Bonn)

  • Yongxiu Liu

    (Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences)

Abstract

Histone acetylation is known to affect the speed of seed germination, but the molecular regulatory basis of this remains ambiguous. Here we report that loss of function of two histone deacetylase-binding factors, SWI-INDEPENDENT3 (SIN3)-LIKE1 (SNL1) and SNL2, results in accelerated radicle protrusion and growth during seed germination. AUXIN RESISTANT 1 (AUX1) is identified as a key factor in this process, enhancing germination speed downstream of SNL1 and SNL2. AUX1 expression and histone H3 acetylation at lysines 9 and 18 is regulated by SNL1 and SNL2. The D-type cyclins encoding genes CYCD1;1 and CYCD4;1 display increased expression in AUX1 over-expression lines and the snl1snl2 double mutant. Accordingly, knockout of CYCD4;1 reduces seed germination speed of AUX1 over-expression lines and snl1snl2 suggesting the importance of cell cycling for radicle protrusion during seed germination. Together, our work identifies AUX1 as a link between histone acetylation mediated by SNL1 and SNL2, and radicle growth promoted by CYCD1;1 and CYCD4;1 during seed germination.

Suggested Citation

  • Zhi Wang & Fengying Chen & Xiaoying Li & Hong Cao & Meng Ding & Cun Zhang & Jinghong Zuo & Chaonan Xu & Jimei Xu & Xin Deng & Yong Xiang & Wim J. J. Soppe & Yongxiu Liu, 2016. "Arabidopsis seed germination speed is controlled by SNL histone deacetylase-binding factor-mediated regulation of AUX1," Nature Communications, Nature, vol. 7(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13412
    DOI: 10.1038/ncomms13412
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