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The NF-YC–RGL2 module integrates GA and ABA signalling to regulate seed germination in Arabidopsis

Author

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  • Xu Liu

    (Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences)

  • Pengwei Hu

    (Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences
    Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Sciences, South China Normal University)

  • Mingkun Huang

    (Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences
    University of the Chinese Academy of Sciences)

  • Yang Tang

    (Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences
    University of the Chinese Academy of Sciences)

  • Yuge Li

    (Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences)

  • Ling Li

    (Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Sciences, South China Normal University)

  • Xingliang Hou

    (Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences)

Abstract

The antagonistic crosstalk between gibberellic acid (GA) and abscisic acid (ABA) plays a pivotal role in the modulation of seed germination. However, the molecular mechanism of such phytohormone interaction remains largely elusive. Here we show that three Arabidopsis NUCLEAR FACTOR-Y C (NF-YC) homologues NF-YC3, NF-YC4 and NF-YC9 redundantly modulate GA- and ABA-mediated seed germination. These NF-YCs interact with the DELLA protein RGL2, a key repressor of GA signalling. The NF-YC–RGL2 module targets ABI5, a gene encoding a core component of ABA signalling, via specific CCAAT elements and collectively regulates a set of GA- and ABA-responsive genes, thus controlling germination. These results suggest that the NF-YC–RGL2–ABI5 module integrates GA and ABA signalling pathways during seed germination.

Suggested Citation

  • Xu Liu & Pengwei Hu & Mingkun Huang & Yang Tang & Yuge Li & Ling Li & Xingliang Hou, 2016. "The NF-YC–RGL2 module integrates GA and ABA signalling to regulate seed germination in Arabidopsis," Nature Communications, Nature, vol. 7(1), pages 1-14, November.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12768
    DOI: 10.1038/ncomms12768
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