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HSP90 regulates temperature-dependent seedling growth in Arabidopsis by stabilizing the auxin co-receptor F-box protein TIR1

Author

Listed:
  • Renhou Wang

    (Section of Cell and Developmental Biology, University of San Diego California, Howard Hughes Medical Institute
    9500 Gilman Dr,)

  • Yi Zhang

    (Section of Cell and Developmental Biology, University of San Diego California, Howard Hughes Medical Institute
    9500 Gilman Dr,)

  • Martin Kieffer

    (Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds)

  • Hong Yu

    (Section of Cell and Developmental Biology, University of San Diego California, Howard Hughes Medical Institute
    9500 Gilman Dr,)

  • Stefan Kepinski

    (Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds)

  • Mark Estelle

    (Section of Cell and Developmental Biology, University of San Diego California, Howard Hughes Medical Institute
    9500 Gilman Dr,)

Abstract

Recent studies have revealed that a mild increase in environmental temperature stimulates the growth of Arabidopsis seedlings by promoting biosynthesis of the plant hormone auxin. However, little is known about the role of other factors in this process. In this report, we show that increased temperature promotes rapid accumulation of the TIR1 auxin co-receptor, an effect that is dependent on the molecular chaperone HSP90. In addition, we show that HSP90 and the co-chaperone SGT1 each interact with TIR1, confirming that TIR1 is an HSP90 client. Inhibition of HSP90 activity results in degradation of TIR1 and interestingly, defects in a range of auxin-mediated growth processes at lower as well as higher temperatures. Our results indicate that HSP90 and SGT1 integrate temperature and auxin signalling in order to regulate plant growth in a changing environment.

Suggested Citation

  • Renhou Wang & Yi Zhang & Martin Kieffer & Hong Yu & Stefan Kepinski & Mark Estelle, 2016. "HSP90 regulates temperature-dependent seedling growth in Arabidopsis by stabilizing the auxin co-receptor F-box protein TIR1," Nature Communications, Nature, vol. 7(1), pages 1-11, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10269
    DOI: 10.1038/ncomms10269
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    Cited by:

    1. Yogev Burko & Björn Christopher Willige & Adam Seluzicki & Ondřej Novák & Karin Ljung & Joanne Chory, 2022. "PIF7 is a master regulator of thermomorphogenesis in shade," Nature Communications, Nature, vol. 13(1), pages 1-14, December.

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