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Brassinosteroid signaling-dependent root responses to prolonged elevated ambient temperature

Author

Listed:
  • Sara Martins

    (Université Paris-Saclay)

  • Alvaro Montiel-Jorda

    (Université Paris-Saclay)

  • Anne Cayrel

    (Université Paris-Saclay)

  • Stéphanie Huguet

    (Université Paris-Sud, Université Evry, Université Paris-Saclay
    Sorbonne Paris-Cité)

  • Christine Paysant-Le Roux

    (Université Paris-Sud, Université Evry, Université Paris-Saclay
    Sorbonne Paris-Cité)

  • Karin Ljung

    (Swedish University of Agricultural Sciences)

  • Grégory Vert

    (Université Paris-Saclay)

Abstract

Due to their sessile nature, plants have to cope with and adjust to their fluctuating environment. Temperature elevation stimulates the growth of Arabidopsis aerial parts. This process is mediated by increased biosynthesis of the growth-promoting hormone auxin. How plant roots respond to elevated ambient temperature is however still elusive. Here we present strong evidence that temperature elevation impinges on brassinosteroid hormone signaling to alter root growth. We show that elevated temperature leads to increased root elongation, independently of auxin or factors known to drive temperature-mediated shoot growth. We further demonstrate that brassinosteroid signaling regulates root responses to elevated ambient temperature. Increased growth temperature specifically impacts on the level of the brassinosteroid receptor BRI1 to downregulate brassinosteroid signaling and mediate root elongation. Our results establish that BRI1 integrates temperature and brassinosteroid signaling to regulate root growth upon long-term changes in environmental conditions associated with global warming.

Suggested Citation

  • Sara Martins & Alvaro Montiel-Jorda & Anne Cayrel & Stéphanie Huguet & Christine Paysant-Le Roux & Karin Ljung & Grégory Vert, 2017. "Brassinosteroid signaling-dependent root responses to prolonged elevated ambient temperature," Nature Communications, Nature, vol. 8(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00355-4
    DOI: 10.1038/s41467-017-00355-4
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    Cited by:

    1. Sanghwa Lee & Julia Showalter & Ling Zhang & Gaëlle Cassin-Ross & Hatem Rouached & Wolfgang Busch, 2024. "Nutrient levels control root growth responses to high ambient temperature in plants," Nature Communications, Nature, vol. 15(1), pages 1-15, December.

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