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PCH1 and PCHL promote photomorphogenesis in plants by controlling phytochrome B dark reversion

Author

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  • Beatrix Enderle

    (Institute of Biology II, University of Freiburg)

  • David J. Sheerin

    (Institute of Biology II, University of Freiburg)

  • Inyup Paik

    (The University of Texas at Austin)

  • Praveen Kumar Kathare

    (The University of Texas at Austin)

  • Philipp Schwenk

    (Institute of Biology II, University of Freiburg
    University of Freiburg)

  • Cornelia Klose

    (Institute of Biology II, University of Freiburg)

  • Maximilian H. Ulbrich

    (University of Freiburg
    Freiburg University Medical Center
    University of Freiburg)

  • Enamul Huq

    (The University of Texas at Austin)

  • Andreas Hiltbrunner

    (Institute of Biology II, University of Freiburg
    University of Freiburg
    University of Freiburg)

Abstract

Phytochrome B (phyB) is the primary red light photoreceptor in plants, and regulates both growth and development. The relative levels of phyB in the active state are determined by the light conditions, such as direct sunlight or shade, but are also affected by light-independent dark reversion. Dark reversion is a temperature-dependent thermal relaxation process, by which phyB reverts from the active to the inactive state. Here, we show that the homologous phyB-binding proteins PCH1 and PCHL suppress phyB dark reversion, resulting in plants with dramatically enhanced light sensitivity. Moreover, far-red and blue light upregulate the expression of PCH1 and PCHL in a phyB independent manner, thereby increasing the response to red light perceived by phyB. PCH1 and PCHL therefore provide a node for the molecular integration of different light qualities by regulation of phyB dark reversion, allowing plants to adapt growth and development to the ambient environment.

Suggested Citation

  • Beatrix Enderle & David J. Sheerin & Inyup Paik & Praveen Kumar Kathare & Philipp Schwenk & Cornelia Klose & Maximilian H. Ulbrich & Enamul Huq & Andreas Hiltbrunner, 2017. "PCH1 and PCHL promote photomorphogenesis in plants by controlling phytochrome B dark reversion," Nature Communications, Nature, vol. 8(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-02311-8
    DOI: 10.1038/s41467-017-02311-8
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    Cited by:

    1. Zenglin Li & David J. Sheerin & Edda Roepenack-Lahaye & Mark Stahl & Andreas Hiltbrunner, 2022. "The phytochrome interacting proteins ERF55 and ERF58 repress light-induced seed germination in Arabidopsis thaliana," Nature Communications, Nature, vol. 13(1), pages 1-18, December.
    2. Chanhee Kim & Yongmin Kwon & Jaehoon Jeong & Minji Kang & Ga Seul Lee & Jeong Hee Moon & Hyo-Jun Lee & Youn-Il Park & Giltsu Choi, 2023. "Phytochrome B photobodies are comprised of phytochrome B and its primary and secondary interacting proteins," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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