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Functional interaction of phytochrome B and cryptochrome 2

Author

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  • Paloma Más

    (The Scripps Research Institute)

  • Paul F. Devlin

    (The Scripps Research Institute)

  • Satchidananda Panda

    (The Scripps Research Institute)

  • Steve A. Kay

    (The Scripps Research Institute)

Abstract

Light is a crucial environmental signal that controls many photomorphogenic and circadian responses in plants1. Perception and transduction of light is achieved by at least two principal groups of photoreceptors, phytochromes and cryptochromes2,3. Phytochromes are red/far-red light-absorbing receptors encoded by a gene family of five members (phyA to phyE)2,4 in Arabidopsis. Cryptochrome 1 (cry1), cryptochrome 2 (cry2) and phototropin are the blue/ultraviolet-A light receptors that have been characterized in Arabidopsis5. Previous studies showed that modulation of many physiological responses in plants is achieved by genetic interactions between different photoreceptors6; however, little is known about the nature of these interactions and their roles in the signal transduction pathway. Here we show the genetic interaction that occurs between the Arabidopsis photoreceptors phyB and cry2 in the control of flowering time, hypocotyl elongation and circadian period by the clock. PhyB interacts directly with cry2 as observed in co-immunoprecipitation experiments with transgenic Arabidopsis plants overexpressing cry2. Using fluorescent resonance energy transfer microscopy, we show that phyB and cry2 interact in nuclear speckles that are formed in a light-dependent fashion.

Suggested Citation

  • Paloma Más & Paul F. Devlin & Satchidananda Panda & Steve A. Kay, 2000. "Functional interaction of phytochrome B and cryptochrome 2," Nature, Nature, vol. 408(6809), pages 207-211, November.
    • Handle: RePEc:nat:nature:v:408:y:2000:i:6809:d:10.1038_35041583
    DOI: 10.1038/35041583
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    Cited by:

    1. Dennis Vettkötter & Martin Schneider & Brady D. Goulden & Holger Dill & Jana Liewald & Sandra Zeiler & Julia Guldan & Yilmaz Arda Ateş & Shigeki Watanabe & Alexander Gottschalk, 2022. "Rapid and reversible optogenetic silencing of synaptic transmission by clustering of synaptic vesicles," Nature Communications, Nature, vol. 13(1), pages 1-17, December.
    2. Weiliang Mo & Junchuan Zhang & Li Zhang & Zhenming Yang & Liang Yang & Nan Yao & Yong Xiao & Tianhong Li & Yaxing Li & Guangmei Zhang & Mingdi Bian & Xinglin Du & Zecheng Zuo, 2022. "Arabidopsis cryptochrome 2 forms photobodies with TCP22 under blue light and regulates the circadian clock," Nature Communications, Nature, vol. 13(1), pages 1-15, December.
    3. Ruth Jean Ae Kim & De Fan & Jiangman He & Keunhwa Kim & Juan Du & Meng Chen, 2024. "Photobody formation spatially segregates two opposing phytochrome B signaling actions of PIF5 degradation and stabilization," Nature Communications, Nature, vol. 15(1), pages 1-14, December.

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