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Photoreceptor signaling networks in plant responses to shade

Casal, Jorge J

Annual review of plant biology, 2013-01, Vol.64 (1), p.403-427 [Periódico revisado por pares]

United States: Annual Reviews, Inc

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  • Título:
    Photoreceptor signaling networks in plant responses to shade
  • Autor: Casal, Jorge J
  • Assuntos: Ecosystem ; Gibberellins - metabolism ; Light ; Photobiology ; Photoreceptors, Plant - metabolism ; Phytochrome - metabolism ; Plant biology ; Plant Growth Regulators - metabolism ; Plants - metabolism ; Proteins ; Signal Transduction ; Steroids ; Vegetation
  • É parte de: Annual review of plant biology, 2013-01, Vol.64 (1), p.403-427
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-3
    content type line 23
    ObjectType-Review-1
  • Descrição: The dynamic light environment of vegetation canopies is perceived by phytochromes, cryptochromes, phototropins, and UV RESISTANCE LOCUS 8 (UVR8). These receptors control avoidance responses to preclude exposure to limiting or excessive light and acclimation responses to cope with conditions that cannot be avoided. The low red/far-red ratios of shade light reduce phytochrome B activity, which allows PHYTOCHROME INTERACTING FACTORS (PIFs) to directly activate the transcription of auxin-synthesis genes, leading to shade-avoidance responses. Direct PIF interaction with DELLA proteins links gibberellin and brassinosteroid signaling to shade avoidance. Shade avoidance also requires CONSTITUTIVE PHOTOMORPHOGENESIS 1 (COP1), a target of cryptochromes, phytochromes, and UVR8. Multiple regulatory loops and the input of the circadian clock create a complex network able to respond even to subtle threats of competition with neighbors while still compensating for major environmental fluctuations such as the day-night cycles.
  • Editor: United States: Annual Reviews, Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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