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Artículo

Phytochrome B and PCH1 protein dynamics store night temperature information

Murcia, Mauro GermánIcon ; Enderle, Beatrix; Hiltbrunner, Andreas; Casal, Jorge JoséIcon
Fecha de publicación: 01/2021
Editorial: Wiley Blackwell Publishing, Inc
Revista: Plant Journal
ISSN: 0960-7412
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Bioquímica y Biología Molecular

Resumen

Plants experience temperature fluctuations during the course of the daily cycle, and although stem growth responds rapidly to these changes we largely ignore whether there is a short-term memory of previous conditions. Here we show that nighttime temperatures affect the growth of the hypocotyl of Arabidopsis thaliana seedlings not only during the night but also during the subsequent photoperiod. Active phytochrome B (phyB) represses nighttime growth and warm temperatures reduce active phyB via thermal reversion. The function of PHOTOPERIODIC CONTROL OF HYPOCOTYL1 (PCH1) is to stabilise active phyB in nuclear bodies but, surprisingly, warmth reduces PCH1 gene expression and PCH1 stability. When phyB was active at the beginning of the night, warm night temperatures enhanced the levels of nuclear phyB and reduced hypocotyl growth rate during the following day. However, when end-of-day far-red light minimised phyB activity, warm night temperatures reduced the levels of nuclear phyB and enhanced the hypocotyl growth rate during the following day. This complex growth pattern was absent in the phyB mutant. We propose that temperature-induced changes in the levels of PCH1 and in the size of the physiologically relevant nuclear pool of phyB amplify the impact of phyB-mediated temperature sensing.
Palabras clave: ARABIDOPSIS THALIANA , PHOTOPERIODIC CONTROL OF HYPOCOTYL1 , PHYTOCHROME B , SHADE , THERMOMORPHOGENESIS
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/168052
URL: https://onlinelibrary.wiley.com/doi/10.1111/tpj.15034
DOI: http://dx.doi.org/10.1111/tpj.15034
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Articulos(IFEVA)
Articulos de INST.D/INV.FISIOLOGICAS Y ECO.VINCULADAS A L/AGRIC
Citación
Murcia, Mauro Germán; Enderle, Beatrix; Hiltbrunner, Andreas; Casal, Jorge José; Phytochrome B and PCH1 protein dynamics store night temperature information; Wiley Blackwell Publishing, Inc; Plant Journal; 105; 1; 1-2021; 22-33
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