Photoreceptor Activity Contributes to Contrasting Responses to Shade in Cardamine and Arabidopsis Seedlings
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https://doi.org/10.1105/tpc.19.00275 |
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Título
Photoreceptor Activity Contributes to Contrasting Responses to Shade in Cardamine and Arabidopsis SeedlingsAutoría
Fecha de publicación
2019Editor
American Society of Plant BiologistsISSN
1040-4651; 1532-298XCita bibliográfica
MOLINA-CONTRERAS, Maria Jose, et al. Photoreceptor activity contributes to contrasting responses to shade in Cardamine and Arabidopsis seedlings. The Plant Cell, 2019, vol. 31, no 11, p. 2649-2663.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.plantcell.org/content/31/11/2649Versión
info:eu-repo/semantics/publishedVersionResumen
Plants have evolved two major ways to deal with nearby vegetation or shade: avoidance and tolerance. Moreover, some plants respond to shade in different ways; for example, Arabidopsis (Arabidopsis thaliana) undergoes ... [+]
Plants have evolved two major ways to deal with nearby vegetation or shade: avoidance and tolerance. Moreover, some plants respond to shade in different ways; for example, Arabidopsis (Arabidopsis thaliana) undergoes an avoidance response to shade produced by vegetation, but its close relative Cardamine hirsuta tolerates shade. How plants adopt opposite strategies to respond to the same environmental challenge is unknown. Here, using a genetic strategy, we identified the C. hirsuta slender in shade1 mutants, which produce strongly elongated hypocotyls in response to shade. These mutants lack the phytochrome A (phyA) photoreceptor. Our findings suggest that C. hirsuta has evolved a highly efficient phyA-dependent pathway that suppresses hypocotyl elongation when challenged by shade from nearby vegetation. This suppression relies, at least in part, on stronger phyA activity in C. hirsuta; this is achieved by increased ChPHYA expression and protein accumulation combined with a stronger specific intrinsic repressor activity. We suggest that modulation of photoreceptor activity is a powerful mechanism in nature to achieve physiological variation (shade tolerance versus avoidance) for species to colonize different habitats. [-]
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The Plant Cell, Vol. 31, November 2019Proyecto de investigación
LCF/BQ/IN18/11660004, European Commission (H2020-MSCA-IF-2017)797473, CRAGshort-term fellowship (FP7-PEOPLE-IEF-2008) 237492, Biotechnology and Biological Sciences Research Council (BBSRC) BB/H006974/1, MINECO-FEDER BIO2017-85316-R BIO2017-84041-P, AGAUR 2017-SGR1211 2017-SGR710, MINECO SEV-2015-0533Derechos de acceso
© 2019 American Society of Plant Biologists. All rights reserved.
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