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Photoreceptor Activity Contributes to Contrasting Responses to Shade in Cardamine and Arabidopsis Seedlings
Molina-Contreras, Maria José (Centre de Recerca en Agrigenòmica)
Paulišić, Sandi (Centre de Recerca en Agrigenòmica)
Then, Christiane (Centre de Recerca en Agrigenòmica)
Moreno Romero, Jordi (Centre de Recerca en Agrigenòmica)
Pastor Andreu, Pedro (Centre de Recerca en Agrigenòmica)
Morelli, Luca (Centre de Recerca en Agrigenòmica)
Roig-Villanova, Irma (Centre de Recerca en Agrigenòmica)
Jenkins, Huw (University of Oxford)
Hallab, Asis (Max Planck Institute)
Gan, Xiangchao (Max Planck Institute)
Gómez-Cadenas, Aurelio (Universitat Jaume I)
Tsiantis, Miltos (Max Planck Institute)
Rodríguez Concepción, Manuel (Centre de Recerca en Agrigenòmica)
Martínez-García, Jaime F. (Centre de Recerca en Agrigenòmica)

Date: 2019
Abstract: 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 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 (sis1) 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 vs. avoidance) for species to colonize different habitats.
Note: Número d'acord de subvenció EC/H2020/797473
Note: Número d'acord de subvenció EC/FP7/237492
Note: Número d'acord de subvenció MINECO/BIO2017-85316-R
Note: Número d'acord de subvenció MINECO/BIO2017-84041-P
Note: Número d'acord de subvenció AGAUR/2017/SGR-1211
Note: Número d'acord de subvenció AGAUR/2017/SGR-710
Note: Número d'acord de subvenció MINECO/SEV‐2015‐0533
Rights: Tots els drets reservats
Language: Anglès.
Document: article ; recerca ; acceptedVersion
Published in: The Plant Cell, Vol. 31 (Nov. 2019) , p. 2649–2663, ISSN 1040-4651

DOI: 10.1105/tpc.19.00275


Available from: 2020-12-30
Postprint

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CRAG (Centre for Research in Agricultural Genomics)
Articles > Research articles
Articles > Published articles

 Record created 2019-10-21, last modified 2019-11-25



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