Adjustment of the PIF7-HFR1 transcriptional module activity controls plant shade adaptation
Paulisic, Sandi (Centre de Recerca en Agrigenòmica)
Qin, Wenting (Centre de Recerca en Agrigenòmica)
Veraszto, Harshul Arora (University of Geneva. Department of Botany and Plant Biology (Switzerland))
Then, Christiane (Centre de Recerca en Agrigenòmica)
Alary, Benjamin (Centre de Recerca en Agrigenòmica)
Nogué, Fabien (Centre national de la recherche scientifique (França). Institut Jean-Pierre Bourgin)
Tsiantis, Miltos (Max Planck Institute from Plant Breeding Research. Department of Comparative Development and Genetics (Germany))
Hothorn, Michael (University of Geneva. Department of Botany and Plant Biology (Switzerland))
Martínez García, Jaime F. (Centre de Recerca en Agrigenòmica)

Date:	2021
Abstract:	Shade caused by the proximity of neighboring vegetation triggers a set of acclimation responses to either avoid or tolerate shade. Comparative analyses between the shade-avoider Arabidopsis thaliana and the shade-tolerant Cardamine hirsuta revealed a role for the atypical basic-helix-loop-helix LONG HYPOCOTYL IN FR 1 (HFR1) in maintaining the shade tolerance in C. hirsuta, inhibiting hypocotyl elongation in shade and constraining expression profile of shade-induced genes. We showed that C. hirsuta HFR1 protein is more stable than its A. thaliana counterpart, likely due to its lower binding affinity to CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1), contributing to enhance its biological activity. The enhanced HFR1 total activity is accompanied by an attenuated PHYTOCHROME INTERACTING FACTOR (PIF) activity in C. hirsuta. As a result, the PIF-HFR1 module is differently balanced, causing a reduced PIF activity and attenuating other PIF-mediated responses such as warm temperature-induced hypocotyl elongation (thermomorphogenesis) and dark-induced senescence. By this mechanism and that of the already-known of phytochrome A photoreceptor, plants might ensure to properly adapt and thrive in habitats with disparate light amounts.
Grants:	Ministerio de Economía y Competitividad SEV-2015-0533 Ministerio de Economía y Competitividad BIO2017-85316-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1211
Note:	Altres ajuts: CERCA Programme/Generalitat de Catalunya
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Cardamine hirsuta ; HFR1 ; PIFs ; Shade avoidance ; Shade tolerance
Published in:	EMBO Journal, Vol. 40, Issue 1 (January 2021) , art. e104273, ISSN 1460-2075

DOI: 10.15252/embj.2019104273
PMID: 33264441

Postprint 78 p, 1.7 MB

Appendix 17 p, 167.4 KB

Figures 5 p, 1.9 MB

Data 1 p, 330.8 KB

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