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Pàgina inicial > Articles > Articles publicats > Adjustment of the PIF7-HFR1 transcriptional module activity controls plant shade adaptation |
Data: | 2021 |
Resum: | 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. |
Ajuts: | 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 |
Nota: | Altres ajuts: CERCA Programme/Generalitat de Catalunya |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Cardamine hirsuta ; HFR1 ; PIFs ; Shade avoidance ; Shade tolerance |
Publicat a: | EMBO Journal, Vol. 40, Issue 1 (January 2021) , art. e104273, ISSN 1460-2075 |
Postprint 78 p, 1.7 MB |
Appendix 17 p, 167.4 KB |
Figures 5 p, 1.9 MB |
Data 1 p, 330.8 KB |