Chloroplasts modulate elongation responses to canopy shade by retrograde pathways involving HY5 and abscisic acid
Ortiz-Alcaide, Miriam (Centre de Recerca en Agrigenòmica)
Llamas, Ernesto (Centre de Recerca en Agrigenòmica)
Gómez-Cadenas, Aurelio (Universitat Jaume I)
Nagatani, Akira (Kyoto University)
Martínez García, Jaime F. (Centre de Recerca en Agrigenòmica)
Rodríguez Concepción, Manuel (Centre de Recerca en Agrigenòmica)

Date:	2019
Abstract:	Plants use light as energy for photosynthesis but also as a signal of competing vegetation. Using different concentrations of norflurazon and lincomycin, we found that the response to canopy shade in Arabidopsis (Arabidopsis thaliana) was repressed even when inhibitors only caused a modest reduction in the level of photosynthetic pigments. High inhibitor concentrations resulted in albino seedlings that were unable to elongate when exposed to shade, in part due to attenuated light perception and signaling via phytochrome B and phytochrome-interacting factors. The response to shade was further repressed by a retrograde network with two separate nodes represented by the transcription factor LONG HYPOCOTYL 5 and the carotenoid-derived hormone abscisic acid. The unveiled connection among chloroplast status, light (shade) signaling, and developmental responses should contribute to achieve optimal photosynthetic performance under light-changing conditions.
Grants:	Ministerio de Ciencia e Innovación BIO2017-84041-P Ministerio de Ciencia e Innovación BIO2017-85316-R Ministerio de Ciencia e Innovación BIO2017-90877-REDT Ministerio de Ciencia e Innovación BIO2015-71703-REDT Ministerio de Ciencia e Innovación BIO2014-59092-P Ministerio de Ciencia e Innovación BIO2014-59895-P Ministerio de Economía y Competitividad SEV-2015-0533 Ministerio de Economía y Competitividad BES-2012-052597 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-1211 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-710
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Published in:	The Plant Cell, Vol. 31, issue 2 (Feb. 2019) , p. 384-398, ISSN 1040-4651

DOI: 10.1105/tpc.18.00617
PMID: 30705135

Postprint 33 p, 1.8 MB

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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