GENOMES UNCOUPLED1-independent retrograde signaling targets the ethylene pathway to repress photomorphogenesis
Gommers, Charlotte M. M. (Centre de Recerca en Agrigenòmica)
Ruiz-Sola, M. Águila (Centre de Recerca en Agrigenòmica)
Ayats, Alba (Centre de Recerca en Agrigenòmica)
Pereira, Lara (Centre de Recerca en Agrigenòmica)
Pujol Abajo, Marta (Centre de Recerca en Agrigenòmica)
Monte Collado, Elena (Centre de Recerca en Agrigenòmica)

Date:	2021
Abstract:	When germinating in the light, Arabidopsis (Arabidopsis thaliana) seedlings undergo photomorphogenic development, characterized by short hypocotyls, greening, and expanded cotyledons. Stressed chloroplasts emit retrograde signals to the nucleus that induce developmental responses and repress photomorphogenesis. The nuclear targets of these retrograde signals are not yet fully known. Here, we show that lincomycin-treated seedlings (which lack developed chloroplasts) show strong phenotypic similarities to seedlings treated with ethylene (ET) precursor 1-aminocyclopropane-1-carboxylic acid, as both signals inhibit cotyledon separation in the light. We show that the lincomycin-induced phenotype partly requires a functioning ET signaling pathway, but could not detect increased ET emissions in response to the lincomycin treatment. The two treatments show overlap in upregulated gene transcripts, downstream of transcription factors ETHYLENE INSENSITIVE3 and EIN3-LIKE1. The induction of the ET signaling pathway is triggered by an unknown retrograde signal acting independently of GENOMES UNCOUPLED1. Our data show how two apparently different stress responses converge to optimize photomorphogenesis.
Grants:	Ministerio de Ciencia e Innovación BIO2015-68460-P Ministerio de Ciencia e Innovación PGC2018-099987-B-I00 Ministerio de Economía y Competitividad FJCI-2016-30876 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-718 Ministerio de Economía y Competitividad SEV-2015-0533
Note:	Altres ajuts: CERCA Programme/Generalitat de Catalunya
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Plant Physiology, Vol. 185, Issue 1 (January 2021) , p. 67-76, ISSN 0032-0889

DOI: 10.1093/plphys/kiaa015
PMID: 33631804

10 p, 860.7 KB

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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