PIF transcriptional regulators are required for rhythmic stomatal movements
Rovira, Arnau (Centre de Recerca en Agrigenòmica)
Veciana Fonts, Nil (Centre de Recerca en Agrigenòmica)
Basté-Miquel, Aina (Centre de Recerca en Agrigenòmica)
Quevedo, Martí (Centre de Recerca en Agrigenòmica)
Locascio, Antonella (Universidad CEU Cardenal Herrera. Department of biomedical science)
Yenush, Lynne (Universitat Politècnica de València)
Toledo-Ortiz, Gabriela (James Hutton Institute)
Leivar, Pablo (Universitat Ramon Llull)
Monte Collado, Elena (Centre de Recerca en Agrigenòmica)

Date:	2024
Abstract:	Stomata govern the gaseous exchange between the leaf and the external atmosphere, and their function is essential for photosynthesis and the global carbon and oxygen cycles. Rhythmic stomata movements in daily dark/light cycles prevent water loss at night and allow CO uptake during the day. How the actors involved are transcriptionally regulated and how this might contribute to rhythmicity is largely unknown. Here, we show that morning stomata opening depends on the previous night period. The transcription factors PHYTOCHROME-INTERACTING FACTORS (PIFs) accumulate at the end of the night and directly induce the guard cell-specific K + channel KAT1. Remarkably, PIFs and KAT1 are required for blue light-induced stomata opening. Together, our data establish a molecular framework for daily rhythmic stomatal movements under well-watered conditions, whereby PIFs are required for accumulation of KAT1 at night, which upon activation by blue light in the morning leads to the K + intake driving stomata opening. Stomata function is essential for photosynthesis and the global carbon and oxygen cycles. Here, the authors report the regulatory framework that establishes rhythmic pore movements to prevent water loss at night and allow CO uptake during the day.
Grants:	Agencia Estatal de Investigación PGC2018-099987-B-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-718 Ministerio de Economía y Competitividad BIO2015-68460-P Agencia Estatal de Investigación PID2021-122288NB-I00 Agencia Estatal de Investigación PID2019-10454GB-I00 Ministerio de Economía y Competitividad SEV-2015-0533 Agencia Estatal de Investigación CEX2019-000902-S Agència de Gestió d'Ajuts Universitaris i de Recerca 2023/FI-1-00910 European Commission 945043
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Plant signalling ; Stomata ; Light responses
Published in:	Nature communications, Vol. 15 (May 2024) , art. 4540, ISSN 2041-1723

DOI: 10.1038/s41467-024-48669-4
PMID: 38811542

12 p, 1.6 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