OsICE1 transcription factor improves photosynthetic performance and reduces grain losses in rice plants subjected to drought

Autor: Nelson J. M. Saibo, M. Margarida Oliveira, Tânia S. Serra, Douglas Jardim-Messeder, Diego M. Almeida, Subhash Chander, Márcia Margis-Pinheiro, Pedro M. Barros, Tiago Lourenço, Duarte D. Figueiredo, J. M. Costa
Přispěvatelé: Universidade Nova de Lisboa = NOVA University Lisbon (NOVA), Chaudhary Charan Singh Haryana Agricultural University, Biochimie et Physiologie Moléculaire des Plantes (BPMP), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Instituto de Biologia Experimental e Tecnológica (IBET), Universidade Federal do Rio Grande do Sul (UFRGS), Department Plant Biology, Michigan State University [East Lansing], Michigan State University System-Michigan State University System, Linnean Centre for Plant Biology in Uppsala, Partenaires INRAE, Universidade de Lisboa (ULISBOA), EC Marie Curie (ADONIS) Portuguese Foundation for Science and Technology PTDC/BIA-BCM/099836/2008 Portuguese Foundation for Science and Technology SFRH/BD/65229/2009 SFRH/BD/31011/2006 SFRH/BPD/34429/2006 SFRH/BPD/93334/2013 SFRH/BPD/34943/2007 SFRH/BPD/102872/2014 SFRH/BD/31594/2006 SFRH/BD/29258/2006 CAPES National Council for Scientific and Technological Development (CNPq) FCT Investigator - POPH (QREN) IF/01126/2012 Portuguese Foundation for Science and Technology POCI/BIA-BCM/56063/2004 PTDC/BIA_BCM/099836/2008 Research unit GREEN-it 'Bioresources for Sustainability' UID/Multi/04551/2013
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Environmental and Experimental Botany
Environmental and Experimental Botany, Elsevier, 2018, 150, pp.88-98. ⟨10.1016/j.envexpbot.2018.02.004⟩
ISSN: 0098-8472
DOI: 10.1016/j.envexpbot.2018.02.004⟩
Popis: International audience; Drought is a major environmental threat to agriculture sustainability. We have characterised the role of OsICE1, a basic helix-loop-helix (bHLH) transcription factor from rice (Otyza saliva L.), in response to drought. OsICEI gene is constitutively expressed in roots and shoots of rice seedlings grown under control conditions, as well as in response to low temperature, high salinity, and ABA. Nevertheless, in response to drought, OsICE1 is up-regulated in roots. Plants over-expressing OsICE1 (OsICEI-OX) show improved drought tolerance at both vegetative and reproductive stages, whereas OsICE1 silenced plants (OsICE1-RNA1) show decreased drought tolerance in the same phenological stages. Under drought, OsICE1-0X plants show improved net photosynthetic rates and stomatal conductance to water vapour, as well as higher photochemical efficiency of photosystem II and tolerance to photo-inhibition, as compared to the WT and OsICEI-RNAi. In addition, under severe drought, OsICEI-OX plants show lower grain yield losses than WT, while OsICE1-12NAi plants show the highest grain losses. OsICE1-OX and OSICE1-RNAi plants do not differentially respond to ABA, and drought-inducible genes are more responsive in OsICEI-RNAi and less in OsICE1-OX plants (as compared to WT), suggesting that OsICE1 has a central role modulating molecular responses to drought in an ABA-independent way. This role might be mediated by OsWsi18, a LEA encoding gene up regulated in OsICE1-OX rice plants and known to enhance membrane stability under drought.
Databáze: OpenAIRE
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