Decreased levels of Thioredoxin o1 influences stomatal development and aperture but not Photosynthesis under non-stress and saline conditions
Author
Sánchez-Guerrero, Antonio
Nadal, Miquel
Ribas-Carbó, Miquel
Vallarino, José G.
De Brasi-Velasco, Sabrina
Fernie, Alisdair R.
Flexas, Jaume
Jiménez, Ana
Sevilla, Francisca
Publication date
2021-01-21ISSN
1661-6596
Abstract
Salinity has a negative impact on plant growth, with photosynthesis being downregulated partially due to osmotic effect and enhanced cellular oxidation. Redox signaling contributes to the plant response playing thioredoxins (TRXs) a central role. In this work we explore the potential contribution of Arabidopsis TRXo1 to the photosynthetic response under salinity analyzing Arabidopsis wild-type (WT) and two Attrxo1 mutant lines in their growth under short photoperiod and higher light intensity than previous reported works. Stomatal development and apertures and the antioxidant, hormonal and metabolic acclimation are also analyzed. In control conditions mutant plants displayed less and larger developed stomata and higher pore size which could underlie their higher stomatal conductance, without being affected in other photosynthetic parameters. Under salinity, all genotypes displayed a general decrease in photosynthesis and the oxidative status in the Attrxo1 mutant lines was altered, with higher levels of H2O2 and NO but also higher ascorbate/glutathione (ASC/GSH) redox states than WT plants. Finally, sugar changes and increases in abscisic acid (ABA) and NO may be involved in the observed higher stomatal response of the TRXo1-altered plants.
Therefore, the lack of AtTRXo1 affected stomata development and opening and the mutants modulate
their antioxidant, metabolic and hormonal responses to optimize their adaptation to salinity.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
633 - Field crops and their production
Pages
22
Publisher
MDPI
Is part of
International Journal of Molecular Sciences
Citation
Sánchez-Guerrero, Antonio, Miquel Nadal, Igor Florez-Sarasa, Miquel Ribas-Carbó, José G. Vallarino, Sabrina De Brasi-Velasco, Alisdair R. Fernie, Jaume Flexas, Ana Jiménez, and Francisca Sevilla. 2021. "Decreased Levels Of Thioredoxin O1 Influences Stomatal Development And Aperture But Not Photosynthesis Under Non-Stress And Saline Conditions". International Journal Of Molecular Sciences 22 (3): 1063. doi:10.3390/ijms22031063.
Grant agreement number
MINECO-FEDER/Programa Estatal de fomento de la investigación científica y técnica de excelencia/CTM2014-53902-C2-1-P/ES/BASES MECANICISTAS PARA EL TRADE-OFF ENTRE LA FOTOSINTESIS Y LA TOLERANCIA AL ESTRES: LLENAR LAS LAGUNAS DE LA BIOLOGIA EVOLUTIVA Y LA BIOTECNOLOGIA DE PLANTAS/
MINECO-FEDER/Programa Estatal de fomento de la investigación científica y técnica de excelencia/BFU2017-86585-P/ES/Regulación REDOX por tiorredoxina (TRX01) en plantas: implicación en ciclo celular, señalización hormonal y estrés salino/
MINECO-FEDER/Programa Estatal de generación del conocimiento y fortalecimiento científico y tecnológico del sistema I+D+I/PGC2018-093824-B-C41/ES/RAICES ECOFISIOLOGICAS Y EVOLUTIVAS DE LA TOLERANCIA A ESTRESES MULTIPLES EN PLANTAS/
EC/H2020/753301/EU/Exploring the role of the mitochondrial alternative respiration in carotenoid biosynthesis during tomato fruit ripening/ARCATOM
Program
Genòmica i Biotecnologia
This item appears in the following Collection(s)
- ARTICLES CIENTÍFICS [2831]
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/