Artículo
The mitochondrial oxidation resistance protein AtOXR2 increases plant biomass and tolerance to oxidative stress
Mencia, Regina
; Colombatti, Francisco
; García, Lucila
; Mansilla, Natanael
; Alemano, Sergio Gabriel; Andrade, Andrea Mariela
; Gonzalez, Daniel Hector
; Welchen, Elina
Fecha de publicación:
06/2019
Editorial:
Oxford University Press
Revista:
Journal of Experimental Botany
ISSN:
0022-0957
e-ISSN:
1460-2431
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
This study demonstrates the existence of the oxidation resistance (OXR) protein family in plants. There are six OXR members in Arabidopsis that contain the highly conserved TLDc domain that is characteristic of this eukaryotic protein family. AtOXR2 is a mitochondrial protein able to alleviate the stress sensitivity of a yeast oxr1 mutant. It was induced by oxidative stress and its overexpression in Arabidopsis (oeOXR2) increased leaf ascorbate, photosynthesis, biomass, and seed production, as well as conferring tolerance to methyl viologen, antimycin A, and high light intensities. The oeOXR2 plants also showed higher ABA content, changes in ABA sensitivity, and modified expression of ABA- and stress-regulated genes. While the oxr2 mutants had a similar shoot phenotype to the wild-type, they exhibited increased sensitivity to stress. We propose that by influencing the levels of reactive oxygen species (ROS), AtOXR2 improves the efficiency of photosynthesis and elicits basal tolerance to environmental challenges that increase oxidative stress, allowing improved plant growth and biomass production.
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Articulos(IAL)
Articulos de INSTITUTO DE AGROBIOTECNOLOGIA DEL LITORAL
Articulos de INSTITUTO DE AGROBIOTECNOLOGIA DEL LITORAL
Articulos(IBR)
Articulos de INST.DE BIOLOGIA MOLECULAR Y CELULAR DE ROSARIO
Articulos de INST.DE BIOLOGIA MOLECULAR Y CELULAR DE ROSARIO
Citación
Mencia, Regina; Colombatti, Francisco; García, Lucila; Mansilla, Natanael; Alemano, Sergio Gabriel; et al.; The mitochondrial oxidation resistance protein AtOXR2 increases plant biomass and tolerance to oxidative stress; Oxford University Press; Journal of Experimental Botany; 70; 12; 6-2019; 3177-3195
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