Reactive oxygen species-driven transcription in Arabidopsis under oxygen deprivation.
Plant Physiol
; 159(1): 184-96, 2012 May.
Article
en En
| MEDLINE
| ID: mdl-22415514
ABSTRACT
Reactive oxygen species (ROS) play an important role as triggers of gene expression during biotic and abiotic stresses, among which is low oxygen (O(2)). Previous studies have shown that ROS regulation under low O(2) is driven by a RHO-like GTPase that allows tight control of hydrogen peroxide (H(2)O(2)) production. H(2)O(2) is thought to regulate the expression of heat shock proteins, in a mechanism that is common to both O(2) deprivation and to heat stress. In this work, we used publicly available Arabidopsis (Arabidopsis thaliana) microarray datasets related to ROS and O(2) deprivation to define transcriptome convergence pattern. Our results show that although Arabidopsis response to anoxic and hypoxic treatments share a common core of genes related to the anaerobic metabolism, they differ in terms of ROS-related gene response. We propose that H(2)O(2) production under O(2) deprivation is a trait present in a very early phase of anoxia, and that ROS are needed for the regulation of a set of genes belonging to the heat shock protein and ROS-mediated groups. This mechanism, likely not regulated via the N-end rule pathway for O(2) sensing, is probably mediated by a NADPH oxidase and it is involved in plant tolerance to the stress.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Transcripción Genética
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Especies Reactivas de Oxígeno
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Arabidopsis
Idioma:
En
Revista:
Plant Physiol
Año:
2012
Tipo del documento:
Article
País de afiliación:
Italia