(h)GR, beans and drought stress

Reactive oxygen species (ROS) are commonly found in plants as natural by-products of the metabolism but their production is greatly enhanced under abiotic stresses. Particular metabolites and enzymes belonging to the ascorbate-glutathione cycle are able to scavenge these deleterious molecules and mo...

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Bibliographic Details
Published in:Plant signaling & behavior 2008-10, Vol.3 (10), p.834-835
Main Authors: Cruz de Carvalho, Maria Helena, Contour-Ansel, Dominique
Format: Article
Language:English
Subjects:
Addendum
Binding
Biology
Bioscience
Calcium
Cancer
Cell
Cycle
Landes
Life Sciences
Organogenesis
Proteins
Vegetal Biology
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Summary:Reactive oxygen species (ROS) are commonly found in plants as natural by-products of the metabolism but their production is greatly enhanced under abiotic stresses. Particular metabolites and enzymes belonging to the ascorbate-glutathione cycle are able to scavenge these deleterious molecules and modulate the cellular redox-status. In the March issue of Journal of Plant Physiology, we have shown that drought stress induces a raise in glutathione reductase (GR) activity and gene expression that could be related to the intensity of the drought treatment and the drought susceptibility of the bean cultivar (cowpea and/or common bean). In the present addendum we show new data on GR specific activity during progressive drought stress and recovery of the drought-susceptible bean cultivar which can be related to the previously found dual-targeted GR gene expression. Furthermore, since in leguminous plants homoglutathione (hGSH) is generally the most abundant low molecular weight thiol form, we discuss on the occurrence of a (homo)glutathione reductase activity in beans. Addendum to: Torres-Franklin ML, Contour-Ansel D, Zuily-Fodil Y, Pham-Thi AT. Molecular cloning of glutathione reductase cDNAs and analysis of GR gene expression in cowpea and common bean leaves during recovery from moderate drought stress. J Plant Physiol 2008; 165:514-21.
ISSN:1559-2316
1559-2324
1559-2324
DOI:10.4161/psb.3.10.5918