title: (h)GR, beans and drought stress.
abstract: 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.
authors.affiliation: Laboratoire d'Ecophysiologie Moléculaire; UMR IRD 137 BioSol; Université Paris Est-Paris 12; Créteil France.
authors.forename: Maria Helena
authors.initials: MH
authors.lastname: Cruz de Carvalho
authors.forename: Dominique
authors.initials: D
authors.lastname: Contour-Ansel
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