(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 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.
Cruz de Carvalho
Maria Helena
MH
Laboratoire d'Ecophysiologie Moléculaire; UMR IRD 137 BioSol; Université Paris Est-Paris 12; Créteil France.
Contour-Ansel
Dominique
D
J Exp Bot. 2000 Jan;51(342):107-13
10938801
Environ Exp Bot. 2000 Jun 1;43(3):227-237
10725522
J Exp Bot. 2002 May;53(372):1283-304
11997376
Plant Physiol. 2001 Aug;126(4):1706-15
11500568
Plant Signal Behav. 2008 Mar;3(3):156-65
19513210
Plant Physiol. 1999 Nov;121(3):879-88
10557236
Plant Physiol. 1999 Mar;119(3):1091-100
10069848
J Plant Physiol. 2008;165(5):514-21
17707549
Plant Physiol. 2007 Jun;144(2):1104-14
17468213
Trends Plant Sci. 2002 Sep;7(9):405-10
12234732
Mol Plant Microbe Interact. 2003 Nov;16(11):1039-46
14601672
Ann Bot. 2006 Dec;98(6):1279-87
17008354
Mol Plant Microbe Interact. 2001 Oct;14(10):1189-96
11605958
Annu Rev Plant Physiol Plant Mol Biol. 1998 Jun;49:249-279
15012235
Proc Natl Acad Sci U S A. 1986 Jun;83(11):3811-5
16593704