NDLI: Nitric oxide is involved in the regulation of ascorbate and glutathione metabolism in Agropyron cristatum leaves under water stress

Content Provider	Springer Nature Link
Author	Shan, C. He, F. Xu, G. Han, R. Liang, Z.
Copyright Year	2012
Abstract	This study investigated the regulation of ascorbate and glutathione metabolism by nitric oxide in Agropyron cristatum leaves under water stress. The activities of ascorbate peroxidase (APX), glutathione reductase (GR), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), L-galactono-1,4-lactone dehydrogenase (GalLDH) and γ-glutamylcysteine synthetase (γ-ECS), and the contents of NO, reduced ascorbic acid (AsA), reduced glutathione (GSH), total ascorbate and total glutathione increased under water stress. These increases were suppressed by pretreatments with NO synthesis inhibitors N G-nitro-L-arginine methyl ester (L-NAME) and 4-carboxyphenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO). However, application of L-NAME and cPTIO to plants sufficiently supplied with water did not affect the activities of above mentioned enzymes and the contents of NO and above mentioned antioxidants. Pretreatments with L-NAME and cPTIO increased the malondialdehyde (MDA) content and electrolyte leakage of plants under water stress. Our results suggested that water stress-induced NO is a signal that leads to the upregulation of ascorbate and glutathione metabolism and has important role for acquisition of water stress tolerance.
Starting Page	187
Ending Page	191
Page Count	5
File Format	PDF
ISSN	00063134
Journal	Biologia Plantarum
Volume Number	56
Issue Number	1
e-ISSN	15738264
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-01-21
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science Horticulture

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