Expression of ascorbate peroxidase and glutathione reductase in roots of rice seedlings in response to NaCl and H2O2
Resource
Journal of Plant Physiology 162 (3): 291-299
Journal
Journal of Plant Physiology
Journal Volume
162
Journal Volume
162
Journal Issue
3
Journal Issue
3
Pages
291-299
Start Page
291
End Page
299
ISSN
01761617
Date Issued
2005-03-14
Author(s)
Abstract
The accumulation of H2O2 by NaCl was observed in the roots of rice seedlings. Treatment with NaCl caused an increase in the activities of ascorbate peroxidase (APX) and glutathione reductase (GR) and the expression of OsAPX and OsGR in rice roots. Exogenously applied H 2O2 also enhanced the activities of APX and GR and the expression of OsAPX and OsGR in rice roots. The accumulation of H 2O2 in rice roots in response to NaCl was inhibited by the NADPH oxidase inhibitors, diphenyleneiodonium chloride (DPI) and imidazole (IMD). However, DPI, IMD, and dimethylthiourea, a H2O2 trap, did not reduce NaCl-enhanced activities of APX and GR and expression of OsAPX and OsGR. It appears that H2O2 is not involved in the regulation of NaCl-induced APX and GR activities and OsAPX and OsGR expression in rice roots.
Subjects
Active oxygen species
Ascorbate peroxidase
Glutathione reductase
Hydrogen peroxide
Oryza sativa
Salt stress
Publisher
Elsevier GmbH
Type
journal article
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