Expression of ascorbate peroxidase and glutathione reductase in roots of rice seedlings in response to NaCl and H2O2.
J Plant Physiol
; 162(3): 291-9, 2005 Mar.
Article
en En
| MEDLINE
| ID: mdl-15832681
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 H2O2 also enhanced the activities of APX and GR and the expression of OsAPX and OsGR in rice roots. The accumulation of H2O2 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.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Peroxidasas
/
Cloruro de Sodio
/
Regulación de la Expresión Génica de las Plantas
/
Glutatión Reductasa
/
Peróxido de Hidrógeno
Idioma:
En
Revista:
J Plant Physiol
Asunto de la revista:
BOTANICA
Año:
2005
Tipo del documento:
Article
País de afiliación:
China