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Author Shi B., Ni L., Liu Y., Zhang A., Tan M., Jiang M.
Title OsDMI3-mediated activation of OsMPK1 regulates the activities of antioxidant enzymes in abscisic acid signalling in rice.
Abstract:
In rice, the Ca(2+) /calmodulin (CaM)-dependent protein kinase (CCaMK) OsDMI3 has been shown to be required for abscisic acid (ABA)-induced antioxidant defence. However, it is not clear how OsDMI3 participates in this process in rice. In this study, the cross-talk between OsDMI3 and the major ABA-activated MAPK OsMPK1 in ABA-induced antioxidant defence was investigated. ABA treatment induced the expression of OsDMI3 and OsMPK1 and the activities of OsDMI3 and OsMPK1 in rice leaves. In the mutant of OsDMI3, the ABA-induced increases in the expression and the activity of OsMPK1 were substantially reduced. But in the mutant of OsMPK1, the ABA-induced increases in the expression and the activity of OsDMI3 were not affected. Pretreatments with MAPKK inhibitors also did not affect the ABA-induced activation of OsDMI3. Further, a transient expression analysis in combination with mutant analysis in rice protoplasts showed that OsMPK1 is required for OsDMI3-induced increases in the activities of antioxidant enzymes and the production of H2 O2 . Our data indicate that there exists a cross-talk between OsDMI3 and OsMPK1 in ABA signalling, in which OsDMI3 functions upstream of OsMPK1 to regulate the activities of antioxidant enzymes and the production of H2 O2 in rice.
Journal Plant Cell Environ.
Country China
Volume
Pages
Year 2013
PubMed ID 23777258
PubMed Central ID -
DOI 10.1111/pce.12154
URL -
Relation
Gene DMI3 DSG1 IPD3
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain 		-
Stages in Each Organ
- Muant Lines (Gene) 		-
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase