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Author Li C.R., Liang D.D., Li J., Duan Y.B., Li H., Yang Y.C., Qin R.Y., Li L., Wei P.C., Yang J.B.
Title Unravelling mitochondrial retrograde regulation in the abiotic stress induction of rice ALTERNATIVE OXIDASE 1 genes.
Abstract:
Mitochondrial retrograde regulation (MRR) is the transduction of mitochondrial signals to mediate nuclear gene expression. It is not clear whether MRR is a common regulation mechanism in plant abiotic stress response. In this study, we analysed the early abiotic stress response of the rice OsAOX1 genes, and the induction of OsAOX1a and OsAOX1b (OsAOX1a/b) was selected as a working model for the stress-induced MRR studies. We found that the induction mediated by the superoxide ion (O2ツキ(-) )-generating chemical methyl viologen was stronger than that of hydrogen peroxide (H2 O2 ). The addition of reactive oxygen species (ROS) scavengers demonstrated that the stress induction was reduced by eliminating O2ツキ(-) . Furthermore, the stress induction did not rely on chloroplast- or cytosol-derived O2ツキ(-) . Next, we generated transgenic plants overexpressing the superoxide dismutase (SOD) gene at different subcellular locations. The results suggest that only the mitochondrial SOD, OsMSD, attenuated the stress induction of OsAOX1a/b specifically. Therefore, our findings demonstrate that abiotic stress initiates the MRR on OsAOX1a/b and that mitochondrial O2ツキ(-) is involved in the process.
Journal Plant Cell Environ.
Country China
Volume 36(4)
Pages 775-88
Year 2013
PubMed ID 22994594
PubMed Central ID -
DOI 10.1111/pce.12013
URL -
Relation
Gene AOX1A AOX1B AOX1C SOD4 SODA1 SODCC1
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 -
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