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Reference Detail
| Reference | ||
|---|---|---|
| Author | Kim S., Park S.I., Kwon H., Cho M.H., Kim B.G., Chung J.H., Nam M.H., Song J.S., Kim K.H., Yoon I.S. | |
| Title | The Rice Abscisic Acid-Responsive RING Finger E3 ligase OsRF1 Targets OsPP2C09 for Degradation and Confers Drought and Salinity Tolerance in Rice. | |
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Abstract: Drought and salinity are major important factors that restrain growth and productivity of rice. In plants, many really interesting new gene (RING) finger proteins have been reported to enhance drought and salt tolerance. However, their mode of action and interacting substrates are largely unknown. Here, we identified a new small RING-H2 type E3 ligase <i>OsRF1</i>, which is involved in the ABA and stress responses of rice. <i>OsRF1</i> transcripts were highly induced by ABA, salt, or drought treatment. Upregulation of <i>OsRF1</i> in transgenic rice conferred drought and salt tolerance and increased endogenous ABA levels. Consistent with this, faster transcriptional activation of key ABA biosynthetic genes, <i>ZEP, NCED3</i>, and <i>ABA4</i>, was observed in <i>OsRF1</i>-OE plants compared with wild type in response to drought stress. Yeast two-hybrid assay, BiFC, and co-immunoprecipitation analysis identified clade A PP2C proteins as direct interacting partners with OsRF1. <i>In vitro</i> ubiquitination assay indicated that OsRF1 exhibited E3 ligase activity, and that it targeted OsPP2C09 protein for ubiquitination and degradation. Cell-free degradation assay further showed that the OsPP2C09 protein is more rapidly degraded by ABA in the <i>OsRF1</i>-OE rice than in the wild type. The combined results suggested that OsRF1 is a positive player of stress responses by modulating protein stability of clade A PP2C proteins, negative regulators of ABA signaling. |
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| Journal | Front Plant Sci | |
| Country | South Korea | |
| Volume | 12 | |
| Pages | 797940 | |
| Year | 2021 | |
| PubMed ID | 35095969 | |
| PubMed Central ID | 8792764 | |
| DOI | 10.3389/fpls.2021.797940 | |
| URL | - | |
| Relation | ||
| Gene | ABA1 ABA3 NCED3 PP2C30 PP2C50 PP2C53 PP2C9 RF1 SLR1 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
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Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
