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Reference Detail
| Reference | ||
|---|---|---|
| Author | Chen H., Ma B., Zhou Y., He S.J., Tang S.Y., Lu X., Xie Q., Chen S.Y., Zhang J.S. | |
| Title | E3 Ubiquitin ligase SOR1 regulates ethylene response in rice root by modulating stability of Aux/IAA protein. | |
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Abstract: Plant hormones ethylene and auxin synergistically regulate plant root growth and development. Ubiquitin-mediated proteolysis of Aux/IAA transcriptional repressors by the E3 Ubiquitin ligase SCFTIR1/AFB triggers a transcription-based auxin signaling. Here we show that rice (<i>Oryza sativa</i> L.) soil-surface rooting 1 (SOR1), which is a RING finger E3 Ubiquitin ligase identified from analysis of a rice ethylene-insensitive mutant <i>mhz2/SOR1-2</i>, controls root-specific ethylene responses by modulating Aux/IAA protein stability. SOR1 physically interacts with OsIAA26 and OsIAA9, which are atypical and canonical Aux/IAA proteins, respectively. SOR1 targets OsIAA26 for Ubiquitin/26S proteasome-mediated degradation, whereas OsIAA9 protects the OsIAA26 protein from degradation by inhibiting the E3 activity of SOR1. Auxin promotes SOR1-dependent degradation of OsIAA26 by facilitating SCFOsTIR1/AFB2-mediated and SOR1-assisted destabilization of OsIAA9 protein. Our study provides a candidate mechanism by which the SOR1-OsIAA26 module acts downstream of the OsTIR1/AFB2-auxin-OsIAA9 signaling to modulate ethylene inhibition of root growth in rice seedlings. |
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| Journal | Proc. Natl. Acad. Sci. U.S.A. | |
| Country | China | |
| Volume | 115(17) | |
| Pages | 4513-4518 | |
| Year | 2018 | |
| PubMed ID | 29632179 | |
| PubMed Central ID | 5924906 | |
| DOI | 10.1073/pnas.1719387115 | |
| URL | - | |
| Relation | ||
| Gene | EIN2 FBOX206 IAA20 IAA26 IAA9 SOR1 TIR1 | |
| 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 | - | |
