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| Reference | ||
|---|---|---|
| Author | Duan E., Wang Y., Li X., Lin Q., Zhang T., Wang Y., Zhou C., Zhang H., Jiang L., Wang J., Lei C., Zhang X., Guo X., Wang H., Wan J. | |
| Title | OsSHI1 Regulates Plant Architecture Through Modulating the Transcriptional Activity of IPA1 in Rice. | |
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Abstract: Tillering and panicle branching are important determinants of plant architecture and yield potential in rice (<i>Oryza sativa</i>). <i>IDEAL PLANT ARCHITECTURE1</i> (<i>IPA1</i>) encodesSQUAMOSA PROMOTER BINDING PROTEIN-LIKE14, which acts as a key transcription factor regulating tiller outgrowth and panicle branching by directly activating the expression of <i>O. sativa TEOSINTE BRANCHED1</i> (<i>OsTB1</i>) and <i>O. sativa DENSE</i><i>AND ERECT PANICLE1</i> (<i>OsDEP1</i>), thereby influencing grain yield in rice. Here, we report the identification of a rice mutant named <i>shi1</i> that is characterized by dramatically reduced tiller number, enhanced culm strength, and increased panicle branch number. Map-based cloning revealed that <i>O. sativa SHORT INTERNODES1</i> (<i>OsSHI1</i>) encodes a plant-specific transcription factor of the SHI family with a characteristic family-specific IGGH domain and a conserved zinc-finger DNA binding domain. Consistent with the mutant phenotype, <i>OsSHI1</i> is predominantly expressed in axillary buds and young panicle, and its encoded protein is exclusively targeted to the nucleus. We show that OsSHI1 physically interacts with IPA1 both in vitro and in vivo. Moreover, OsSHI1 could bind directly to the promoter regions of both <i>OsTB1</i> and <i>OsDEP1</i> through a previously unrecognized cis-element (T/GCTCTAC motif). OsSHI1 repressed the transcriptional activation activity of IPA1 by affecting its DNA binding activity toward the promoters of both <i>OsTB1</i> and <i>OsDEP1</i>, resulting in increased tiller number and diminished panicle size. Taken together, our results demonstrate that OsSHI1 regulates plant architecture through modulating the transcriptional activity of IPA1 and provide insight into the establishment of plant architecture in rice. |
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| Journal | Plant Cell | |
| Country | China | |
| Volume | 31(5) | |
| Pages | 1026-1042 | |
| Year | 2019 | |
| PubMed ID | 30914468 | |
| PubMed Central ID | 6533028 | |
| DOI | 10.1105/tpc.19.00023 | |
| URL | - | |
| Relation | ||
| Gene | DEP1 FC1 SHI1 WFP | |
| 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 | - | |
