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Reference Detail
| Reference | ||
|---|---|---|
| Author | Zhang D., Zhang M., Liang J. | |
| Title | RGB1 Regulates Grain Development and Starch Accumulation Through Its Effect on <i>OsYUC11</i>-Mediated Auxin Biosynthesis in Rice Endosperm Cells. | |
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Abstract: RGB1, a subunit of heterotrimeric G protein, plays important roles in regulating grain size.and weight of rice. However, the molecular mechanisms underlying controlling grain filling process by G protein are still largely unclear. In the present study, we show that RGB1 controls not only the grain size.but also the grain filling process. Knock-down of <i>RGB1</i> significantly delayed grain development and reduced starch accumulation and grain weight, which was closely related to the delayed and the lower expression of genes encoding sucrose metabolism and starch biosynthesis related enzymes during grain filling stage. Suppression of <i>RGB1</i> expression also resulted in the lower auxin content in grains, which was correlated with the lower expression of <i>OsNF-YB1</i> and <i>OsYUC11</i> during grain filling stage. Further biochemical evidence showed that <i>OsYUC11</i> expression was under control of OsNF-YB1 by its interaction with promoter of <i>OsYUC11</i>. Taken together, we propose that RGB1 controls rice grain development and grain filling process by changing auxin homeostasis in endosperm cells. OsNF-YB1, which acts as a key downstream effector of RGB1, interacts directly with the promoter of <i>OsYUC11</i> and stimulates the <i>OsYUC11</i> expression, thereby regulating auxin biosynthesis and starch accumulation and grain size. |
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| Journal | Front Plant Sci | |
| Country | China | |
| Volume | 12 | |
| Pages | 585174 | |
| Year | 2021 | |
| PubMed ID | 33868323 | |
| PubMed Central ID | 8045708 | |
| DOI | 10.3389/fpls.2021.585174 | |
| URL | - | |
| Relation | ||
| Gene | HAP3K RGB1 YUCCA11 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
|
Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
