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Reference Detail
| Reference | ||
|---|---|---|
| Author | Baek D., Hong S., Kim H.J., Moon S., Jung K.H., Yang W.T., Kim D.H. | |
| Title | OsMYB58 Negatively Regulates Plant Growth and Development by Regulating Phosphate Homeostasis. | |
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Abstract: Phosphate (Pi) starvation is a critical factor limiting crop growth, development, and productivity. Rice (<i>Oryza sativa</i>) R2R3-MYB transcription factors function in the transcriptional regulation of plant responses to various abiotic stresses and micronutrient deprivation, but little is known about their roles in Pi starvation signaling and Pi homeostasis. Here, we identified the R2R3-MYB transcription factor gene <i>OsMYB58</i>, which shares high sequence similarity with <i>AtMYB58</i>. <i>OsMYB58</i> expression was induced more strongly by Pi starvation than by other micronutrient deficiencies. Overexpressing <i>OsMYB58</i> in <i>Arabidopsis thaliana</i> and rice inhibited plant growth and development under Pi-deficient conditions. In addition, the overexpression of <i>OsMYB58</i> in plants exposed to Pi deficiency strongly affected root development, including seminal root, lateral root, and root hair formation. Overexpressing <i>OsMYB58</i> strongly decreased the expression of the rice microRNAs <i>OsmiR399a</i> and <i>OsmiR399j</i>. By contrast, overexpressing <i>OsMYB58</i> strongly increased the expression of rice <i>PHOSPHATE 2</i> (<i>OsPHO2</i>), whose expression is repressed by miR399 during Pi starvation signaling. OsMYB58 functions as a transcriptional repressor of the expression of its target genes, as determined by a transcriptional activity assay. These results demonstrate that OsMYB58 negatively regulates <i>OsmiR399</i>-dependent Pi starvation signaling by enhancing <i>OsmiR399s</i> expression. |
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| Journal | Int J Mol Sci | |
| Country | South Korea | |
| Volume | 25(4) | |
| Pages | ||
| Year | 2024 | |
| PubMed ID | 38396886 | |
| PubMed Central ID | 10889527 | |
| DOI | 10.3390/ijms25042209 | |
| URL | - | |
| Relation | ||
| Gene | LTN1 MIR399A MIR399J _ | |
| 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 | - | |
