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Reference Detail
| Reference | ||
|---|---|---|
| Author | Hwang O.J., Back K. | |
| Title | Molecular Regulation of Antioxidant Melatonin Biosynthesis by Brassinosteroid Acting as an Endogenous Elicitor of Melatonin Induction in Rice Seedlings. | |
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Abstract: Gibberellic acid (GA) was recently shown to induce melatonin synthesis in rice. Here, we examined whether brassinosteroids (BRs) also induce melatonin synthesis because BRs and GA show redundancy in many functions. Among several plant hormones, exogenous BR treatment induced melatonin synthesis by twofold compared to control treatment, whereas ethylene, 6-benzylaminopurine (BA), and indole-3-acetic acid (IAA) showed negligible effects on melatonin synthesis. Correspondingly, BR treatment also induced a number of melatonin biosynthetic genes in conjunction with the suppression of melatonin catabolic gene expression. Several transgenic rice plants with downregulated BR biosynthesis-related genes, such as <i>DWARF4</i>, <i>DWARF11</i>, and <i>RAV-Like1</i> (<i>RAVL1</i>), were generated and exhibited decreased melatonin synthesis, indicating that BRs act as endogenous elicitors of melatonin synthesis. Notably, treatment with either GA or BR fully restored melatonin synthesis in the presence of paclobutrazol, a GA biosynthesis inhibitor. Moreover, exogenous BR treatment partially restored melatonin synthesis in both <i>RAVL1</i> and <i>Galpha</i> RNAi transgenic rice plants, whereas GA treatment fully restored melatonin synthesis comparable to wild type in <i>RAVL1</i> RNAi plants. Taken together, our results highlight a role of BR as an endogenous elicitor of melatonin synthesis in a GA-independent manner in rice plants. |
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| Journal | Antioxidants (Basel) | |
| Country | South Korea | |
| Volume | 11(5) | |
| Pages | ||
| Year | 2022 | |
| PubMed ID | 35624782 | |
| PubMed Central ID | 9137740 | |
| DOI | 10.3390/antiox11050918 | |
| URL | - | |
| Relation | ||
| Gene | 2ODD11 ASMT1 D11 D2 D61 HDAC10 RAVL1 ROMT9 SL TDC1 TDC2 TDC3 | |
| 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 | - | |
