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Reference Detail
| Reference | ||
|---|---|---|
| Author | Yao Y., Xiang D., Wu N., Wang Y., Chen Y., Yuan Y., Ye Y., Hu D., Zheng C., Yan Y., Lv Q., Li X., Chen G., Hu H., Xiong H., Peng S., Xiong L. | |
| Title | Control of rice ratooning ability by a nucleoredoxin that inhibits histidine kinase dimerization to attenuate cytokinin signaling in axillary bud growth. | |
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Abstract: Rice ratooning, fast outgrowth of dormant buds on stubble, is an important cropping practice to increase rice yield. However, low ratooning ability (RA) for most rice varieties directly restricts the application of this cost-efficient system, and the genetic basis of RA remains unknown. Here, the genetic architecture of RA was first dissected by a genome-wide association study in a natural rice population. Rice ratooning ability 3 (RRA3), encoding an unreported nucleoredoxin involved in reduction of disulfide bonds, was characterized as the causal gene of a major locus controlling RA. Over-expression of RRA3 in rice significantly accelerated leaf senescence and reduced RA, whereas knockout of RRA3 significantly delayed the leaf senescence and improved both RA and ratoon yield. RRA3 was found to interact with Oryza sativa Histidine Kinase 4 (OHK4), a cytokinin receptor, and inhibit the dimerization of OHK4 through disulfide bond reduction. This inhibition ultimately led to decreased cytokinin signaling and reduced RA. In addition, the causal variations in the RRA3 promoter were identified to be associated with RA. Introgression of a superior haplotype with weak expression of RRA3 into the elite rice variety Guichao2 significantly increased RA and ratoon yield by 23.8%. This study not only uncovers an undocumented regulatory mechanism of cytokinin signaling through de-dimerization of histidine kinase receptor, but also provides an eximious gene with promising value in ratoon rice breeding. |
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| Journal | Mol Plant | |
| Country | China | |
| Volume | ||
| Pages | ||
| Year | 2023 | |
| PubMed ID | 37853691 | |
| PubMed Central ID | - | |
| DOI | 10.1016/j.molp.2023.10.009 | |
| URL | - | |
| Relation | ||
| Gene | PAL1 RRA3 | |
| 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 | - | |
