The Plant Cell
Abstract
Plant lateral branches are important for plant architecture and plant production, but how plants determine their lateral branches remains to be further understood. Here we report that the CUC2/3-DA1-UBP15 regulatory module controls the initiation of axillary meristems, thereby determining the number of lateral branches in Arabidopsis. Mutation in the ubiquitin-dependent peptidase DA1 causes fewer lateral branches due to defects in the initiation of axillary meristems. The transcription factors CUC2 and CUC3, which regulate the axillary meristem initiation, directly bind to the DA1 promoter and activate its expression. Further results show that the ubiquitin specific protease UBP15, which is a direct substrate of DA1 peptidase, represses the initiation of axillary meristems. Genetic analyses support that CUC2/3, DA1, and UBP15 function, at least in part, in a common pathway to regulate the initiation of axillary meristems. Therefore, our findings discover a novel genetic and molecular framework by which the CUC2/3-DA1-UBP15 regulatory module controls the initiation of axillary meristems, thereby determining plant architecture.
论文编号: | DOI:10.1105/tpc.20.00012 |
论文题目: | Control of Plant Branching by the CUC2/CUC3-DA1-UBP15 Regulatory Module |
英文论文题目: | Control of Plant Branching by the CUC2/CUC3-DA1-UBP15 Regulatory Module |
第一作者: | Yu Li, Tian Xia, Fan Gao, Yunhai Li |
英文第一作者: | Yu Li, Tian Xia, Fan Gao, Yunhai Li |
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发表年度: | 2020-04-13 |
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摘要: | Plant lateral branches are important for plant architecture and plant production, but how plants determine their lateral branches remains to be further understood. Here we report that the CUC2/3-DA1-UBP15 regulatory module controls the initiation of axillary meristems, thereby determining the number of lateral branches in Arabidopsis. Mutation in the ubiquitin-dependent peptidase DA1 causes fewer lateral branches due to defects in the initiation of axillary meristems. The transcription factors CUC2 and CUC3, which regulate the axillary meristem initiation, directly bind to the DA1 promoter and activate its expression. Further results show that the ubiquitin specific protease UBP15, which is a direct substrate of DA1 peptidase, represses the initiation of axillary meristems. Genetic analyses support that CUC2/3, DA1, and UBP15 function, at least in part, in a common pathway to regulate the initiation of axillary meristems. Therefore, our findings discover a novel genetic and molecular framework by which the CUC2/3-DA1-UBP15 regulatory module controls the initiation of axillary meristems, thereby determining plant architecture. |
英文摘要: | Plant lateral branches are important for plant architecture and plant production, but how plants determine their lateral branches remains to be further understood. Here we report that the CUC2/3-DA1-UBP15 regulatory module controls the initiation of axillary meristems, thereby determining the number of lateral branches in Arabidopsis. Mutation in the ubiquitin-dependent peptidase DA1 causes fewer lateral branches due to defects in the initiation of axillary meristems. The transcription factors CUC2 and CUC3, which regulate the axillary meristem initiation, directly bind to the DA1 promoter and activate its expression. Further results show that the ubiquitin specific protease UBP15, which is a direct substrate of DA1 peptidase, represses the initiation of axillary meristems. Genetic analyses support that CUC2/3, DA1, and UBP15 function, at least in part, in a common pathway to regulate the initiation of axillary meristems. Therefore, our findings discover a novel genetic and molecular framework by which the CUC2/3-DA1-UBP15 regulatory module controls the initiation of axillary meristems, thereby determining plant architecture. |
刊物名称: | The Plant Cell |
英文刊物名称: | The Plant Cell |
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其它备注: | Yu Li, Tian Xia, Fan Gao, Yunhai Li. Control of Plant Branching by the CUC2/CUC3-DA1-UBP15 Regulatory Module. The Plant Cell. DOI:10.1105/tpc.20.00012 |
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