The Plant Journal
Abstract
Highly coordinated pollen wall patterning is essential for male reproductive development. Here, we report the identification ofDefective Microspore Development1(DMD1), which encodes a nuclear‐localized protein possessing transactivation activity.DMD1is preferentially expressed in the tapetum and microspores during postmeiotic development. Mutations inDMD1cause a male sterile phenotype with impaired microspore cell integrity. The mutants display abnormal callose degradation, accompanying with inhibited primexine thickening in the newly released microspores. Several genes associated with callose degradation and primexine formation are down‐regulated indmd1anthers. In addition, irregular Ubisch body morphology and discontinuous endexine occur, and the baculum is completely absent indmd1. DMD1 interacts with Tapetum Degeneration Retardation (TDR), a basic helix‐loop‐helix transcription factor required for exine formation. Taken together, our results suggest thatDMD1is responsible for microspore cell integrity, primexine formation, and exine pattern formation during rice microspore development.
| 论文编号: | DOI:10.1111/tpj.14811 |
| 论文题目: | Defective Microspore Development1 is Required for Microspore Cell Integrity and Pollen Wall Formation in Rice |
| 英文论文题目: | Defective Microspore Development1 is Required for Microspore Cell Integrity and Pollen Wall Formation in Rice |
| 第一作者: | Lijun Ren, Tingting Zhao, Lei Zhang, Guijie Du, Yi Shen, Ding Tang, Yafei Li, Qiong Luo, Zhukuan Cheng |
| 英文第一作者: | Lijun Ren, Tingting Zhao, Lei Zhang, Guijie Du, Yi Shen, Ding Tang, Yafei Li, Qiong Luo, Zhukuan Cheng |
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| 发表年度: | 2020-05-26 |
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| 摘要: | Highly coordinated pollen wall patterning is essential for male reproductive development. Here, we report the identification ofDefective Microspore Development1(DMD1), which encodes a nuclear‐localized protein possessing transactivation activity.DMD1is preferentially expressed in the tapetum and microspores during postmeiotic development. Mutations inDMD1cause a male sterile phenotype with impaired microspore cell integrity. The mutants display abnormal callose degradation, accompanying with inhibited primexine thickening in the newly released microspores. Several genes associated with callose degradation and primexine formation are down‐regulated indmd1anthers. In addition, irregular Ubisch body morphology and discontinuous endexine occur, and the baculum is completely absent indmd1. DMD1 interacts with Tapetum Degeneration Retardation (TDR), a basic helix‐loop‐helix transcription factor required for exine formation. Taken together, our results suggest thatDMD1is responsible for microspore cell integrity, primexine formation, and exine pattern formation during rice microspore development. |
| 英文摘要: | Highly coordinated pollen wall patterning is essential for male reproductive development. Here, we report the identification ofDefective Microspore Development1(DMD1), which encodes a nuclear‐localized protein possessing transactivation activity.DMD1is preferentially expressed in the tapetum and microspores during postmeiotic development. Mutations inDMD1cause a male sterile phenotype with impaired microspore cell integrity. The mutants display abnormal callose degradation, accompanying with inhibited primexine thickening in the newly released microspores. Several genes associated with callose degradation and primexine formation are down‐regulated indmd1anthers. In addition, irregular Ubisch body morphology and discontinuous endexine occur, and the baculum is completely absent indmd1. DMD1 interacts with Tapetum Degeneration Retardation (TDR), a basic helix‐loop‐helix transcription factor required for exine formation. Taken together, our results suggest thatDMD1is responsible for microspore cell integrity, primexine formation, and exine pattern formation during rice microspore development. |
| 刊物名称: | The Plant Journal |
| 英文刊物名称: | The Plant Journal |
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| 其它备注: | Lijun Ren, Tingting Zhao, Lei Zhang, Guijie Du, Yi Shen, Ding Tang, Yafei Li, Qiong Luo, Zhukuan Cheng. Defective Microspore Development1 is Required for Microspore Cell Integrity and Pollen Wall Formation in Rice. The Plant Journal. DOI:10.1111/tpj.14811. |
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