The Plant Journal
Abstract
Nitrogen is one of the most important nutrient element that is essential for plant growth and development. Many genes have been reported to contribute to nitrogen absorption and transportation. However, genes involved in nitrogen reutilization are seldom reported. Ornithine d-aminotransferase (dOAT) is the enzyme connecting arginine cycling and proline cycling. Here, we found that OsOAT, the homologue of dOAT in rice, is essential for nitrogen reutilization through mediating arginase activity. In the Osoat mutant, metabolic abnormality induced by nitrogen deficiency in floret causes malformed glumes, incapable glume opening and anther indehiscence. These defects in the mutant affect the pollination process and lead to a low seed setting rate as well as abnormal seed shape. Intriguingly, urea can rescue the phenotypes of the Osoat mutant. Therefore, OsOAT is crucial for nitrogen reutilization and plays a critical role in floret development and seed setting in rice.
| 论文编号: | DOI:10.1111/tpj.14072 |
| 论文题目: | Ornithine d-aminotransferase is Critical for Floret Development and Seed Setting through Mediating Nitrogen Reutilization in Rice |
| 英文论文题目: | Ornithine d-aminotransferase is Critical for Floret Development and Seed Setting through Mediating Nitrogen Reutilization in Rice |
| 第一作者: | Changzhen Liu, Zhihui Xue, Ding Tang, Yi Shen, Wenqing Shi, Lijun Ren, Guijie Du, Yafei Li, Zhukuan Cheng |
| 英文第一作者: | Changzhen Liu, Zhihui Xue, Ding Tang, Yi Shen, Wenqing Shi, Lijun Ren, Guijie Du, Yafei Li, Zhukuan Cheng |
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| 发表年度: | 2018-09-05 |
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| 摘要: | Nitrogen is one of the most important nutrient element that is essential for plant growth and development. Many genes have been reported to contribute to nitrogen absorption and transportation. However, genes involved in nitrogen reutilization are seldom reported. Ornithine d-aminotransferase ( dOAT) is the enzyme connecting arginine cycling and proline cycling. Here, we found that OsOAT, the homologue of dOAT in rice, is essential for nitrogen reutilization through mediating arginase activity. In the Osoat mutant, metabolic abnormality induced by nitrogen deficiency in floret causes malformed glumes, incapable glume opening and anther indehiscence. These defects in the mutant affect the pollination process and lead to a low seed setting rate as well as abnormal seed shape. Intriguingly, urea can rescue the phenotypes of the Osoat mutant. Therefore, OsOAT is crucial for nitrogen reutilization and plays a critical role in floret development and seed setting in rice. |
| 英文摘要: | Nitrogen is one of the most important nutrient element that is essential for plant growth and development. Many genes have been reported to contribute to nitrogen absorption and transportation. However, genes involved in nitrogen reutilization are seldom reported. Ornithine d-aminotransferase (dOAT) is the enzyme connecting arginine cycling and proline cycling. Here, we found that OsOAT, the homologue of dOAT in rice, is essential for nitrogen reutilization through mediating arginase activity. In the Osoat mutant, metabolic abnormality induced by nitrogen deficiency in floret causes malformed glumes, incapable glume opening and anther indehiscence. These defects in the mutant affect the pollination process and lead to a low seed setting rate as well as abnormal seed shape. Intriguingly, urea can rescue the phenotypes of the Osoat mutant. Therefore, OsOAT is crucial for nitrogen reutilization and plays a critical role in floret development and seed setting in rice. |
| 刊物名称: | The Plant Journal |
| 英文刊物名称: | The Plant Journal |
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| 其它备注: | Changzhen Liu, Zhihui Xue, Ding Tang, Yi Shen, Wenqing Shi, Lijun Ren, Guijie Du, Yafei Li, Zhukuan Cheng. Ornithine d-aminotransferase is Critical for Floret Development and Seed Setting through Mediating Nitrogen Reutilization in Rice. The Plant Journal DOI:10.1111/tpj.14072 |
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