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| 文献 | ||
|---|---|---|
| 著者 | Luo B., Chen J., Zhu L., Liu S., Li B., Lu H., Ye G., Xu G., Fan X. | |
| タイトル | Overexpression of a High-Affinity Nitrate Transporter <i>OsNRT2.1</i> Increases Yield and Manganese Accumulation in Rice Under Alternating Wet and Dry Condition. | |
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Abstract: Nitrate and manganese (Mn) are necessary elements for the growth and development of rice in paddy soil. Under physiological conditions, we previously reported that the uptake of Mn in roots can be improved by the addition of external nitrate but not ammonium. To investigate the mechanism(s) of this phenotype, we produced plant lines overexpressing <i>OsNRT2.1</i> and assessed Mn uptake under alternating wet and dry (AWD) and waterlogged (WL) conditions. Under AWD condition, we observed a 31% reduction in grain yields of wild type (WT) plants compared to WL condition. Interestingly, the overexpression of <i>OsNRT2.1</i> could recover this loss, as <i>OsNRT2.1</i> transgenic lines displayed higher grain yields than WT plants. We also observed 60% higher grain Mn in the transgenic lines in AWD condition and approximately 30% higher Mn in the grain of transgenic lines in WL condition. We further found that the overexpression of <i>OsNRT2.1</i> did not alter Mg and Fe in the seeds in either growth condition. The reasons for the increased Mn content in <i>OsNRT2.1</i> transgenic seeds in AWD condition could be explained by the elevated expression of <i>OsNRAMP</i> family genes including <i>OsNRAMP3, OsNRAMP5</i>, and <i>OsNRAMP6</i> in node I, the panicle-neck, and the flag leaves. The mechanism(s) underpinning the upregulation of these genes requires further investigation. Taken together, our results provide a new function of <i>OsNRT2.1</i> in improving rice yields and grain Mn accumulation during water-saving cultivation patterns. This represents a new strategy for maintaining yield and improving food quality in a sustainable agricultural system. |
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| 掲載誌 | Front Plant Sci | |
| Country | China | |
| 刊数 | 9 | |
| ページ | 1192 | |
| 発刊年 | 2018 | |
| PubMed ID | 30158947 | |
| PubMed Central ID | 6104626 | |
| DOI | 10.3389/fpls.2018.01192 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | LCD1 NRAMP3 NRAMP6 NRT2.1 | |
| INSD | - | |
| 系統 |
野生イネ コアコレクション |
- |
| 突然変異系統(遺伝研 Collection) | - | |
| 種子不稔系統 | - | |
| 致死変異体系統 | - | |
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組織別発生段階 - 突然変異系統(遺伝子) |
- | |
| 栽培イネ品種(遺伝研 Collection) | - | |
| 組織別発生段階 | - | |
