Overexpression of the nitrate transporter, OsNRT2.3b, improves rice phosphorus uptake and translocation

文献类型： 外文期刊

第一作者： Feng, Huimin

作者： Feng, Huimin;Zhi, Yang;Li, Ran;Li, Bin;Chen, Jingguang;Xu, Guohua;Fan, Xiaorong;Li, Bin;Chen, Jingguang;Xu, Guohua;Fan, Xiaorong;Xia, Xiudong

作者机构：

关键词： OsNRT2.3b;P uptake;P accumulation;Rice

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

ISSN：

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收录情况： SCI

摘要： Nitrogen (N) and phosphorus (P) are two essential macronutrients for plants. Overexpression of the rice nitrate transporter, OsNRT2.3b, can improve rice grain yield and nitrogen use efficiency (NUE). Here, OsNRT2.3b overexpression resulted in increased grain yield, straw yield, and grain:straw ratio, accompanied by increased P concentrations in the leaf blade, leaf sheath, culm, and unfilled rice hulls. Overexpression of OsNRT2.3b significantly increased (33)Pi uptake compared with WT under 300-mu M Pi but not 10-mu M Pi condition in 24 h. Moreover, the OsNRT2.3b-overexpressing rice lines showed increased root and shoot biomass, root:shoot ratio, total root length root surface area and N, P accumulation under 300- and 10-mu M P-i supply in hydroponic solution. The levels of OsPT2, OsPT8, and OsPHR2 expression in roots and of OsPT1 and OsPHR2 in shoots were upregulated in OsNRT2.3b-overexpressing rice. These results indicated that OsNRT2.3b overexpression can improve rice P uptake and accumulation, partially through the advanced root system, enhanced gene expression, and the phloem pH regulation function.

分类号： Q942

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