数字农科院2.0

Overexpression of rice OsNRT1.1A/OsNPF6.3 enhanced the nitrogen use efficiency of wheat under low nitrogen conditions

文献类型： 外文期刊

作者： Wang, Huanhuan;Wang, Wei;Xie, Zhencheng;Yang, Yuxin;Dai, Hongyong;Shi, Feng;Ma, Liang;Sui, Zhifeng;Xia, Chuan;Kong, Xiuying;Zhang, Lichao

作者机构：

关键词： Grain yield per plant;Low nitrogen tolerance;Nitrogen use efficiency;OsNRT1.1A;Wheat (Triticum aestivum)

期刊名称： PLANTA

ISSN： 0032-0935

年卷期： 2024 年 259 卷 6 期

页码：

收录情况： SCIE（2024版）

摘要： The application of inorganic nitrogen (N) fertilizers is a major driving force for crop yield improvement. However, the overuse of fertilizers significantly raises production costs and leads to environmental problems, making it critical to enhance crop nitrogen use efficiency (NUE) for the sake of sustainable agriculture. In this study, we created a series of transgenic wheat lines carrying the rice OsNRT1.1A gene, which encodes a nitrate transporter, to investigate its possible application in improving NUE in wheat. The transgenic wheat exhibited traits such as early maturation that were highly consistent with the overexpression of OsNRT1.1A in Arabidopsis and rice. However, we also observed that overexpression of the OsNRT1.1A gene in wheat can facilitate the growth of roots under low N conditions but has no effect on other aspects of growth and development under normal N conditions. Thus, it may lead to the improvement of wheat low N tolerance, which is different from the effects reported in other plants. A field trial analysis showed that transgenic wheat exhibited increased grain yield per plant under low N conditions. Moreover, transcriptome analysis indicated that OsNRT1.1A increased the expression levels of N uptake and utilization genes in wheat, thereby promoting plant growth under low N conditions. Taken together, our results indicated that OsNRT1.1A plays an important role in improving NUE in wheat with low N availability.

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