文献类型： 外文期刊

作者： Li, Huiqiang ¹ ; Yu, Meiqin ¹ ; Zhu, Xiaobo ¹ ; Nai, Furong ¹ ; Yang, Ruirui ¹ ; Wang, Lulu ⁴ ; Liu, Yanpei ¹ ; Wei, Yihao ² ; Ma, Xinming ³ ; Yu, Haidong ¹ ; Wang, Xiaochun ¹ ;

作者机构： 1.Henan Agr Univ, Coll Life Sci, Zhengzhou 450046, Henan, Peoples R China

2.Henan Agr Univ, Coll Life Sci, Res & Expt Stn Nitrogen & Phosphorus Loss Farmland, Zhengzhou 450046, Henan, Peoples R China

3.Henan Acad Agr Sci, Ind Crops Res Inst, Zhengzhou 450002, Henan, Peoples R China

4.Henan Agr Univ, Coll Agron, Collaborat Innovat Ctr Henan Grain Crops, Zhengzhou 450046, Henan, Peoples R China

关键词： TaGSr; Nitrogen levels; Nitrogen uptake; Nitrogen assimilation; Arabidopsis

期刊名称：ENVIRONMENTAL AND EXPERIMENTAL BOTANY （ 影响因子：5.7； 五年影响因子：6.0 ）

ISSN： 0098-8472

年卷期： 2024 年 219 卷

页码：

收录情况： SCI

摘要： Glutamine synthetase (GS) is a key enzyme that assimilates ammonium to form glutamine. However, little is known about the function of TaGSr (Triticum aestivum L. root glutamine synthetase) in nitrogen metabolism in wheat. In this study, we evaluated the effects of ectopic expression of TaGSr from wheat on nitrogen uptake, assimilation, and accumulation in Arabidopsis under low nitrogen (LN) conditions. TaGSr was mainly expressed in vascular tissues and dramatically induced by nitrogen deficiency treatment. The transcripts of the TaGSr-4A and TaGSr-4D were relatively more abundant compared with TaGSr-4B. We observed that the growth performance of ectopic expression of TaGSr from wheat in Arabidopsis transgenic plants were better than that of Col-0. The dry weight, NO3- -N, NH4+-N, free amino acid content, the total N accumulation of shoot in TaGSr Arabidopsis were significantly higher than that of Col-0 under both low and high nitrogen conditions. In conclusion, TaGSr positively promotes the growth and biomass of Arabidopsis via up-regulating expression of genes involved in N uptake, transport and assimilation, significantly contributing to the tolerance to LN stress.