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Physiological, molecular, and environmental insights into plant nitrogen uptake, and metabolism under abiotic stresses

文献类型： 外文期刊

作者： Akhtar, Kashif 1 ; Ain, Noor ul 2 ; Prasad, P. V. Vara 3 ; Naz, Misbah 4 ; Aslam, Mehtab Muhammad 5 ; Djalovic, Ivica 6 ; Riaz, Muhammad 7 ; Ahmad, Shakeel 1 ; Varshney, Rajeev K. 8 ; He, Bing 9 ; Wen, Ronghui 1 ;

作者机构： 1.Guangxi Univ, Coll Life Sci & Technol, State Key Lab Conservat & Utilizat Subtrop Agrobio, Guangxi Key Lab Sugarcane Biol, Nanning 530004, Peoples R China

2.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Genome Anal Lab, Shenzhen Branch,Guangdong Lab Lingnan Modern Agr,M, Shenzhen, Peoples R China

3.Kansas State Univ, Feed Future Innovat Lab Collaborat Res Sustainable, Manhattan, KS USA

4.Jiangsu Univ, Inst Environm & Ecol, Sch Environm & Safety Engn, Zhenjiang, Peoples R China

5.Univ Missouri, Coll Agr Food & Nat Resources CAFNR, Div Plant Sci & Technol, Columbia, MO USA

6.Natl Inst Republ Serbia, Inst Field & Vegetable Crops, Novi Sad, Serbia

7.Govt Coll Univ Faisalabad, Dept Environm Sci & Engn, Faisalabad, Pakistan

8.Murdoch Univ, Food Futures Inst, WA State Agr Biotechnol Ctr, Ctr Crop & Food Innovat, Murdoch, WA, Australia

9.Guangxi Univ, Coll Agr, Guangxi Key Lab Agroenvironm & Agr Prod Safety, Nanning, Peoples R China

期刊名称：PLANT GENOME （ 影响因子：4.2； 五年影响因子：4.7 ）

ISSN：

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Nitrogen (N) as an inorganic macronutrient is inevitable for plant growth, development, and biomass production. Many external factors and stresses, such as acidity, alkalinity, salinity, temperature, oxygen, and rainfall, affect N uptake and metabolism in plants. The uptake of ammonium (NH4+) and nitrate (NO3-) in plants mainly depends on soil properties. Under the sufficient availability of NO3- (>1 mM), low-affinity transport system is activated by gene network NRT1, and under low NO3- availability (<1 mM), high-affinity transport system starts functioning encoded by NRT2 family of genes. Further, under limited N supply due to edaphic and climatic factors, higher expression of the AtNRT2.4 and AtNRT2.5T genes of the NRT2 family occur and are considered as N remobilizing genes. The NH4+ ion is the final form of N assimilated by cells mediated through the key enzymes glutamine synthetase and glutamate synthase. The WRKY1 is a major transcription factor of the N regulation network in plants. However, the transcriptome and metabolite profiles show variations in N assimilation metabolites, including glycine, glutamine, and aspartate, under abiotic stresses. The overexpression of NO3- transporters (OsNRT2.3a and OsNRT1.1b) can significantly improve the biomass and yield of various crops. Altering the expression levels of genes could be a valuable tool to improve N metabolism under the challenging conditions of soil and environment, such as unfavorable temperature, drought, salinity, heavy metals, and nutrient stress.

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