J Integr Plant Biol.

• Mini Review •    

The alleviation of ammonium toxicity in plants

Chengbin Xiao1,2, Yuan Fang1, Suomin Wang2 and Kai He1*   

  1. 1. Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
    2. State Key Laboratory of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China
    *Correspondence: Kai He (hekai@lzu.edu.cn)
  • Received:2022-12-14 Accepted:2023-02-14 Online:2023-03-24

Abstract: Nitrogen (N) is an essential macronutrient for plants and profoundly affects crop yields and qualities. Ammonium (NH4++) and nitrate (NO3?) are major inorganic N forms absorbed by plants from the surrounding environments. Intriguingly, NH4++ is usually toxic to plants when it serves as the sole or dominant N source. It is thus important for plants to coordinate the utilization of NH4+ and the alleviation of NH4++ toxicity. To fully decipher the molecular mechanisms underlying how plants minimize NH4++ toxicity may broadly benefit agricultural practice. In the current minireview, we attempt to discuss recent discoveries in the strategies for mitigating NH4++ toxicity in plants, which may provide potential solutions for improving the nitrogen use efficiency (NUE) and stress adaptions in crops.

Key words: alleviation, ammonium toxicity, channel, nitrogen, NUE, transporter

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