Does energy cost constitute the primary cause of ammonium toxicity in plants?

文献类型： 外文期刊

第一作者： Kong, Lingan

作者： Kong, Lingan;Zhang, Yunxiu;Zhang, Bin;Li, Huawei;Wang, Zongshuai;Si, Jisheng;Feng, Bo;Kong, Lingan;Fan, Shoujin

作者机构：

关键词： Ammonium toxicity; Energy consumption; H+-ATPase; Nitrogen uptake and assimilation; Tricarboxylic acid cycle

期刊名称：PLANTA （ 影响因子：4.54； 五年影响因子：4.689 ）

ISSN： 0032-0935

年卷期： 2022 年 256 卷 3 期

页码：

收录情况： SCI

摘要： Nitrate (NO3-) and ammonium (NH4+) are the main nitrogen (N) sources and key determinants for plant growth and development. In recent decades, NH4+, which is a double-sided N compound, has attracted considerable amounts of attention from researchers. Elucidating the mechanisms of NH4+ toxicity and exploring the means to overcome this toxicity are necessary to improve agricultural sustainability. In this review, we discuss the current knowledge concerning the energy consumption and production underlying NH4+ metabolism and toxicity in plants, such as N uptake; assimilation; cellular pH homeostasis; and functions of the plasma membrane (PM), vacuolar H+-ATPase and H+-pyrophosphatase (H+-PPase). We also discuss whether the overconsumption of energy is the primary cause of NH4+ toxicity or constitutes a fundamental strategy for plants to adapt to high-NH4+ stress. In addition, the effects of regulators on energy production and consumption and other physiological processes are listed for evaluating the possibility of high energy costs associated with NH4+ toxicity. This review is helpful for exploring the tolerance mechanisms and for developing NH4+-tolerant varieties as well as agronomic techniques to alleviate the effects of NH4+ stress in the field.

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