Synergistic and antagonistic interactions between potassium and magnesium in higher plants

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Xie, Kailiu and Çakmak, İsmail and Wang, Shiyu and Zhang, Fusuo and Guo, Shiwei (2021) Synergistic and antagonistic interactions between potassium and magnesium in higher plants. Crop Journal, 9 (2). pp. 249-256. ISSN 2095-5421 (Print) 2214-5141 (Online)

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Abstract

Magnesium (Mg) affects various critical physiological and biochemical processes in higher plants, and its deficiency impedes plant growth and development. Although potassium (K)-induced Mg deficiency in agricultural production is widespread, the specific relationship of K with Mg and especially its competitive nature is poorly understood. This review summarizes current knowledge on the interactions between K and Mg with respect to their root uptake, root-to-shoot translocation and distribution in plants. Their synergistic effects on certain physiological functions are also described. The antagonistic effect of K on Mg is stronger than that of Mg on K in root absorption and transport within plants, indicating that the balanced use of K and Mg fertilizers is necessary for sustaining high plant-available Mg and alleviating K-induced Mg deficiency, especially in plant species with high K demand or in high-available-K soil. The relationship between Mg and K in plant tissues may be antagonistic or synergistic depending on plant species, cell type, leaf age, source- and sink organs. There are synergistic effects of K and Mg on photosynthesis, carbohydrate transport and allocation, nitrogen metabolism, and turgor regulation. Definition of optimal K/Mg ratios for soils and plant tissues is desirable for maintaining proper nutritional status in plants, leading to a physiological state supporting crop production. Future research should concentrate on identifying the physiological and molecular mechanisms underlying the interactions between K and Mg in a given physiological function.
Item Type: Article
Uncontrolled Keywords: Antagonism; Functional replacement; Magnesium; Potassium; Synergy
Divisions: Faculty of Engineering and Natural Sciences
Depositing User: İsmail Çakmak
Date Deposited: 02 Sep 2022 23:44
Last Modified: 02 Sep 2022 23:44
URI: https://research.sabanciuniv.edu/id/eprint/43388

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