Synergistic and antagonistic interactions between potassium and magnesium in higher plants

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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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

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