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The increasing world population makes high yield crop production a necessity in future agriculture. However, the negative effects of the emission of greenhouse gases into Earth’s atmosphere and the resulting climate change may impede reaching this goal. New stresses will appear and the existing ones will be exacerbated. Important plant processes such as the acquisition of K⁺, which is an essential macronutrient for plants, will be negatively affected. The development of new crop varieties with enhanced capacities in the acquisition of K⁺, especially under the future environmental conditions, is an important challenge. One of the first steps may be the identification of the K⁺ uptake systems operating in the roots, which may be later improved to enhance K⁺ acquisition under stress conditions. Some gene families encoding K⁺ transporters, that is, the HAK1-type, and channels, that is, the AKT1-type, key pieces …