KCNA3 and potassium deficiency: Accordingly, we found candidate genes related to potassium deficiency in A. thaliana. It is the GC5 gene, which encodes a protein that functions as a structural component of the Golgi apparatus in diploids (Kang et al. 2004), while in tetraploids selection acted on KAT3 gene, encoding potassium channel subunits, and on the KUP9 potassium ion transmembrane transporter (Hedrich 2012; Šustr et al. 2024).