Genome-Wide Analysis of Ca²⁺-ATPases and their Salt Stress Responses in Sugar Beet

Salt stress inhibits seed germination, plant growth, development and productivity. Ca²⁺-ATPases play a key role in plant response to environmental stresses. Sugar beet is an important cash crop and one of the main sugar crops in China. However, there are few reports on the study of Ca²⁺-ATPase gene family in sugar beet. In this study, we analyzed the sugar beet Ca²⁺-ATPase gene family and the functions of genes in response to salt stress. A total of 21 Ca²⁺-ATPase genes were identified in the genome. Their physical and chemical properties, chromosome localization, and subcellular localization were predicted by bioinformatics analysis. Additionally, their phylogenetic relationships, structural characteristics, cis-acting elements, and expression patterns in different tissues of sugar beet under salt stress were analyzed. Protein interaction networking indicates that Ca²⁺-ATPase may play a role in flavonoid biosynthesis and ABA signal transduction. The results help to advance our understanding of the Ca²⁺-ATPase gene family, providing a scientific base for elucidating the functions of Ca²⁺-ATPase genes in plant stress responses.