HMA1 — Beta vulgaris subsp. vulgaris

Summary

BvHMA1 (BVRB_9G215000) on sugar beet chromosome 9 encodes a P-type ATPase with copper, zinc, and cadmium transporter activities, as well as histone methylase activity. This gene is associated with detoxification of zinc, copper, and cadmium ions, metal ion transport, and proton export across the plasma membrane. It has been linked to responses to cobalt, toxic substances, and oxidative stress, along with regulation of root morphogenesis, leaf senescence, flowering time, and stomatal opening. Associations also include copper sensitivity, drought tolerance, disease tolerance, nitrate uptake, and germination rate. The encoded protein localizes to the vacuolar membrane, chloroplast thylakoid membrane, and chromatin. Studies of related genes in other species connect the family to copper transport, zinc detoxification, cadmium translocation, and photosensitivity under high light.