HA1 — Solanum lycopersicum

Summary

SlHA1 (SOLYC03G113400.4) on tomato chromosome 3 encodes a P-type ATPase, specifically a member of the IIIA subfamily, with proton-transporting ATPase activity and additional annotated molecular functions including cation-transporting ATPase, guanylyl cyclase, and calmodulin-binding activities. The gene is associated with proton export across the plasma membrane, membrane hyperpolarization, vacuolar acidification, and oxalate secretion. It has been linked to numerous agronomic traits including sodium and iron content, seedling height, root volume and dry weight, leaf water potential and relative water content, water stress response, carotene and lycopene content, bacterial disease response, phosphorus uptake, and shoot growth angle. Associations also include root hair formation and density, pollen tube growth, stomatal movement and closure, pathogen defense, drought response, salt resistance, and plant fertility. Studies of related genes in other species link the family to root hair elongation, hydrotropism, and anther development.