ABI2 — Brassica oleracea var. botrytis

Summary

BoABI2 (ABI2) on cauliflower chromosome 9 encodes a protein with a PP2C domain and PPM-type phosphatase-like domain, annotated with abscisic acid binding, protein phosphatase regulator activity, and phase separation nucleator activity. It is associated with regulation of actin polymerization, cell wall cellulose biosynthesis, petal morphogenesis, and responses to drought, flooding, and carbon dioxide. The gene is linked to numerous agronomic traits including yield, seed yield, biomass, water use efficiency, stomatal resistance, leaf elongation rate, root system morphology, submergence tolerance, and sensitivities to nitrogen, potassium, magnesium, and aluminum. It is also associated with ABA signaling, stomatal closure, photosynthetic efficiency, and cold tolerance. Related genes in other species are linked to ABA-mediated stomatal closure, heat tolerance, and root hair development.