ABI1 — Brassica oleracea

Summary

BoABI1 (BOLC102_C06P030560.1) on cabbage chromosome 6 encodes a protein with a PPM-type phosphatase-like domain and is annotated with multiple molecular functions including abscisic acid binding, protein phosphatase regulator activity, and sucrose-phosphate synthase activity. The gene is associated with diverse biological processes such as nectar secretion, regulation of actin polymerization, chlorophyll breakdown, and response to flooding. It has been linked to numerous agronomically relevant traits including biomass yield, seed viability, water use efficiency, stem diameter, leaf elongation rate, and yield. Associations also extend to petal length, root system morphology, nitrogen sensitivity, and resistance to powdery mildew. The gene is connected to the Arp2/3 protein complex, SCAR complex, and SWI-SNF complex, and is linked to phenotypes including impaired ABA-activated stomatal closure, altered cell expansion, and pavement cell morphology. Related genes in other species link the family to ABA-mediated stomatal closure, heat tolerance, and lateral root development.