HAB1 (AT1G72770) — Arabidopsis thaliana

Summary

AT1G72770 (HAB1) in Arabidopsis thaliana encodes a protein-serine/threonine phosphatase of the PP2C family. The gene is associated with abscisic acid (ABA) mediated signaling, response to drought and flooding, and regulation of cell shape and cytoskeleton organization. It has been linked to numerous traits including leaf water potential, turgor pressure, root system morphology, petal length, specific leaf area, biomass yield, and responses to water stress, light quality, and various ion sensitivities. The encoded protein localizes to the cell periphery, protein serine/threonine phosphatase complex, and secondary cell wall, and is connected to processes such as membrane hyperpolarization, nectar secretion, and glucose-mediated signaling. Studies of related genes in other species link the family to drought recovery, ABA hypersensitivity, and susceptibility to pathogens including Botrytis cinerea and Pseudomonas syringae.