P44 — Arabidopsis thaliana

Summary

AT4G33950, also known as OST1, SNRK2.6, or P44, encodes a non-specific serine/threonine protein kinase in Arabidopsis thaliana. The gene is associated with stomatal responses, particularly ABA responsiveness in stomata, and has been linked to xylem fiber cell death, fatty acid desaturation, sucrose synthesis, oil synthesis, and cuticle formation. OST1 is associated with biological processes including regulation of mRNA metabolism, membrane hyperpolarization, halotropism, galactolipid metabolism, and detection of mechanical stimuli. It is also associated with traits such as drought recovery, water stress response, leaf water potential, turgor pressure, root branching, vegetative vigor, and phosphorus concentration. Studies in other species link the gene family to defense responses, iron deficiency tolerance, and tuber induction.