PP1 — Triticum turgidum subsp. durum

Summary

TRITD6AV1G221500 (symbol PP1, also known as TtPP1) on durum wheat chromosome 6A encodes a protein serine/threonine phosphatase catalytic subunit belonging to the PP1 family. The gene product exhibits protein serine/threonine phosphatase activity, phosphatase inhibitor activity, and auxin efflux transmembrane transporter activity, among other molecular functions. It is associated with diverse biological processes including auxin export, leaf and cotyledon morphogenesis, trichome and root hair differentiation, gibberellic acid homeostasis, and responses to abscisic acid, chitin, and red light. The protein localizes to the protein phosphatase type 1 complex, plasma membrane, vacuole, nucleolus, and plasmodesmata. The gene has been linked to numerous agronomic traits such as leaf morphology, root epidermal cell length, adventitious root number, seed set percent, bacterial blight disease resistance, temperature stress response, plant male sterility, and aluminum response. Studies of related genes in other species connect the family to ABA signaling, polar auxin transport, root meristem growth, phototropism, leaf morphogenesis, and disease resistance.