APD5 — Zea mays

Summary

ZM00001EB003010 (ZmAPD5, also known as ZmPP17) on maize chromosome 1 encodes a protein phosphatase 2C (PP2C) family member with protein serine/threonine phosphatase activity, pyruvate dehydrogenase phosphatase activity, and proton-transporting ATPase activity. The gene is associated with regulation of signaling, negative regulation of leaf senescence, homeostasis of meristem cell number, response to water and potassium ions, auxin polar transport, autophagy, and activation of cellular response to heat stress. It has been linked to traits including grain size, leaf angle, root number and length, tiller number, water use efficiency, transpiration rate, stomatal resistance, cadmium concentration, alkali soil sensitivity, and vegetative growth time. The product localizes to the plasma membrane, cytoplasm, Golgi, mitochondria, and plasmodesmata. Studies of related genes in other species connect the family to heat stress memory, salt tolerance, and hydrotropism.