Involvement of Plasma Membrane H+-ATPase in Adaption of Rice to Ammonium Nutrient

(整期优先)网络出版时间:2011-04-14
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ThepreferenceofpaddyriceforNH4+ratherthanNO3ˉisassociatedwithitstolerancetolowpHsincearhizosphereacidificationoccursduringNH4+absorption.However,theadaptationofriceroottolowpHhasnotbeenfullyelucidated.TheplasmamembraneH+-ATPaseisauniversalelectronicH+pump,whichusesATPasenergysourcetopumpH+acrosstheplasmamembranesintotheapoplast.ThekeyfunctionofthisenzymeistokeeppHhomeostasisofplantcellsandgenerateaH+electrochemicalgradient,there...