Cell-Type-Speci fi c H +-ATPase Activity in Root Tissues Enables K + Retention and Mediates Acclimation of Barley ( Hordeum vulgare ) to Salinity Stress 1 [ OPEN ]

School of Land and Food, University of Tasmania, Hobart, Tasmania 7001, Australia (L.S., J.Z., I.P., J.B., Mi.Z., H.W., Me.Z., S.S.); Centro Universitario de Investigaciones Biomédicas, Universidad de Colima, Colima 28045, Mexico (I.P., A.V.-B.); Australian Research Council Centre of Excellence in Plant Energy Biology and School of Agriculture, Food, and Wine, University of Adelaide, Glen Osmond, South Australia 5064, Australia (J.B.); Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen DK-1871, Denmark (A.T.F.); Fisiología Vegetal, Facultad de Biociencias, Universidad Autónoma de Barcelona, Bellaterra 08193, Spain (A.M., C.Po.); School of BioSciences (C.B.H., U.R.) and Australian Research Council Centre of Excellence in Plant Cell Walls, School of BioSciences (A.B.), University of Melbourne, Victoria 3010, Australia; and Department of Horticulture, University of Florence, Florence 50019, Italy (E.A., C.Pa., S.M.)