TY - JOUR T1 - Effects of Water Relations on the Potassium Status of Shiraz Vines JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 40 LP - 45 DO - 10.5344/ajev.1984.35.1.40 VL - 35 IS - 1 AU - Chris G. Dundon AU - Richard E. Smart Y1 - 1984/01/01 UR - http://www.ajevonline.org/content/35/1/40.abstract N2 - Diurnal cycles of leaf and cluster water potential and K+ concentrations of xylem exudates and berry juice were investigated on K fertilized and control Shiraz vines in a cool, dryland vineyard (Eden Valley) and a hot, irrigated vineyard (Waikerie). Fertilized vines exhibited more severe water stress, and the berry juice K+ contents varied diurnally as a linear function of water stress. Regional and maturity effects on diurnal patterns of K+ content of exudates and juice were observed. Potassium fertilizing of vines did not significantly affect the K+ concentration of leaf or cluster xylem exudates or berry juice. ER -