Influence of rootstocks on the accumulation of chloride, sodium and potassium in grapevines

Abstract

The seasonal course of chloride, sodium and potassium accumulation in leaves and berries of Shiraz, Cabernet Sauvignon, Sultana and Muscat Gordo Blanco scions was studied in relation to rootstock effects (own roots v. Salt Creek, Harmony and Schwarzmann rootstocks). Vines on rootstocks generally contained less chloride, but more potassium, in petioles and berries than did own-rooted vines. The extent of the effect, however, was dependent upon scion variety. Cabernet Sauvignon differed from the other scions in that vines on Harmony stock accumulated more sodium than did own-rooted vines. High levels of chloride, sodium and potassium were retained by petioles and laminae at abscission. Some possible consequences of rootstock-induced changes in the ionic composition of leaves and berries are discussed.