Cytokinins in the xylem sap of grape vine canes: Changes in activity during cold-storage.
Xylem sap extracted under suction from dormant grape vine canes (one-year-old woody stems) had only slight cytokinin activity compared with sap from growing canes when tested on soybean callus. Highest activity was detected in sap from canes harvested whilst dormant and subsequently stored for six months in sealed plastic bags at 1°. The significance of the findings is discussed.
Division of Horticultural Research, C.S.I.R.O., Adelaide, South Australia.
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