In this article:
Rooted cuttings of Vitis vinifera cv. Cabernet Sauvignon were grown in nutrient culture solutions.
When Cycocel [(2-chloroethyl)trimethylammonium chloride] was added to the nutrient solutions, plants retained 40% of their berries. Plants from which the shoot tip was removed at anthesis, either with or without Cycocel treatment showed similar fruit set.
Control plants retained only 20% of their berries. Percentage fruit set was inversely related to the rate of shoot elongation during the week following anthesis.
The results suggest that treatment with Cycocel and tipping increase fruit set by reducing competition between the developing leaves and ovaries for available metabolites.
A Comparison of the Effect of “Cycocel” and Tipping on Fruit Set in Vitis vinifera L.
1969, Australian Journal of Biological Sciences, vol 22, pages 1305 – 1311
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