Prominent Promotion on the Fruit Growth in Cucumis sativus L. by Gibberellin A₄₊₇ and Benzyladenine

Abstract

The aqueous solution of GA₃, GA₄₊₇, BA or IAA was applied by spraying the ovary of an opening flower on the main stem of cucumber, Cucumis sativus L. cv. Chozitsuochiai No. 2, which was grown in the greenhouse in autumn and winter. GA₄₊₇ and BA were found to be highly active in promoting the fruit setting and development. GA₃ was less active and IAA was not active. The fresh fruit treated with GA₃, GA₄₊₇ or BA at 100ppm was three, ten and five times greater in weight than the control, respectively. The promotion of GA₄₊₇ or BA on fruit growth was obtained by treatment of the ovary at different stages of flower development.