Abstract
Abstract The interaction of the gibberellins GA3 and GA4+7 with SADH on growth and sex expression was tested on andromonoecious muskmelon (Cucumis melo L. cv. Ananas PMR). SADH effectively reduced internode length and increased female tendency of plants. GA4+7 had an opposite effect on both growth and sex expression. GA3 was much less effective in both respects. The growth regulators were mutually antagonistic when plants were treated with both GA and SADH. The endogenous level of gibberellin decreased in SADH-treated plants 2 and 7 days after treatment. Gibberellin content reached the level of untreated plants 2 weeks after treatment, some time before the growth retarding effect of SADH treatment disappeared. These results indicate that the effect of its effect on the endogenous levels of gibberellin.
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