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黄瓜(Cucumis sativus L.)及瓠瓜(Lagenaria leucantha Rusby)幼苗期间,用乙烯利(150ppm)喷洒处理,可以明显地增加雌花的发生,减少雄花的发生;而用赤霉素处理可以增加雄花的发生,而减少雌花的发生。 瓠瓜的主蔓很少着生雌花,而只生雄花。经乙烯利处理后,可以连续十余节都着生雌花,因而从根本上改变了瓠瓜的开花习性。但对于侧蔓上的雌雄性别的影响很少。 乙烯利处理,可以大大增加黄瓜及瓠瓜的雌花数,但对于产量的影响,因品种特性,及栽培技术而不同。其中以早期产量增加较明显,而总产量不一定增加。 当乙烯利与赤霉素混合处理时,对性别表现的效果,要看赤霉素的浓度来决定。高浓度(1500ppm)的赤霉素可以抵消乙烯利对性别表现的作用,低浓度(50ppm),不能抵消乙烯利的这种作用。 乙烯利促进黄瓜多生雌花的效果有一定的持续时期。在处理后8,12,24小时后,再喷高浓度赤霉素会增加雄花数及降低雌花数,但48小时以后则几乎没有什么作用。 黄瓜幼苗经乙烯利处理后,会增加其茎端组织的过氧化物酶的活性;而赤霉素处理,会抑制过氧化物酶的活性。
During the seedlings of cucumber (Cucumis sativus L.) and Lagenaria leucantha Rusby, sprayed with ethephon (150 ppm) significantly increased the occurrence of female flowers and decreased the incidence of male flowers; while the treatment with gibberellin increased the content of male flowers Occurs, while reducing the incidence of female flowers. Gorgon melon little spread of female flowers, but only male flowers. After ethephon treatment, you can continue to spend more than ten knot female flowers, which fundamentally changed the flowering habits of cucumber. However, there is little impact on male and female on the side. Ethephon treatment can greatly increase the number of female cucumber and cucumber flowers, but the impact on yield, due to variety characteristics, and cultivation techniques and different. Among them, the increase of early production is more obvious, but the total output may not increase. When ethephon and gibberellin mixed treatment, the effect of gender performance, gibberellin to determine the concentration. High concentration (1500ppm) of gibberellin can counteract the effects of ethephon on the performance of sex, low concentration (50ppm), can not offset ethephon this effect. Ethephon to promote the effect of cucumber polygamy female have a certain duration. At 8, 12, and 24 hours after treatment, spraying high concentrations of gibberellin increased the number of male flowers and decreased the number of female flowers, but little effect was observed after 48 hours. Cucumber seedlings treated with ethephon increased the activity of peroxidase at the shoot tip of the cucumber, while GA treatment inhibited the activity of peroxidase.