Sex Expression and Level of Phytohormones in Monoecious Cucumber as Affected by Plant Growth Regulators
نویسندگان
چکیده
The hormone levels of auxin and gibberellin were studied in monoecious cucumber plants treated with growth regulators e.g. 2-chloroethylphosphonic acid (ethrel), gibberellic acid (GA3) and maleic hydrazide (MH). The studies were conducted at Vegetable Crops Research Programme, National Agricultural Research Centre Islamabad, Pakistan during 2003 and 2004. The greatest increase in female flower production, lowest ♂ to ♀ sex ratio, highest number of fruits/plant and yield were recorded with the application of MH at 450 μM/l as compared to control. Ethrel also significantly lowered the ♂ to ♀ sex ratio in cucumber. The treated plants had an increased level of auxin hormone. Hormone GA level had a positive correlation with the number of pistillate flower/plant, fruit set percentage and IAA level had a negative correlation with sex ratio.
منابع مشابه
A GAMYB homologue CsGAMYB1 regulates sex expression of cucumber via an ethylene-independent pathway
Cucumber (Cucumis sativus L.) is a typical monoecious vegetable with individual male and female flowers, and has been used as a model plant for sex determination. It is well known that sex differentiation of cucumber can be regulated by phytohormones, such as gibberellic acid (GA) and ethylene. The molecular mechanism of female sex expression modulated by ethylene has been widely understood, bu...
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