Effect of plant extracts and growth regulators on endogenous hormones and carbohydrate of snak cucumber (Cucumis melo var.Flexueses Naud) and cucumber (Cucumis sativus L.)


Two experiments were conducted during the growing seasons of 2002 and 2003 to find out the effect of garlic extract at (1: 0.5) and (1:1) (wt:volume) concentration and Liqurous extract at 1.25 and 2.50 mg/ L and growth regulator IAA at 25 ,50 and 75 mg/ L and ethephon at 100,200,300 mg/ L on endogenous hormones (auxins and gibberellins) and carbohydrates at three growth stage of snak cucumber and cucumber which were ; third to fourth true leaf stage, male flower appearance stage and female appearance stage . Random1zed complete block design was used with three replications for both experiments. Results showed a decrease in gibberellins and increase in auxins contents in both plants by the treatments of IAA (75 mg/L) and ethephon at (200,300 mg/L). Gibberellins contents decreased significantly by Liqurous at 2.50 gm/L for both plants in the second season only whereas, auxins contents increased by treatment of garlic (1:1) and Liqurous (2.5 gm/L) in cucumber for both seasons. Carbohydrates contents decreased at IAA (25 and 50 mg/L) for both season and increased in second season by ethephon in snake cucumber and by IAA (75mg/L) in the first season in cucumber. Male flowers appearance stage gave highest gibberellins contents compare to other stages. Female flowers appearance stage gave highest auxins and carbohydrates contents compare to other stages. Ethephon at 300mg/L treatment at female flower appearance stage gave the lowest gibberellins and highest auxins and carbohydrates for both plant and seasons.