Effects of Ethephon on Terpenoids in Cannabis sativa L. in Vegetative Stage
2016
Mansouri, Hakimeh | Salari, Fatemeh | Asrar, Zahra | Nasibi, Fatemeh
In the present study we investigated the effect of ethephon on changes in the amount of many terpenoid compounds including, tetrahydrocannabinol (THC), cannabidiol (CBD), chlorophyll, carotenoids, α-tocopherol and pyruvate as one of substrate in plastidic terpenoids biosynthesis in Cannabis sativa at vegetative stage. Treatment with 1 and 100 µM ethephon increased THC content up to 9 fold in vegetative stage. Plants treated with 10 µM ethephon had more CBD content in comparison with control plants. The amount of CBD decreased in plants subjected to 5 and 100 µM ethephon. Leave area in plant treated with ethephon did not show significant changes in comparison to control plants. Ethephon treatment caused a declined in the amount of α-tocopherol. The levels of chlorophylls and carotenoids raised in treated plants with 1 µM ethephon. With regard to the fact that ethephon had not negative effect on the surface of leaves and chlorophyll content thus its application can be a suitable way for increasing of THC and α-tocopherol in Cannabis sativa L.
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