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Marigold (Calendula officinalis L.) is an annual aromatic herb belongs to the Asteraceae family. In order to study the effects of of gibberellic acid and ethanol on flower yield and phenolic compositions marigold, an experiment was conducted at Agriculture Research Center & Natural Resources of Hamedan Province in 2013. The first factor consisted gibberellic acid in 4 levels (0, 250, 500, 750 ppm) and the second factor consisted of ethanol in 3 levels (0, 3, 15%) in factorial based on randomized complete block design with three replications. The obtained results from this study on the number of flowers in bush indicate significant effect of gibberellic acid, ethanol and their interaction effects in 1% probability level, also number of flowers in surface unit and function of wet flower in the surface unit was significant effect of gibberellic acid, ethanol and their interaction effects in 1% level, but function of wet flower in bush and function of wet flower in bush and phenolic compositions was significant in 5% probability level. gibberelic acid causes to increase the active substance. Comparison of mean interaction effects for gibberelin and ethanol indicated that the level of gibberelin 500 ppm and 30% ethanol had the highest amount of phenolic compositions with the average of 0.92 and the level of gibberelin 500 ppm and 30 % ethanol, and the level of gibberelin 500 ppm and witness ethanol had the least amount of phenolic compositions with the average of 0.55.
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Author(s): Hamidreza Ardalani Amin Hadipanah Seyyed Mojtaba Pourrezvani
Gibberellic acid, Ethanol, Callendula Officinalis, Chlorophyll, Carotenoid.