Effect of Gibberellic Acid and Chlormequat Chloride on Growth, Coumarin Content and Root Yield of Angelica dahurica var. Formosana

The effects of the plant growth promoter gibberellic acid (GA۳) and plant growth retardant chlormequat chloride (CCC) on biomass and quality of Angelica dahurica var.formosana plants were investigated employing physiological and biochemical methods. Plants were sprayed with GA۳ or CCC at rosette stage and coumarin content was analyzed by high performance liquid chromatography (HPLC) after harvest. Two coumarins in root were detected: isoimperatorin and imperatorin. The root content of imperatorin was not affected by application either GA۳ or CCC, while isoimperatorin was increased to ۱۲۷% after treatment with CCC (۴۰۰ mg L-۱). The lowest concentrations of GA۳ (۵۰ mg L-۱) and CCC (۴۰۰ mg L-۱) increased root yield to ۱۵۷ and ۱۳۹%, respectively. We note here that GA۳ and CCC might be used in improving the yield of A. dahurica var. formosanaandmaintaining the coumarin content.

Keywords:

Angelica dahurica var. formosana , Plant growth promoter , Biomass , Coumarin content