Abstract
Summary Effects of GA3 (gibberellic acid) on growth of and cardenolide accumulation in Digitalis lanata tissue cultures are reported. Two cardenolide-producing strains were compared. Strain S-1, which accumulated cardenolides predominantly in light, showed increased growth but decreased cardenolide content after cultivation with GA3 in the medium. Strain S-2, in darkness, showed an increase in both growth and cardenolide accumulation after GA3 addition. With 1 μM GA3 the cardenolide yield was more than 400 % of that of the control.
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