Abstract
The specific inhibitor of gibberellin biosynthesis, (2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)pentan-3-ol (paclobutrazol), inhibited germination ofAmaranthus caudatus L. seeds. Addition of gibberellic acid (GA3), 2-chloroethylphosphonic acid (ethephon), or 1-aminocyclopropane-1-carboxylic acid (ACC) effectively antagonized inhibition. Ethephon was found to be the most efficient antagonist. The transfer of seeds after 1 day's incubation in paclobutrazol to solutions of GA3 or ethephon reversed the inhibition, the effect increasing with increasing concentration of GA3 or ethephon. Seeds incubated in paclobutrazol for 5 days decreased sensitivity to GA3 and ethephon.
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Kepczyński, J., Kepczyńska, E. & Knypl, J.S. Effects of gibberellic acid, ethephon, and 1-aminocyclopropane-1-carboxylic acid on germination ofAmaranthus caudatus seeds inhibited by paclobutrazol. J Plant Growth Regul 7, 59–66 (1988). https://doi.org/10.1007/BF02054162
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DOI: https://doi.org/10.1007/BF02054162