Abstract
Padrón pepper plants ( Capsicum annuum L. var. annuum) were grown using three different water supplies to determine the effect of water on several biological parameters of phenylpropanoid metabolism. The soluble phenolics and lignin contents of Padrón pepper fruits from control plants were higher than those of water-stressed plants. The amount of capsaicinoids (capsaicin and dihydrocapsaicin) in Padrón pepper fruits of water-stressed plants, was higher than that in control plants, especially with low water treatment. The results of these experiments suggest that environmental conditions, such as water stress, have a strong effect upon the accumulation of capsaicinoids in Padrón pepper fruits, which is the result of competition between biosynthesis of capsaicinoids and other phenylpropanoid metabolites.
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