are all reflected in the levels of accumulated hydroxycinnamic
acids. Fresh potato tissue, devoid of PAL or chlorogenic acid, develops both on
incubation in light.2 Both PAL and chlorogenic acid production are inhibited by cycloheximide.
Similar increases in PAL and chlorogenic acid have been described in ethylenetreated
sweet potatogg and Swede tissues.80 In the Actinomycete Streptomyces verticillatus,
there is a correlation between cinnamide production and the levels of PAL.17