). Pigment development in some senescing flowers is similar to that in ripening fruits. An increase in both anthocyanin and ß-carotene production was noted in aging Lantana camara flowers (MOH84656). Ethephon was also shown to increase anthocyanin formation in peppermint leaves (ELK86285). Studies with enzymes of the shikimic acid pathway suggest that ethylene regulates anthocyanin formation by increasing the formation of phenylalanine ammonia-lyase (PAL). An increase in PAL was associated with the increase in anthocyanin formation in apples (BLA88001, FAR84089). Reddening of strawberries was accompanied by the induction of PAL and uridine diphosphate glucose :flavonoid 3-O-glucosyltransferase. L-a-Aminooxy-ß-phenylpropionic acid (an inhibitor of PAL) inhibited anthocyanin synthesis in ripening strawberry fruit (GIV88025).
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