“…A large number of bioregulators of carotenoid biosynthesis have been developed (Hsu et al, 1975;Poling et al, 1976) and shown to have a profound effect on carotenogenesis in a number of organisms Fruit and Vegetable Chemistry Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Pasadena, California 91106. (Coggins et al, 1970;; ; Gertman and Fuchs, 1973;Elahi et al, 1975;Jahn and Young, 1975; Hayman and Yokoyama, 1976). These compounds cause accumulation of the acyclic carotene, lycopene, and induce increased carotenogenesis.…”