Abstract
Although quinones are derived from a variety of different precursors (for reviews see Leistner 1981, 1984), they belong to those secondary plant products that are produced in cell cultures in rather large amounts. Thus acetate derived anthraquinones occur in tissue cultures of Cassia (Tabata et al. 1975; Takahashi et al. 1978;Noguchi and San-kawa 1982) and Rheum (Furuya et al. 1975; Rai 1978). Selection of strains yielded a Nicotiana tabacum cell culture which produced rather large amounts of ubiquinone-10 (Matsumoto et al. 1980). This quinone is derived from phenylpropanoids and mevalonic acid, as are the naphthoquinones alkannin and shikonin occurring in Echium (Fukui et al. 1983) and Lithospermum (Fukui et al. 1984) cell suspension and callus cultures. The present review concentrates on quinones derived from chorismate1 via o-succinyl-benzoic acid.
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