Some characteristics of terpenoid biosynthesis by leucoplasts of Citrofortunella mitis.
The capacity of leucoplasts to synthesize monoterpene hydrocarbons has been further investigated by studying the synthesis of higher-terpene homologues. Isolated leucoplasts were unable to esterify chlorophyllides into chlorophylls and to synthesize carotenoids. In addition, the later steps of α-tocopherol and phylloquinone synthesis were not performed. In spite of the presence of a prenyltransferase activity leading to the synthesis of alcohol terpenes higher than gerniol (farnesol, geranyl-geraniol), these higher terpenes were not further metabolized in vitro by leucoplasts.
Laboratoire de Physiologie cellulaire végétale, C.N.R.S. (U.A. 568), Université de Bordeaux 1, Avenue des Facultés, F-33405, Talence Cedex, France.
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M
Gleizes
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Camara
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Walter