Abstract
Cuticular membranes (ca. 0.04 mg/cm2) were isolated from fresh and flue-cured tobacco leaves (Nicotiana tabacum) as clear, colorless and thin films by oxalic ammoniumtreatment and successive cellulase-pectinase digestion. GC-MS analyses, after hydrogenolysis and trimethylsilylation, revealed that the membranes are mainly built up of 10, 16-dihydroxy hexadecanoic acid in a polyester network structure which survives postharvest-treatments. The fruit skins of solanaceaes; sweet pepper (Capsicum annuum), eggplant (Solarium melongena) and tomato (Solarium lycopersicum), have similar membranes which are essentially composed of 9, 16- and 10, 16-dihydroxy hexadecanoic acid.
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