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Effect of diurnal sampling on the headspace composition of detached Nicotiana suaveolens flowers


Phytochemistry (Oxford) 32(6): 1417-1419
Effect of diurnal sampling on the headspace composition of detached Nicotiana suaveolens flowers
Compounds emitted over a 24 hour sampling period by detached flowers of Nicotiana suaveolens were examined after collecting flowers at 12:00 and 24:00 hours (dark period 24:00-08:00 hours), entraining volatiles in air and trapping on Tenax. The yields were approximately 640 ng g-1 and 31,000 ng g-1 at 12:00 and 24:00 hours, respectively, and these differences were due largely to benzoic acid derivatives. This pattern of higher emission at ca 24:00 hours was consistent with the rhythms seen in an earlier study for in situ flowers. Several new compounds including phenylpropanoid-derivatives and sesquiterpene hydrocarbons were identified in the headspace of flowers collected at 24:00 hours. A number of these phenylpropanoid-derived headspace components (e.g. E-cinnamyl aldehyde, benzyl salicylate), had been found previously in glycosidically-bound forms.

Accession: 002355200

DOI: 10.1016/0031-9422(93)85149-l

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