Circadian rhythmicity of fragrance emission in flowers of Hoya carnosa R. Br.
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In flowers of Hoya carnosa R. Br. the nocturnal emission of fragrance occurs according to an endogenous circadian rhythmicity. This was demonstrated by the continuation of rhythmical emission for two to three cycles under conditions of permanent illumination. The free-running period was approx. 29 h under these conditions. The inversion of light/dark cycles caused the entrainment of the next peak of emission by approx. 12 h whether the inversion was started with a light period or a with dark period prolonged for 12 h. When only the flower used for fragrance analysis was subjected to an inverted photoperiod, the rest of the plant remaining under the original light/dark cycle, the synchronization of fragrance emission occurred according to the Zeitgeber perceived by the individual flower.
Key wordsCircadian rhythmicity Flower fragrance Hoya Volatiles
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- Bünning, E. (1956) Endogenous rhythms in plants. Annu. Rev. Plant Physiol. 7, 71–90Google Scholar
- Bünning, E. (1967) The physiological clock. Springer, New YorkGoogle Scholar
- Hess, D. (1983) Die Blüte. Ulmer, StuttgartGoogle Scholar
- Jones, M.B., Mansfield, T.A. (1975) Circadian rhythms in plants. Sci. Prog. London 62, 103–125Google Scholar
- Mägdefrau, K. (1973) Geschichte der Botanik. Leben und Leistung großer Forscher. Fischer. StuttgartGoogle Scholar
- Matile, Ph., Altenburger, R. (1988) Rhythms of fragrance emission in flowers. Planta 174, 242–247Google Scholar
- Overland, L. (1960) Endogenous rhythm in opening and odor of flowers of Cestrum nocturnum. Am. J. Bot. 47, 378–382Google Scholar
- Rensing, L. (1973) Biologische Rhythmen und Regulation. Fischer, StuttgartGoogle Scholar
- Sweeney, B.M. (1969) Rhythmic phenomena in plants. Academic Press, London New YorkGoogle Scholar