, Volume 174, Issue 2, pp 248–252 | Cite as

Circadian rhythmicity of fragrance emission in flowers of Hoya carnosa R. Br.

  • Rolf Altenburger
  • Philippe Matile


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 words

Circadian rhythmicity Flower fragrance Hoya Volatiles 


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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • Rolf Altenburger
    • 1
  • Philippe Matile
    • 1
  1. 1.Institut für Pflanzenbiologie der UniversitätZürichSwitzerland

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