Influence of temperature on the rhythmic emission of volatiles from Ribes nigrum flowers in situ |
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| Authors: | L HANSTED H B JAKOBSEN C E OLSEN |
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| Institution: | Department of Agricultural Sciences Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark.;Department of Plant Biology, Plant Physiology and Anatomy Laboratory Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark.;Chemistry Department, The Royal Veterinary and Agricultural University, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark. |
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| Abstract: | The floral volatiles of blackcurrant (Ribes nigrum) were collected in situ using the headspace technique. Eleven compounds were identified, including monoterpenes hydrocarbons and monoterpene ethers. The fragrance was emitted in a rhythmic manner, the maximum being in the middle of the photoperiod. Emission at 20°C was significantly higher than at 10°C. The rhythmic nature of emission seemed to cease under conditions of constant light. However, a slight rise in emission during the second period in continuous light may indicate a circadian control of emission. The significance of flower volatiles in relation to pollination is discussed. |
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| Keywords: | Ribes nigrum Ribesiaceae blackcurrant flower fragrance volatiles rhythmicity temperature monoterpenes |
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