Lunau, Klaus (1996) Unidirectionality of floral colour changes. PLANT SYSTEMATICS AND EVOLUTION, 200 (1-2). pp. 125-140. ISSN 0378-2697, 2199-6881
Full text not available from this repository.Abstract
Many angiosperms have arranged their flowers in inflorescences forming a distinct signalling unit to flower visitors. In some species, the flowers of inflorescences undergo a temporal colour change corresponding exactly to a change in the reward status. Based on information obtained from the spectral reflection curves of pre-change and post-chage colours of flower corollas and/or floral guides, it was possible to demonstrate that the colour phase associated with reward closely corresponds to the visual stimuli which trigger behavioural responses of inexperienced flower visitors, and that the colour phase associated with less reward corresponds to visual stimuli less attractive to naive flower visitors. Reciprocal colour changes were not observed. It is to be assumed that the unidirectionality of floral colour changes is an adaptation of angiosperms aimed at the guidance of first-time flower visitors. Signalling reward to inexperienced flower visitors is an additional function of floral colour changes. The main function of floral colour changes, however, is to provide cues with which the flower visitors can learn to associate one colour phase with reward.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INSECT POLLINATORS; FLOWER COLORS; VISION; SIGNALS; CUES; LEPIDOPTERA; HONEYBEE; PATTERNS; PLANTS; BEES; angiosperms; colour change, floral colour phase, innate flower detection, colour preference, pollination |
| Subjects: | 500 Science > 580 Botanical sciences 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Nov 2023 08:51 |
| Last Modified: | 15 Nov 2023 08:51 |
| URI: | https://pred.uni-regensburg.de/id/eprint/52120 |
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