Fragrance chemotypes of Platanthera (Orchidaceae) - the result of adaptation to pollinating moths?

Autor:	L.Gunnar Bergström, Lars Tollsten
Rok vydání:	1993
Předmět:	Orchidaceae Pollination Chemotype Pollinator Botany Introgression Plant Science Platanthera chlorantha Platanthera bifolia Biology biology.organism_classification Ecology Evolution Behavior and Systematics Platanthera
Zdroj:	Nordic Journal of Botany. 13:607-613
ISSN:	1756-1051 0107-055X
Popis:	Floral scent of Platanthera species (Orchidaceae) in S Sweden was collected by head-space adsorption methods in the field and analysed by gas chromatography-mass spectrometry (GC-MS). Variation in scent chemistry of both Platanthera bifolia and P. chlorantha was considerable: different scent chemotypes were found among individuals as well as populations. Mainly linalool, lilac aldehydes and alcohols, geraniol, and methyl benzoate distinguished the chemotypes. Because of a high individual variation, floral scent in Platanthera is not suitable as a taxonomic tool. Scent variation can be the result of differential selection from various pollinators or pollinator groups. However, in a long-spurred race of P. bifolia the scent profile was not clearly different from that of short-spurred races in spite of their different pollinators. The two species form natural hybrids and part of the variation at the individual level may he explained by interspecific introgression. Differences found among populations in different regions may be the result of random genetic drift.
Databáze:	OpenAIRE
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