Floral scent chemistry within the genus Linnaea (Caprifoliaceae)

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http://hdl.handle.net/10138/326306

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Bergstrom , L G W , Bergquist , S , Stenhagen , G , Gahmberg , C G , Maia , A C D & Nordenstam , B 2018 , ' Floral scent chemistry within the genus Linnaea (Caprifoliaceae) ' , Nordic Journal of Botany , vol. 36 , no. 3 , 01732 . https://doi.org/10.1111/njb.01732

Title: Floral scent chemistry within the genus Linnaea (Caprifoliaceae)
Author: Bergstrom, L. Gunnar W.; Bergquist, Sara; Stenhagen, Gunnar; Gahmberg, Carl G.; Maia, Artur Campos D.; Nordenstam, Bertil
Contributor: University of Helsinki, Biosciences
Date: 2018-03
Language: eng
Number of pages: 9
Belongs to series: Nordic Journal of Botany
ISSN: 0107-055X
URI: http://hdl.handle.net/10138/326306
Abstract: Beauty bush' and twin flower' are common names attributed to two well-recognizable species belonging to the genus Linnaea (16 spp.) - L. amabilis and L. borealis - long admired by botanists and gardeners for their perfumed paired bell-shaped flowers. In the present study, we investigated their floral scent compositions through gas chromatography - mass spectrometry (GC-MS) analysis of dynamic headspace samples. Because the flowers of L. borealis in wild populations are fragrant both during the day and in the evening, circadian variation of scent emission was also assessed for this species. In total, 26 chemical compounds comprise the floral scent bouquets of L. amabilis and L. borealis, identified as monoterpenes (14), benzenoids and phenylpropanoids (5), aliphatics (3), sesquiterpenes (3) and irregular terpenes (1). Whereas monoterpenes, notably (-)-- and -pinene, dominated the scent of L. amabilis (over 82% relative abundance), benzene derivates: 1,4 dimethoxybenzene, anisaldehyde, 2-phenylethanol, benzaldehyde and nicotinaldehyde were exclusive to analysed headspace samples of L. borealis, accounting for 52% to 100% of their relative compositions, in three Swedish populations. A southwestern Finnish population was characterized by the four first mentioned benzenoid compounds and large amounts of (-)-- and -pinenes plus two aliphatic substances. The scent compounds identified for both species are ubiquitous and may serve as generalist attractants/stimulants for a broad assortment of anthophilous insects. The basic work on the flower scent of L. amabilis and L. borealis should inspire studies of their pollination biology, primarily the behaviour-guiding roles of the characteristic emitted volatiles.
Subject: Linnaeus
Linnaea borealis
L. amabilis
floral VOCs
insect pollinators
chirality
1,4-dimethoxybenzene
benzaldehyde
2-phenylethanol
anisaldehyde
nicotinaldehyde
(-)-alpha-pinene
beta-pinene
BEHAVIORAL-RESPONSES
ORCHIDACEAE
PLANT
POLLINATION
ADAPTATION
VOLATILES
BOREALIS
MOTH
1183 Plant biology, microbiology, virology
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