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Phytochemistry

Title:		Flower color-flower scent associations in polymorphic Hesperis matronalis (Brassicaceae)
Author(s):		Majetic CJ; Raguso RA; Tonsor SJ; Ashman TL;
Address:		"Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA. cam21@pitt.edu"
Journal Title:		Phytochemistry
Year:		2007
Volume:		20070126
Issue:		6
Page Number:		865 - 874
DOI:		10.1016/j.phytochem.2006.12.009
ISSN/ISBN:		0031-9422 (Print) 0031-9422 (Linking)
Abstract:		"Floral scent emission rate and composition of purple and white flower color morphs of Hesperis matronalis (Brassicaceae) were determined for two populations and, for each, at two times of day using dynamic headspace collection and GC-MS. The floral volatile compounds identified for this species fell into two main categories, terpenoids and aromatics. Principal component analysis of 30 compounds demonstrated that both color morphs emitted more scent at dusk than at dawn. Color morphs varied in chemical composition of scent, but this differed between populations. The white morphs exhibited significant differences between populations, while the purple morphs did not. In the white morphs, one population contains color-scent associations that match expectations from classical pollination syndrome theory, where the flowers have aromatic scents, which are expected to maximize night-flying moth pollinator attraction; in the second population, white morphs were strongly associated with terpenoid compounds. The potential impact that pollinators, conserved biosynthetic pathways, and the genetics of small colonizing populations may have in determining population-specific associations between floral color and floral scent are discussed"
Keywords:		Analysis of Variance Brassicaceae/metabolism/*physiology Flowers/metabolism/*physiology Gas Chromatography-Mass Spectrometry *Odorants Pigmentation/*physiology Principal Component Analysis Terpenes/chemistry/metabolism;
Notes:		"MedlineMajetic, Cassie J Raguso, Robert A Tonsor, Stephen J Ashman, Tia-Lynn eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2007/01/30 Phytochemistry. 2007 Mar; 68(6):865-74. doi: 10.1016/j.phytochem.2006.12.009. Epub 2007 Jan 26"