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Phytochemistry

Title:		Between plant and diurnal variation in quantities and ratios of volatile compounds emitted by Vicia faba plants
Author(s):		Webster B; Gezan S; Bruce T; Hardie J; Pickett J;
Address:		"Rothamsted Research, Biological Chemistry Department, Harpenden, Hertfordshire AL52JQ, United Kingdom"
Journal Title:		Phytochemistry
Year:		2010
Volume:		20091026
Issue:		1
Page Number:		81 - 89
DOI:		10.1016/j.phytochem.2009.09.029
ISSN/ISBN:		1873-3700 (Electronic) 0031-9422 (Linking)
Abstract:		"Ratios of volatile phytochemicals potentially offer a means for insects to recognise their host-plant species. However, for this to occur ratios of volatiles would need to be sufficiently consistent between plants and over time to constitute a host-characteristic cue. In this context we collected headspace samples from Vicia faba plants to determine how consistent ratios of key volatile phytochemicals used in host location by one of its insect pests, the black bean aphid, Aphis fabae, were. These were (E)-2-hexenal, (Z)-3-hexen-1-ol, 1-hexanol, benzaldehyde, 6-methyl-5-hepten-2-one, octanal, (Z)-3-hexen-1-yl acetate, (R)-linalool, methyl salicylate, decanal, undecanal, (E)-caryophyllene, (E)-beta-farnesene, (S)-germacrene D, and (E,E)-4,8,12-trimethyl-1,3,7,11-tridecatetraene, which had previously been found to be electrophysiologically and behaviourally active to A. fabae. Although the quantities of volatiles produced by V. faba showed large between plant and diurnal variation, correlations between quantities of compounds indicated that the ratios of certain pairs of volatiles were very consistent. This suggests that there is a host-characteristic cue available to A. fabae in the form of ratios of volatiles"
Keywords:		Animals *Aphids Genetic Variation *Host-Parasite Interactions Photoperiod *Plant Diseases Vicia faba/genetics/*metabolism Volatile Organic Compounds/*metabolism;
Notes:		"MedlineWebster, Ben Gezan, Salvador Bruce, Toby Hardie, Jim Pickett, John eng Biotechnology and Biological Sciences Research Council/United Kingdom Research Support, Non-U.S. Gov't England 2009/10/30 Phytochemistry. 2010 Jan; 71(1):81-9. doi: 10.1016/j.phytochem.2009.09.029. Epub 2009 Oct 26"