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Clin Exp Allergy

Title:		Identification of volatile organic compounds emitted in the field by oilseed rape (Brassica napus ssp. oleifera) over the growing season
Author(s):		McEwan M; Macfarlane Smith WH;
Address:		"Scottish Crop Research Institute, Invergowrie, Dundee, UK"
Journal Title:		Clin Exp Allergy
Year:		1998
Volume:		28
Issue:		3
Page Number:		332 - 338
DOI:		10.1046/j.1365-2222.1998.00234.x
ISSN/ISBN:		0954-7894 (Print) 0954-7894 (Linking)
Abstract:		"BACKGROUND: Oilseed rape has been associated by rural dwellers with seasonal symptoms, such as sneezing, coughing, headache and eye irritation, during its flowering season, for a number of years. This study was performed to identify the volatile chemicals emitted from oilseed rape in the field. OBJECTIVE: The objective of this study was to establish which volatile chemicals may be causative factors of oilseed rape allergy/toxicity. METHODS: The volatile organic compounds were sampled over the flowering period using a modified entrainment technique for headspace analysis under field conditions. These volatiles were then identified using thermal desorption-gas chromatography-mass spectrometry. RESULTS: The major constituents identified were the monoterpenes limonene, sabinene, beta-myrcene, and cis-3-hexen-l-ol acetate, a 'green leaf' volatile. The minor constituents included monoterpenes, sesquiterpenes, short chain aldehydes and ketones, other 'green leaf' volatiles and organic sulphides including the respiratory irritant, dimethyl disulphide. CONCLUSIONS: This report highlights the diversity of volatile chemicals emitted by oilseed rape and confirms field emissions to be broadly similar to those found previously in laboratory studies. A review is carried out on the scientific literature already published on oilseed rape flower headspace analysis"
Keywords:		"Aldehydes/analysis Allergens/*analysis Brassica/*chemistry/growth & development/immunology Chromatography, Gas Ketones/analysis Mass Spectrometry Oils, Volatile/analysis Plant Oils Seasons Terpenes/*analysis;"
Notes:		"MedlineMcEwan, M Macfarlane Smith, W H eng Research Support, Non-U.S. Gov't England 1998/05/30 Clin Exp Allergy. 1998 Mar; 28(3):332-8. doi: 10.1046/j.1365-2222.1998.00234.x"