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Clin Exp Allergy

Title:		The identification of potential aeroallergen/irritant(s) from oilseed rape (Brassica napus spp. oleifera): volatile organic compounds emitted during flowering progression
Author(s):		Butcher RD; MacFarlane-Smith W; Robertson GW; Griffiths DW;
Address:		"Scottish Crop Research Institute, Invergowrie, Dundee, UK"
Journal Title:		Clin Exp Allergy
Year:		1994
Volume:		24
Issue:		12
Page Number:		1105 - 1114
DOI:		10.1111/j.1365-2222.1994.tb03315.x
ISSN/ISBN:		0954-7894 (Print) 0954-7894 (Linking)
Abstract:		"Volatile organic compounds emitted by growing intact oilseed rape plants have been detected using an entrainment apparatus enabling volatile headspace analysis by thermal desorption coupled to capillary gas chromatography-mass spectrometry. In total, 22 volatile compounds were identified as being emitted during the flowering period. The main constituents were alpha-farnesene (a sesquiterpene); beta-myrcene (a monoterpene); linalool (a monoterpene alcohol) and the 'green leaf' volatile (E)-3-hexen-1-ol acetate. These compounds constituted between 50 and 87% (mean 68%) of the total volatiles emitted in all of the entrainments carried out with flowering oilseed rape plants. The remaining constituents consisted of a range of compounds including other terpenoids, the characteristic 'green leaf' volatile (E)-3-hexen-1-ol, short chain alcohols and ketones, organic sulphides and nitrogen-containing compounds. These were generally present as minor constituents but some plant entrainments revealed that higher relative amounts could be emitted. This was particularly apparent for dimethyl disulphide, 3-methyl-2-pentanone, 3-hydroxy-2-butanone, sabinene, isomyrcenol and (E)-3-hexen-1-ol. The possible role of the 22 compounds in respiratory mucosa and conjunctiva irritation associated with airborne releases from oilseed rape is discussed"
Keywords:		"Air Pollutants/adverse effects/*analysis Allergens/adverse effects/*analysis Brassica/*chemistry/physiology Conjunctiva/drug effects Fatty Acids, Monounsaturated Gas Chromatography-Mass Spectrometry Humans Hypersensitivity/etiology Irritants/adverse effec;"
Notes:		"MedlineButcher, R D MacFarlane-Smith, W Robertson, G W Griffiths, D W eng Research Support, Non-U.S. Gov't England 1994/12/01 Clin Exp Allergy. 1994 Dec; 24(12):1105-14. doi: 10.1111/j.1365-2222.1994.tb03315.x"