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brassica_napus_l [2015/05/08 22:32]
andreas |
brassica_napus_l [2015/05/08 22:51]
andreas |
| [[http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200009263]] | [[http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200009263]] |
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| "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 α-farnesene (a sesquiterpene); β-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." \\ | "The glucosinolate content of three fodder kales, one fodder rape, one semi-artificial rape and one radicole were determined. The major glucosinolates (mmol kg−1 dry matter) were: in kale leaf, glucobrassicin (3.21) and sinigrin (3.12); in kale stem, sinigrin (5.82); in rape leaf, gluconapin (3.14) and progoitrin (13.99); in rape stem, gluconapin (3.29) and progoitrin (20.18); in semi-artificial rape leaf, gluconapin (25.64) and progoitrin (9.00); in semi-artificial rape stem, gluconapin (35.33) and progoitrin (12.08); in radicole leaf, progoitrin (4.74) and glucobrassicin (3.28); and in radicole stem, gluconapin (3.26) and progoitrin (5.53)." \\ |
| | [The glucosinolate content of the leaf and stem of fodder kale (Brassica oleracea L.), Rape (Brassica napus L.) and radicole (Raphanobrassica)., Bradshaw, J.E., Heaney, R.K., Fenwick, G.R., McNaughton, I.H., Journal of the Science of Food and Agriculture, Vol.34(6), 1984, 571-575] |
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| | "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 α-farnesene (a sesquiterpene); β-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 =[[http://www.thegoodscentscompany.com/data/rw1007331.html|acetoin]], 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." \\ |
| [The identification of potential aeroallergen/irritant (s) from oilseed rape (Brassica napus spp. oleifera): volatile organic compounds emitted during flowering progression., Butcher, R.D., Macfarlane‐Smith, W., Robertson, G.W., Griffiths, D.W., Clinical & Experimental Allergy, Vol.24(12), 1994, 1105-1114] | [The identification of potential aeroallergen/irritant (s) from oilseed rape (Brassica napus spp. oleifera): volatile organic compounds emitted during flowering progression., Butcher, R.D., Macfarlane‐Smith, W., Robertson, G.W., Griffiths, D.W., Clinical & Experimental Allergy, Vol.24(12), 1994, 1105-1114] |
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| [Emission of volatiles from flowers and leaves of Brassica napus in situ., Jakobsen, H.B., Friis, P., Nielsen, J.K., Olsen, C.E., Phytochemistry, Vol.37(3), 1994, 695-699] | [Emission of volatiles from flowers and leaves of Brassica napus in situ., Jakobsen, H.B., Friis, P., Nielsen, J.K., Olsen, C.E., Phytochemistry, Vol.37(3), 1994, 695-699] |
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| "The response of theCeutorhynchus assimilis antenna to volatiles in air entrainment-derived extracts of oilseed rape,Brassica napus, was studied using coupled gas chromatography (GC)-electroantennography (EAG) and coupled GC-single cell recording (SCR). By means of these techniques and coupled gas chromatography-mass spectrometry (GC-MS), 25 active compounds were identified, including isoprenoids and compounds derived from fatty acids and amino acids. Some of the latter, the isothiocyanates and goitrin, and probably indole and benzyl cyanide, are catabolites of glucosinolates." \\ | "The response of the Ceutorhynchus assimilis antenna to volatiles in air entrainment-derived extracts of oilseed rape, Brassica napus, was studied using coupled gas chromatography (GC)-electroantennography (EAG) and coupled GC-single cell recording (SCR). By means of these techniques and coupled gas chromatography-mass spectrometry (GC-MS), 25 active compounds were identified, including isoprenoids and compounds derived from fatty acids and amino acids. Some of the latter, the isothiocyanates and [[https://en.wikipedia.org/wiki/Goitrin|goitrin]], and probably indole and benzyl cyanide, are catabolites of glucosinolates." \\ |
| [Antennal perception of oilseed rape, Brassica napus (Brassicaceae), volatiles by the cabbage seed weevilCeutorhynchus assimilis (Coleoptera, Curculionidae)., Blight, M.M., Pickett, J.A., Wadhams, L.J., Woodcock, C.M., Journal of chemical ecology, Vol.21(11), 1995, 1649-1664] | [Antennal perception of oilseed rape, Brassica napus (Brassicaceae), volatiles by the cabbage seed weevil Ceutorhynchus assimilis (Coleoptera, Curculionidae)., Blight, M.M., Pickett, J.A., Wadhams, L.J., Woodcock, C.M., Journal of chemical ecology, Vol.21(11), 1995, 1649-1664] |
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| "Volatiles from oilseed rape, Brassica napus, flowers were sampled by air entrainment and their relevance to the natural odor profile of the flowers was confirmed by conditioned proboscis extension (CPE) assays with honeybee, Apis mellifera L., foragers. Coupled gas chromatography (GC)-CPE analysis of the air entrainment samples was used to locate key compounds involved in the recognition of B. napus flowers, and the compounds were then identified using coupled gas chromatography-mass spectrometry and comparison with authentic samples. Six regions of the gas chromatograms elicited CPE responses from bees previously conditioned to the total extract, and from these areas 16 compounds were identified that elicited CPE activity from conditioned bees when tested with synthetic samples. Eight of the 16, α-pinene, phenylacetaldehyde, p-cymene, α-terpinene, linalool, 2-phenyl-ethanol, (E,E)-α-farnesene, and 3-carene, gave the highest responses." \\ | "Volatiles from oilseed rape, Brassica napus, flowers were sampled by air entrainment and their relevance to the natural odor profile of the flowers was confirmed by conditioned proboscis extension (CPE) assays with honeybee, Apis mellifera L., foragers. Coupled gas chromatography (GC)-CPE analysis of the air entrainment samples was used to locate key compounds involved in the recognition of B. napus flowers, and the compounds were then identified using coupled gas chromatography-mass spectrometry and comparison with authentic samples. Six regions of the gas chromatograms elicited CPE responses from bees previously conditioned to the total extract, and from these areas 16 compounds were identified that elicited CPE activity from conditioned bees when tested with synthetic samples. Eight of the 16, α-pinene, phenylacetaldehyde, p-cymene, α-terpinene, linalool, 2-phenyl-ethanol, (E,E)-α-farnesene, and 3-carene, gave the highest responses." \\ |
