کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10819232 | 1060370 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transfer of methyl-branched hydrocarbons from the parasitoid, Eretmocerus mundus, to silverleaf whitefly nymphs during oviposition
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موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
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چکیده انگلیسی
The parasitic wasp Eretmocerus mundus (Hymenoptera: Aphelinidae), a natural enemy of the silverleaf whitefly Bemisia argentifolii (Homoptera: Aleyrodidae), deposits eggs beneath nymphs and not within them. Experiments were designed to establish whether ovipositing E. mundus females leave marking chemicals on nymphs to enable searching females to discriminate parasitized from unparasitized hosts. Cuticular lipids from three experimental treatment groups were characterized: parasitoid-exposed nymphs that had a parasitoid egg between the nymph and leaf; control nymphs not exposed to E. mundus; and a third treatment condition of parasitized nymphs, held for 10 days after wasp exposure. Lipids were solvent-extracted from the nymphal cuticles of the various treatment groups and the lipid components were characterized and quantified by gas chromatography and mass spectrometry. Results indicated the presence of quantities of C31 and C33 dimethylalkanes only from parasitoid-exposed groups of nymphs and not in the extracts from control nymphs or the parasitized nymphs after 10-day exposure. Furthermore, the C31 and C33 dimethylalkanes were shown to be major lipid components of the hexane extracts from E. mundus females. Since the lipids were removed from parasitoid-exposed nymphs before interaction with hatched parasitoid larvae, the findings indicated that the dimethylalkanes were transferred onto nymphal cuticles by ovipositing E. mundus females.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 140, Issue 1, January 2005, Pages 59-65
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 140, Issue 1, January 2005, Pages 59-65
نویسندگان
James S. Buckner, Walker A. Jones,