کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10880252 1076948 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Studies on the cardenolide sequestration in African milkweed butterflies (Danaidae)
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیوشیمی، ژنتیک و زیست شناسی مولکولی (عمومی)
پیش نمایش صفحه اول مقاله
Studies on the cardenolide sequestration in African milkweed butterflies (Danaidae)
چکیده انگلیسی
Butterflies of the Danaidae family are considered to be toxic or distasteful due to the presence of cardiac glycosides sequestered from their larval food plants. Alcoholic extracts of specimens of Danaus chrysippus aegyptius and Amauris ochlea ochlea from southern Africa (Namibia, S.-Africa, Mozambique) were analyzed by thin-layer chromatography for these cardenolides. But only 4 of 75 specimens of D. chrysippus aegyptius contained trace amounts, all others including 13 specimens of A. ochlea ochlea were negative. Genetic analysis of the ouabain binding site of the Na+, K+-ATPase revealed that both species do not present an amino acid replacement at the position 122, which otherwise makes the enzyme insensitive to cardenolides suggesting that other strategies of toxin tolerance must have been developed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Toxicon - Volume 45, Issue 5, April 2005, Pages 581-584
نویسندگان
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