CARDIAC-GLYCOSIDES IN NORTH-AMERICAN ASCLEPIADACEAE, A BASIS FOR UNPALATABILITY IN BRIGHTLY COLORED HEMIPTERA AND COLEOPTERA
CARDIAC-GLYCOSIDES IN NORTH-AMERICAN ASCLEPIADACEAE, A BASIS FOR UNPALATABILITY IN BRIGHTLY COLORED HEMIPTERA AND COLEOPTERA
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DOI：
10.1016/0022-1910(72)90065-0
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发表时间：
1972-01-01
影响因子：
2.2
通讯作者：
SCUDDER, GGE
中科院分区：
文献类型：
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作者：
DUFFEY, SS;SCUDDER, GGE
18种马利筋属植物和1种槭属植物含有强心苷，并含有不同数量和类型的强心内酯。还报道了给定植物物种的各种组织内强心内酯含量的变化。因此，一种植物可以提供一系列的化合物供昆虫食用。七种以马利筋为食的色彩鲜艳的昆虫被证明含有强心内酯。特别是Oncopeltus fasciatus被证明从Asclepias syriaca的种子中获得大量的强心内酯，并能从其他的萝摩中提取这些化合物。大量颜色鲜艳、形状相似的萝摩中存在强心内酯，这些昆虫可能一起出现，为一种拟态复合体奠定了化学基础，这种复合体可能延伸到北美大陆的相当大一部分，并进入加勒比海。这种拟态复合体可能是基于某种形式的令人厌恶的cardenoprotein水平的存在，但由于明亮颜色的半翅目的挥发性分泌物的存在而变得复杂和加强。
Eighteen species ofAsclepiasand one species ofAcerateshave been shown to contain cardiac glycosides and to have different numbers and types of cardenolides. Variation in content of cardenolides within the various tissues of a given species of plant is also reported. Thus a single species of plant can provide a spectrum of compounds upon which insects can feed.Seven species of brightly coloured insects that feed uponAsclepiaswere shown to contain cardenolides.Oncopeltus fasciatusin particular was shown to derive large quantities of cardenolides from seeds ofAsclepias syriaca, and is capable of deriving these compounds from other Asclepiads.The presence of cardenolides in a large number of brightly coloured and similarly shaped insects, which may occur together, establishes the chemical basis for a mimicry complex which may extend over a considerable part of the North American continent and into the Caribbean. This mimicry complex presumably is based on the presence of distasteful levels of cardenolide in some form, but is complicated and reinforced by the presence of the volatile secretions of the brightly coloured Hemiptera.