Differential selection of host plants by two Pieris species: the role of oviposition stimulants and deterrents
Differential selection of host plants by two Pieris species: the role of oviposition stimulants and deterrents
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两种菜粉蝶属物种对寄主植物的差异选择：产卵刺激剂和威慑剂的作用
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
J. Renwick
中科院分区：
文献类型：
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作者：
Xinpei Huang;J. Renwick
菜粉蝶的产卵反应和甘蓝型油菜（P.napioleraceaHarris）对9种十字花科植物、1种山柑科植物和1种旱金莲科植物的直接比较。还对这两种昆虫测试了来自这些植物的化学级分是否存在产卵刺激剂或抑制剂。结果表明，植物化学成分是这些粉蝶对潜在寄主进行差异选择的关键因素。有些植物物种同样能被两种粉蝶所接受。然而，油菜疫霉更喜欢卷心菜，而甘蓝疫霉强烈地喜欢油菜疫霉所避免的植物物种。在大多数情况下，所观察到的偏好被解释为植物提取物中存在刺激物和威慑物。这两种粉蝶显然已经进化出不同的敏感性化学刺激，触发或阻止产卵。由植物化学物质引起的正向和负向解释的感觉信号的平衡显然在两个物种对植物的接受或拒绝中起着重要作用。特定的硫代葡萄糖苷和不同的结构活性关系的作用提出了建议。
Oviposition responses of Pieris rapae L. and P. napi oleracea Harris to nine crucifers, one Capparidaceae and one Tropaeolaceae were directly compared under controlled conditions. Chemical fractions from these plants were also tested on both insects for the presence of oviposition stimulants or deterrents. The results showed that plant chemistry is a key factor in differential selection of potential hosts by these Pieris species. Some plant species were equally acceptable to both Pieris species. However, P. rapae preferred cabbage over most test plants whereas P. napi oleracea strongly preferred plant species that were avoided by P. rapae. The observed preferences were explained in most cases by the presence of stimulants and deterrents in extracts of the plants. The two Pieris species have apparently evolved differential sensitivities to the chemical stimuli that trigger or deter oviposition. The balance of positively and negatively interpreted sensory signals evoked by plant chemicals obviously plays an important role in acceptance or rejection of a plant by both species. The role of specific glucosinolates and differing structure‐activity relationships is suggested.