Sexually transmitted chemical defense in a moth (Utetheisa ornatrix)
Sexually transmitted chemical defense in a moth (Utetheisa ornatrix)
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DOI：
10.1073/pnas.96.10.5570
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发表时间：
1999-05-11
影响因子：
11.1
通讯作者：
Eisner, T
中科院分区：
文献类型：
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作者：
González, A;Rossini, C;Eisner, T
摘要拟除虫菊酯（Utetheisa ornatrix）是一种保护拟除虫菊酯不被捕食的生物碱，它在幼虫期从其食物植物中隔离出来。早期的研究表明，雄性通过精子包将PA传递给雌性，雌性将部分礼物赋予卵子，从而保护卵子免受捕食。我现在要说明的是，女性自己从礼物中得到保护。缺乏PA的女性容易受到蜘蛛（Lycosa ceratiola和Nephila clavipes）的捕食。如果与一个PA负载男性交配，女性成为不可接受的猎物。这种影响迅速而持久;雌性蜘蛛实际上从与雄性蜘蛛分离的那一刻起就不被接受，随着年龄的增长仍然不被接受。化学数据表明，女性分配收到PA迅速到所有身体部位。我们预测，还会发现雌性昆虫因接受性传播的化学物质而变得刀枪不入的其他例子。
The arctiid moth Utetheisa ornatrix is protected against predation by pyrrolizidine alkaloids (PA) that it sequesters as a larva from its food plant. Earlier work had shown that males transmit PA to the female with the sperm package and that the female bestows part of this gift on the eggs, protecting these against predation as a result. me now show that the female herself derives protection from the gift. Females deficient in PA are vulnerable to predation from spiders (Lycosa ceratiola and Nephila clavipes). If mated with a PA-laden male, the females become unacceptable as prey. The effect takes hold promptly and endures; females are unacceptable to spiders virtually from the moment they uncouple from the male and remain unacceptable as they age. Chemical data showed that the female allocates the received PA quickly to all body parts. We predict that other instances will be found of female insects being rendered invulnerable by receipt of sexually transmitted chemicals.