On the function of sex pheromone components in Periplaneta americana: improved odour source localization with periplanone‐A
On the function of sex pheromone components in Periplaneta americana: improved odour source localization with periplanone‐A
复制标题
美洲大蠊性信息素成分的功能：利用大蠊酮-A 改进气味源定位
DOI：
10.1111/j.1365-3032.1985.tb00038.x
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发表时间：
1985
影响因子：
1.5
通讯作者：
S. Gagel
中科院分区：
文献类型：
--
作者：
G. Seelinger;S. Gagel
摘要。雌性美洲大蠊（Periplaneta americana L.）产生两种性信息素组分：periplanone-A（PA）和periplanone-B（PB）。PB诱导雄性运动和逆风方向。PA单独存在时具有相同的效果，但阈值浓度更高。然而，当以自然比例添加到PB中时，PA减少而不是增加运动活动。为了检查PA是否影响天然混合物中的雄性取向，将信息素源悬挂在圆形竞技场的中心上方。努力排除空气运动，使信息素浓度下降离心。当呈现低剂量时，在PB梯度中行走的男性在源附近花费的时间比在外围区域花费的时间更多。在排放率大致相当于一个女性，但是，他们无法定位信息素的来源，因为在较低的利率。相反，男性走在PA梯度花更多的时间在中心的竞技场时，信息素剂量增加。当PA被添加到PB的自然水平，男性走得更慢，更频繁地停止附近的源比PB单独。因此，当PA与PB以自然比例呈现时，PA改善了男性的化疗方向。在这个过程中涉及的信息素源附近的线速度的减少（一个orthokinetic效应）。
ABSTRACT. The female American cockroach, Periplaneta americana L., produces two sex pheromone components: periplanone‐A (PA) and periplanone‐B (PB). PB induces male locomotion and upwind orientation. PA, when presented alone, has the same effect but with a higher threshold concentration. When added to PB in the natural ratio, however, PA reduces rather than increases locomotory activity. To examine whether PA affects male orientation in the natural blend, a pheromone source was suspended above the centre of a circular arena. Efforts were made to exclude air movements so that pheromone concentration declined centrifugally. Males walking in a PB gradient spent more time near the source than in the peripheral areas when low doses were presented. At emission rates approximately equivalent to those of a female, however, they were not able to locate the pheromone source as precisely as at lower rates. In contrast, males walking in a PA gradient spent more time in the centre of the arena when the pheromone dosage was increased. When PA was added to natural levels of PB, males walked more slowly and stopped more frequently near the source than with PB alone. Thus PA improves chemo‐orientation of males when presented in a natural ratio with PB. A reduction of linear velocity near the pheromone source (an orthokinetic effect) is involved in this process.