Department of Entomology, University of Alberta, T6G 2E3, Edmonton, Alberta, Canada.
J Chem Ecol. 1985 Jan;11(1):73-83. doi: 10.1007/BF00987607.
Steroidal glycoalkaloids, found in species of the Solanaceae, elicit bursting activity in galeal and tarsal chemosensilla of adult Colorado potato beetles. The effect has an average latency of 6-12 sec, depending on the sensillum/alkaloid combination. A 20-sec alkaloid treatment is often suffficient to render galeal sensilla unresponsive to gamma-aminobutyric acid, normally an effective stimulant. The alkaloids have similar effects on galeal sensilla of larval Colorado potato beetles and on labellar chemosensilla of the blowfly. It is concluded that these compounds act independently of any specialized chemoreceptor in the Colorado potato beetle, and that association of the Colorado potato beetle with solanaceous plants has not led to evolution of a specific receptor forSolanum glycoalkaloids.
甾体糖苷生物碱存在于茄科的某些物种中，能引起成年科罗拉多马铃薯甲虫的额和跗节化感器产生爆发式活性。这种效应的潜伏期平均为 6-12 秒，具体取决于感器/生物碱的组合。通常，20 秒的生物碱处理就足以使额感器对γ-氨基丁酸（通常是一种有效的刺激物）失去反应。这些生物碱对科罗拉多马铃薯甲虫幼虫的额感器和蕈蚊的唇化学感器具有相似的作用。可以得出结论，这些化合物独立于科罗拉多马铃薯甲虫中的任何专门的化学感受器起作用，并且科罗拉多马铃薯甲虫与茄科植物的联系并没有导致对茄科糖苷生物碱的特定受体的进化。
