A neurophysiological study of sensitivity to a feeding deterrent in two sister species of Heliothis with different diet breadths
A neurophysiological study of sensitivity to a feeding deterrent in two sister species of Heliothis with different diet breadths
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DOI：
10.1016/s0022-1910(99)00197-3
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发表时间：
2000-06-01
影响因子：
2.2
通讯作者：
Chapman, RF
中科院分区：
文献类型：
--
作者：
Bernays, EA;Chapman, RF
Heliothis subflexa 和 H. virescens 是姊妹种，它们的寄主植物特异性显着不同：前者专攻一种植物属，后者以许多科的植物为食。 H. subflexa;I 幼虫排斥威慑化学品的行为阈值低于 H. virescens 幼虫。在本文中，我们研究了这些幼虫的帽状腱膜感受器对三种化学物质（蔗糖和肌醇（捕食剂）以及黑芥子苷（威慑剂）刺激的反应，试图确定物种间摄食行为差异的神经基础。物种差异不能归因于威慑敏感细胞放电率的差异、对吞噬刺激剂和威慑剂的反应比率的差异、感觉神经元适应率的差异或外周感觉器化学物质之间相互作用程度的差异。 Wa 得出的结论是，物种之间的差异可能是由于中枢神经系统内处理感觉信息的差异造成的。 (C) 2000 Elsevier Science Ltd. 保留所有权利。
Heliothis subflexa and H. virescens are sister species that differ markedly in their hostplant specificity: the former is a specialist on one plant genus, the latter feeds on plants from many families. The behavioral threshold for rejection of deterrent chemicals is lower in larvae of H. subflexa;I than in those of H. virescens. In this paper, we examine the responses of the galeal styloconic sensilla of these larvae to stimulation by three chemicals, sucrose and inositol, which are phagostimulants, and sinigrin, a deterrent, in an attempt to determine the neural basis for the differences in feeding behavior between the species. The species difference could not be attributed to differences in firing rate of the deterrent-sensitive cells, differences in the ratio of responses to phagostimulants and deterrents, differences in the rates of adaptation of the sensory neurons, or differences in the extent of interactions between chemicals at the peripheral sensilla. Wa conclude that the differences between the species probably result from differences in processing sensory information within the central nervous system. (C) 2000 Elsevier Science Ltd. All rights reserved.