Meijerink J, Braks M A, Van Loon J J
Laboratory of Entomology, Wageningen University, PO Box 8031, 6700 EH, Wageningen, The Netherlands
J Insect Physiol. 2001 Apr;47(4-5):455-64. doi: 10.1016/s0022-1910(00)00136-0.
Electrophysiological studies on female An. gambiae s.s. mosquitoes revealed a receptor neuron within a subpopulation of the antennal grooved-peg sensilla sensitive to the odour of incubated sweat, but not responding to fresh sweat. This receptor neuron was sensitive to ammonia as well, a sweat-borne component which attracts female An. gambiae in a windtunnel bioassay. Neurons innervating a different subpopulation of grooved-peg sensilla did not show a response to incubated sweat. In the latter sensilla, however, one type of neuron responded to water or water containing solutions, while another receptor neuron was inhibited when stimulated with dry air, ether or ethanol. Neurons innervating sensilla trichodea, a more abundant antennal type of olfactory sensillum, did not respond to fresh or incubated sweat at the doses offered. However, receptor neurons within the sensilla trichodea responded with excitation to several sweat-borne components. A subpopulation of the sensilla trichodea was innervated by neurons sensitive to geranyl acetone. A second subpopulation housed receptor neurons sensitive to indole. 3-Methyl-1-butanol and 6-methyl-5-hepten-2-one evoked excitation of receptor neurons within both subpopulations of sensilla trichodea. Neurons were most sensitive to indole and geranyl acetone with a threshold of 0.01%. These findings are discussed in the context of host-seeking behaviour.
对冈比亚按蚊指名亚种雌蚊的电生理研究表明，触角槽形栓状感器亚群中的一个受体神经元对孵育汗液的气味敏感，但对新鲜汗液无反应。该受体神经元对氨也敏感，氨是汗液中的一种成分，在风洞生物测定中能吸引冈比亚按蚊雌蚊。支配不同槽形栓状感器亚群的神经元对孵育汗液无反应。然而，在后者的感器中，一种神经元对水或含水溶液有反应，而另一种受体神经元在用干燥空气、乙醚或乙醇刺激时受到抑制。支配毛形感器（触角上更丰富的嗅觉感器类型）的神经元对所提供剂量的新鲜或孵育汗液无反应。然而，毛形感器内的受体神经元对几种汗液成分有兴奋反应。毛形感器的一个亚群由对香叶基丙酮敏感的神经元支配。第二个亚群中有对吲哚敏感的受体神经元。3-甲基-1-丁醇和6-甲基-5-庚烯-2-酮在毛形感器的两个亚群中均引起受体神经元的兴奋。神经元对吲哚和香叶基丙酮最敏感，阈值为0.01%。在寻找宿主行为的背景下对这些发现进行了讨论。
