家蚕味觉电生理反应的个体差异

为探讨家蚕Bombyx mori人工饲料饲养发育不齐的生理原因，从同一蚕品种中挑选出对人工饲料摄食性不同的个体，用电生理学方法测定了下颚瘤状体味觉感器对4种代表性物质（蔗糖、肌醇、大豆粉提取物和柠檬酸）的电生理反应。结果表明，栓锥感器Ss-Ⅰ对蔗糖等促食物质的反应以及栓锥感器Ss-Ⅱ对大豆粉提取物等阻食物质的反应，均存在明显的个体差异。在临界浓度下，低摄食性个体的放电脉冲频率显著高于高摄食性个体。说明低摄食性蚕的味觉反应比高摄食性蚕敏感。

Individual differences in gustatory electrophysiological responses of the silkworm,Bombyx mori

In order to reveal the physiological causes of allometric development of the silkworm, Bombyx mori reared with artificial diet, individuals with different acceptance of the artificial diet were selected from a variety. Their physiological responses of the gustatory organ on the maxillary tubercle to four representative components （sucrose, inositol, soybean extract, citric acid）were measured electrophysiologically. The results showed that there were individual differences in the responses of sensillum styloconicum Ss-I to the feeding stimulants (sucrose etc.) and sensillum styloconicum Ss-Ⅱ to the feeding deterrent (soybean extract etc.). At the critical concentration, the discharge frequencies of electric pulse in low feeding individuals were significantly higher than that in high feeding individuals. It showed that the gustation of low feeding silkworms was more sensitive than the high feeding ones.