Different feeding and gustatory responses to ecdysone and 20-hydroxyecdysone by larvae of the silkworm,Bombyx mori |
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| Authors: | Yoshiaki Tanaka Kiyoshi Asaoka Satoshi Takeda |
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| Affiliation: | (1) Department of Insect Physiology and Behavior, National Institute of Sericultural and Entomological Science, 305 Tsukuba, Ibaraki, Japan |
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| Abstract: | The feeding and gustatory responses to ecdysone and 20-hydroxyecdysone were investigated in the silkworm,Bombyx mori. 20-Hydroxyecdysone reduced feeding response strongly in fourth- and fifth-instar larvae, whereas ecdysone had no effect on feeding response. 20-Hydroxyecdysone stimulated the R receptor, the receptor to feeding deterrents, to a great degree. By contrast, ecdysone was much less effective for stimulating the R receptor. These results indicate that ecdysone and 20-hydroxyecdysone have different effects on feeding response due to different interactions with mouthpart chemoreceptors. |
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| Keywords: | Bombyx mori Lepidoptera Bombiridae silkworm larvae ecdysone 20-hydroxyecdysone feeding behavior electrophysiology sensilla response chemoreceptors |
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