Light-Stimulated Green Coloration of Silk Glands in the Saturniid Moth, Antheraea yamamai : Influence of Ligation and Parabiosis(Physiology)
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Developmental timing of pigmentation of the silk glands and a possible photoreceptive site responsible for the green coloration were examined in Antheraea yamamai. At the time of gut purge, the silk glands became green under high intensity light (5,000lx) whereas they were yellow under low intensity light (20-30lx). Green coloration occurred in larval transfer from low intensity to high intensity at gut-purge stage whereas reverse transfer reduced the degree of green coloration, indicating that light of high intensity must be irradiated continuously during the stage. When the neck-ligated larvae or isolted abdomens, both of which had been kept in low intensity and were ligated at the time of gut purge, were wholly or partially irradiated at high intensity, green coloration was seen in any cases. Removal of all ventral ganglia from the isolated abdomens has no adverse effect on green coloration in either light condition. In the parabiosis experiments, in which two decapitated larvae kept in low intensity were connected by a transparent tube and one of the partners wholly or partially exposed to light and the other shielded, the silk glands of the shielded animal were green as were those of the exposed ones. Local irradiation to the only region of a connecting tube also caused green coloration in both animals. But, when the flow of hemolymph in the tube was disturbed with a plug, no green coloration occurred in the shielded animal. These suggest that the hemolymph has a crucial role in light reception.
- 社団法人日本動物学会の論文
- 1991-08-15
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