| Project/Area Number |
60304011
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
動物発生・生理学
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| Research Institution | Nagasaki University |
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Principal Investigator |
MIMURA Keiichi Nagasaki Univ., Fac. of Liberal Arts , Professor, 教養部, 教授 (20039754)
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| Co-Investigator(Kenkyū-buntansha) |
CHIBA Yoshihiko Yamaguchi Univ., Fac. of Science , Professor, 理学部, 教授 (30004310)
TOMINAGA Yoshiya Fukuoka Univ., Fac. of Science , Professor, 理学部, 教授 (70078591)
TATEDA Hideki Kyushu Univ., Fac. of Science ,Professor, 理学部, 教授 (10037179)
YAMAGUCHI Tsuneo Okayama Univ., Fac. of Science , Professor, 理学部, 教授 (60000816)
YOSHIDA Masao Okayama Univ., Fac. of Science , Professor, 理学部, 教授 (50032793)
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| Project Period (FY) |
1985 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥9,700,000 (Direct Cost: ¥9,700,000)
Fiscal Year 1987: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1986: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1985: ¥4,600,000 (Direct Cost: ¥4,600,000)
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| Keywords | Invertebrates / Visual system / Photoreceptor cell / Photopigment / Neuronal circuit / Plasticity / Species specialty / 種普遍性 / 視覚 / 情報処理機構 / 光受容器 / 視覚神経系 / 視覚行動 / 個体発生 |
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| Research Abstract |
The purpose of this research project was to investigate the general principle of visual information processing by studying the specialty and the generality of invertebrate vision.
1. Photoreception and photoexcitation: 3-Hydroxyretinal was identified as chromophore of the fly photopigment, and its isomerization process was suggested (Isono). Wide distribution of vitamin A_2 aldehyde, which always coexisted with vitamin A_1 aldehyde, was demonstrated even in invertebrate eyes (Suzuki). A pentachromatic vision system, which included a red receptor cell, was found in the butterfly eye as the first example (Eguchi; Tominaga). Metabolic turnover in photoreceptive membrane in insects was different from in vertebrate (Hirosawa). Photoexcitation processes in Onchidium extraocular photoreceptor were common with in vertebrate (Gotow). Localization of rhodopsin molecules within the fly photoreceptor cell was demonstrated by using together monoclonal antibody and electron microscopy (Tominaga). Ada
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ptation mechanisms of the photoreceptor cell to environment were studied (Suzuki; Eguchi).
2. Neuronal circuit concerned in visual information processing: The responses of the 2nd- and 3rd-order neurons in the ocellus of the cockroach showed the common property in the system dynamics (Tateda). The generality and the specialty were investigated on the moving detector in the simple eyes of the spider (Yamashita) and on the neuronal circuits of the crayfish (Yamaguchi).
3. Ontogenic and behavioral studies on visual function: A circadian pacemaker localized at the optic lobe in the cricket and at the cerebral lobe in the mosquito, and it was influenced by environmental light (Chiba). The differentiation of the solitary ascidians' eye and the photosensory cells of amphioxus were investigated (Yoshida). The development of higher function of vision in the fly depended on visual experience in early period of the post-emergence (Mimura).
From the above results, it is concluded that the specialty is seen on morphology and substance and the generality is mainly seen on function. Less
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