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Daily changes of structure, function and rhodopsin content in the compound eye of the crab Hemigrapsus sanguineus
https://ir.soken.ac.jp/records/3609
https://ir.soken.ac.jp/records/36098b409b50-d0bb-4636-b6e6-c9d7db9ea274
| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||||||
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| 公開日 | 2013-06-24 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | Daily changes of structure, function and rhodopsin content in the compound eye of the crab Hemigrapsus sanguineus | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | Daily changes of structure, function and rhodopsin content in the compound eye of the crab Hemigrapsus sanguineus | |||||||||||||
| 言語 | en | |||||||||||||
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| 言語 | eng | |||||||||||||
| 資源タイプ | ||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||
| 資源タイプ | journal article | |||||||||||||
| アクセス権 | ||||||||||||||
| アクセス権 | metadata only access | |||||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||||||
| 著者 |
ARIKAWA, Kentaro
× ARIKAWA, Kentaro
× KAWAMATA, Kunihiko
× SUZUKI, Tatsuo
× EGUCHI, Eisuke
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| 著者別名 |
蟻川, 謙太郎
× 蟻川, 謙太郎
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | The compound eye of the crabHemigrapsus sanguineus undergoes daily changes in morphology as determined by light and electron microscopy, both in the quantity of chromophore substances studied by HPLC and in visual sensitivity as shown by electrophysiological techniques. 1.At a temperature of 20 °C, the rhabdom occupation ratio (ROR) of an ommatidial retinula was 11.6% (maximum) at midnight, 8.0 times larger than the minimum value at midday (1.4%) (Figs. 2, 6). 2.Observations by freeze-fracture revealed that the densities of intra-membranous particles (9–11 nm in diameter) of rhabdomeric membrane were ca. 2000/μm2 and ca. 3000/μm2 for night and daytime compound eyes, respectively (Fig. 3). 3.Screening pigment granules migrated longitudinally and aggregated at night, but dispersed during the day. Reflecting pigment granules migrate transversally in the proximal half of the retinula layer i.e. cytoplasmic extensions containing reflecting pigment granules squeeze between neighbouring retinula cells causing optical isolation (Fig. 4). Thus the screening pigment granules within the retinula cells show longitudinal migration and radial movement so that the daytime rhabdoms are closely surrounded by the pigment granules (Fig. 2). 4.At 20 °C, the total amount of chromophore of the visual pigment (11-cis and all-trans-retinal) was 1.4 times larger at night than during the day i.e. 46.6 pmol/eye at midnight and 33.2 pmol/eye at midday (Fig. 9). Calculations of the total surface area of rhabdomeric membrane, total number of intra-membranous particles in rhabdomeric membrane and the total number of chromophore molecules in a compound eye, indicate that a considerable amount of chromophore-protein complex exists outside the rhabdom during the day. 5.The change in rhabdom size and quantity of chromophore were highly dependent on temperature. At 10 °C both rhabdom size and amount of chromophore stayed close to daytime levels throughout the 24 hours (Figs. 6, 9). 6.The intracellularly determined relative sensitivity of the dark adapted night eye to a point source of light was about twice as high as the darkadapted day eye (Fig. 10). Most of the increase in the sensitivity is attributed primarily to the effect of reflecting pigment migration around the basement membrane (Fig. 4) and, secondarily, to the changes in the amount and properties of the photoreceptive membrane. The results form the basis of a detailed discussion as to how an apposition eye can function possibly as a night-eye. |
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| 書誌情報 |
Journal of Comparative Physiology A en : Journal of Comparative Physiology A 巻 161, 号 2, p. 161-174, 発行日 1987-03 |
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| 出版者 | ||||||||||||||
| 出版者 | SpringerLink | |||||||||||||
| ISSN | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 03407594 | |||||||||||||
| DOI | ||||||||||||||
| 識別子タイプ | DOI | |||||||||||||
| 関連識別子 | http://doi.org/10.1007/BF00615238 | |||||||||||||
| 関連名称 | 10.1007/BF00615238 | |||||||||||||
| 権利 | ||||||||||||||
| 権利情報 | SpringerLink(The original publication is available at www.springerlink.com) | |||||||||||||
