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Dark adaptation in the eyes of a lake and a sea population of opossum shrimp (Mysis relicta): retinoid isomer dynamics, rhodopsin regeneration, and recovery of light sensitivityстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 ноября 2020 г.
- Авторы: Feldman Tatiana, Yakovleva Marina, Martta Viljanen, Lindström Magnus, Donner Kristian, Ostrovsky Mikhail
- Журнал: Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology
- Том: 206
- Год издания: 2020
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 871
- Последняя страница: 889
- DOI: 10.1007/s00359-020-01444-4
- Аннотация: We have studied dark-adaptation at three levels in the eyes of the crustacean Mysisrelicta over 2-3 weeks after exposing initially dark-adapted animals to strong whitelight: regeneration of 11-cis retinal through the retinoid cycle (by HPLC), restoration ofnative rhodopsin in photoreceptor membranes (by MSP), and recovery of eyephotosensitivity (by ERG). We compare two model populations (“sea”, Sp, and “lake”,Lp) inhabiting, respectively, a low-light and an extremely dark environment. 11-cisretinal reached 60-70% of the pre-exposure levels after 2 weeks in darkness in bothpopulations. The only significant Lp/Sp difference in the retinoid cycle was that Lp hadhigher levels of retinol, both basal and light-released. In Sp, rhodopsin restoration andeye photoresponse recovery parallelled 11-cis retinal regeneration. In Lp, however,even after 3 weeks only ca. 25% of rhabdoms had incorporated new rhodopsin, andeye photosensitivity showed only incipient recovery from severe depression. Theabsorbance spectra of the majority of the Lp rhabdoms stayed constant around 490-500 nm, consistent with metarhodopsin II dominance. We conclude that sensitivityrecovery of Sp eyes was rate-limited by the regeneration of 11-cis retinal, whilst that ofLp eyes was limited by inertia in photoreceptor membrane turnover.
- Добавил в систему: Фельдман Татьяна Борисовна