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 sensitivity

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Feldman , T , Yakovleva , M , Viljanen , M L M , Lindström , M , Donner , K & Ostrovsky , M A 2020 , ' 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 sensitivity ' , Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology , vol. 206 , no. 6 , pp. 871-889 . https://doi.org/10.1007/s00359-020-01444-4

Title: 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 sensitivity
Author: Feldman, Tatiana; Yakovleva, Marina; Viljanen, Martta Leena Maria; Lindström, Magnus; Donner, Kristian; Ostrovsky, M.A.
Contributor: University of Helsinki, Molecular and Integrative Biosciences Research Programme
University of Helsinki, Marine Ecosystems Research Group
University of Helsinki, Molecular and Integrative Biosciences Research Programme
Date: 2020-09-03
Language: eng
Number of pages: 19
Belongs to series: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
ISSN: 0340-7594
URI: http://hdl.handle.net/10138/321415
Abstract: We have studied dark-adaptation at three levels in the eyes of the crustaceanMysis relictaover 2-3 weeks after exposing initially dark-adapted animals to strong white light: regeneration of 11-cisretinal through the retinoid cycle (by HPLC), restoration of native rhodopsin in photoreceptor membranes (by MSP), and recovery of eye photosensitivity (by ERG). We compare two model populations ("Sea", S-p, and "Lake", L-p) 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 both populations. The only significant L-p/S(p)difference in the retinoid cycle was that L(p)had much higher levels of retinol, both basal and light-released. In S-p, rhodopsin restoration and eye photoresponse recovery parallelled 11-cisretinal regeneration. In L-p, however, even after 3 weeks only ca. 25% of the rhabdoms studied had incorporated new rhodopsin, and eye photosensitivity showed only incipient recovery from severe depression. The absorbance spectra of the majority of the L(p)rhabdoms stayed constant around 490-500 nm, consistent with metarhodopsin II dominance. We conclude that sensitivity recovery of S(p)eyes was rate-limited by the regeneration of 11-cisretinal, whilst that of L(p)eyes was limited by inertia in photoreceptor membrane turnover.
Subject: 1184 Genetics, developmental biology, physiology
Vision · Rhabdomeric photoreceptor · Visual cycle · Crustacea · Baltic Sea
Vision
Rhabdomeric photoreceptor
Visual cycle
Crustacea
Baltic Sea
VISUAL PIGMENT
SPECTRAL SENSITIVITY
CYCLE
CRUSTACEA
VERTEBRATE
LOBSTER
VISION
PHOTORECEPTORS
ISOMERIZATION
ENVIRONMENTS
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