scholarly journals Spectral sensitivity in Onychophora (velvet worms) revealed by electroretinograms, phototactic behaviour and opsin gene expression

2015 ◽  
Vol 218 (6) ◽  
pp. 915-922 ◽  
Author(s):  
H. Beckmann ◽  
L. Hering ◽  
M. J. Henze ◽  
A. Kelber ◽  
P. A. Stevenson ◽  
...  
Keyword(s):  
Gene Expression ◽  
Spectral Sensitivity ◽  
Opsin Gene ◽  
Velvet Worms ◽  
Phototactic Behaviour

scholarly journals Mix and Match Color Vision: Tuning Spectral Sensitivity by Differential Opsin Gene Expression in Lake Malawi Cichlids

2005 ◽  
Vol 15 (19) ◽  
pp. 1734-1739 ◽  
Author(s):  
Juliet W.L. Parry ◽  
Karen L. Carleton ◽  
Tyrone Spady ◽  
Aba Carboo ◽  
David M. Hunt ◽  
...  
Keyword(s):  
Gene Expression ◽  
Color Vision ◽  
Spectral Sensitivity ◽  
Lake Malawi ◽  
Opsin Gene ◽  
Mix And Match

scholarly journals Intra-retinal variation of opsin gene expression in the guppy (Poecilia reticulata)

2011 ◽  
Vol 214 (19) ◽  
pp. 3248-3254 ◽  
Author(s):  
D. J. Rennison ◽  
G. L. Owens ◽  
W. T. Allison ◽  
J. S. Taylor
Keyword(s):  
Gene Expression ◽  
Poecilia Reticulata ◽  
Opsin Gene

scholarly journals Ontogenetic changes in photoreceptor opsin gene expression in coho salmon (Oncorhynchus kisutch, Walbaum)

2008 ◽  
Vol 211 (24) ◽  
pp. 3879-3888 ◽  
Author(s):  
S. E. Temple ◽  
K. M. Veldhoen ◽  
J. T. Phelan ◽  
N. J. Veldhoen ◽  
C. W. Hawryshyn
Keyword(s):  
Gene Expression ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Opsin Gene ◽  
Ontogenetic Changes

scholarly journals Genetic and plastic variation in opsin gene expression, light sensitivity, and female response to visual signals in the guppy

2018 ◽  
Vol 115 (48) ◽  
pp. 12247-12252 ◽  
Author(s):  
Yusuke Sakai ◽  
Shoji Kawamura ◽  
Masakado Kawata
Keyword(s):  
Gene Expression ◽  
Light Sensitivity ◽  
Visual Sensitivity ◽  
Visual Signals ◽  
Light Environment ◽  
Opsin Gene ◽  
Sensitivity Threshold ◽  
Male Body ◽  
Female Response ◽  
Visual Properties

According to the sensory drive model, variation in visual properties can lead to diverse female preferences, which in turn results in a range of male nuptial colors by way of sexual selection. However, the cause of variation in visual properties and the mechanism by which variation drives female response to visual signals remain unclear. Here, we demonstrate that both differences in the long-wavelength–sensitive 1 (LWS-1) opsin genotype and the light environment during rearing lead to variation in opsin gene expression. Opsin expression variation affects the visual sensitivity threshold to long wavelengths of light. Moreover, a behavioral assay using digitally modified video images showed that the expression of multiple opsin genes is positively correlated with the female responsiveness to images of males with luminous orange spots. The findings suggest that genetic polymorphisms and light environment in habitats induce variations in opsin gene expression levels. The variations may facilitate variations in visual sensitivity and female responsiveness to male body colors within and among populations.

Opsin gene expression during early and late phases of retinal degeneration in rds mice

1990 ◽  
Vol 51 (3) ◽  
pp. 257-267 ◽  
Author(s):  
Izhak Nir ◽  
Neeraj Agarwal ◽  
David S. Papermaster
Keyword(s):  
Gene Expression ◽  
Retinal Degeneration ◽  
Opsin Gene

scholarly journals Reduced opsin gene expression in a cave-dwelling fish

2009 ◽  
Vol 6 (1) ◽  
pp. 98-101 ◽  
Author(s):  
Michael Tobler ◽  
Seth W. Coleman ◽  
Brian D. Perkins ◽  
Gil G. Rosenthal
Keyword(s):  
Gene Expression ◽  
Visual Function ◽  
Opsin Gene ◽  
Regressive Evolution ◽  
Opsin Expression ◽  
Poecilia Mexicana ◽  
Evolutionary Step ◽  
Surface Dwelling ◽  
Blind Cave ◽  
Intense Research

Regressive evolution of structures associated with vision in cave-dwelling organisms is the focus of intense research. Most work has focused on differences between extreme visual phenotypes: sighted, surface animals and their completely blind, cave-dwelling counterparts. We suggest that troglodytic systems, comprising multiple populations that vary along a gradient of visual function, may prove critical in understanding the mechanisms underlying initial regression in visual pathways. Gene expression assays of natural and laboratory-reared populations of the Atlantic molly ( Poecilia mexicana ) revealed reduced opsin expression in cave-dwelling populations compared with surface-dwelling conspecifics. Our results suggest that the reduction in opsin expression in cave-dwelling populations is not phenotypically plastic but reflects a hardwired system not rescued by exposure to light during retinal ontogeny. Changes in opsin gene expression may consequently represent a first evolutionary step in the regression of eyes in cave organisms.

scholarly journals Parallel Evolution of Opsin Gene Expression in African Cichlid Fishes

2010 ◽  
Vol 27 (12) ◽  
pp. 2839-2854 ◽  
Author(s):  
K. E. O'Quin ◽  
C. M. Hofmann ◽  
H. A. Hofmann ◽  
K. L. Carleton
Keyword(s):  
Gene Expression ◽  
Parallel Evolution ◽  
Opsin Gene ◽  
Cichlid Fishes ◽  
African Cichlid
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