Nucleotide Fluctuation Analysis of Dim-Light Vision Rhodopsin Gene and mRNA Sequences in Vertebrates

2010 ◽  
Author(s):  
Todd Holden ◽  
Ni. Gadura ◽  
E. Cheung ◽  
J. Rada ◽  
P. Schneider ◽  
...  
Keyword(s):  
Fluctuation Analysis ◽  
Rhodopsin Gene ◽  
Dim Light ◽  
Dim Light Vision

Dim light vision of Squilla mantis L

1963 ◽  
Vol 205 (5) ◽  
pp. 927-940 ◽  
Author(s):  
H. Schiff
Keyword(s):  
Light Intensity ◽  
Mediterranean Sea ◽  
Environmental Conditions ◽  
Green Fluorescence ◽  
Fiber Analysis ◽  
Near Ultraviolet ◽  
Intensity Changes ◽  
Dim Light ◽  
Dim Light Vision ◽  
Shape And Size

The anatomy of the eye of Squilla mantis and the geometrical optics derived from it are briefly described. The shape and size of the electroretinogram (ERG) are dependent on a) position where it is picked up, b) the light intensity, and c) the change of intensity. Single-fiber analysis confirms the results obtained by the anatomy and the ERG of the eye. Frequency of response of a single secondary fiber to intensity changes of light is proportional to the derivate dI/dt ( I = intensity; t = time). The Squilla sees a moving object as the sum of the intensity changes caused by that object, varied in time and space. The eyes have a maximum of sensitivity for light of 535–555 mµ wavelength, and a second maximum in the near ultraviolet light, the latter partly seen as green fluorescence due to an eye pigment. Anatomy, physiology, and the environmental conditions have been combined to explain the vision of this animal, adapted to his life in the blue-violet twilight of the deeper Mediterranean sea.

The molecular origin and evolution of dim-light vision in mammals

Evolution ◽  
2015 ◽  
Vol 69 (11) ◽  
pp. 2995-3003 ◽  
Author(s):  
Constanze Bickelmann ◽  
James M. Morrow ◽  
Jing Du ◽  
Ryan K. Schott ◽  
Ilke van Hazel ◽  
...  
Keyword(s):  
Origin And Evolution ◽  
Molecular Origin ◽  
Dim Light ◽  
Dim Light Vision

scholarly journals A Cambrian origin for vertebrate rods

eLife ◽  
2015 ◽  
Vol 4 ◽  
Author(s):  
Sabrina Asteriti ◽  
Sten Grillner ◽  
Lorenzo Cangiano
Keyword(s):  
Common Ancestor ◽  
Selective Pressure ◽  
Single Photons ◽  
Last Common Ancestor ◽  
Rod Photoreceptor ◽  
Multiple Parameters ◽  
Retinal Photoreceptors ◽  
Functional Features ◽  
Dim Light ◽  
Dim Light Vision

Vertebrates acquired dim-light vision when an ancestral cone evolved into the rod photoreceptor at an unknown stage preceding the last common ancestor of extant jawed vertebrates (∼420 million years ago Ma). The jawless lampreys provide a unique opportunity to constrain the timing of this advance, as their line diverged ∼505 Ma and later displayed high-morphological stability. We recorded with patch electrodes the inner segment photovoltages and with suction electrodes the outer segment photocurrents of Lampetra fluviatilis retinal photoreceptors. Several key functional features of jawed vertebrate rods are present in their phylogenetically homologous photoreceptors in lamprey: crucially, the efficient amplification of the effect of single photons, measured by multiple parameters, and the flow of rod signals into cones. These results make convergent evolution in the jawless and jawed vertebrate lines unlikely and indicate an early origin of rods, implying strong selective pressure toward dim-light vision in Cambrian ecosystems.

Retinal adaptation to dim light vision in spectacled caimans ( Caiman crocodilus fuscus ): Analysis of retinal ultrastructure

2018 ◽  
Vol 173 ◽  
pp. 160-178 ◽  
Author(s):  
Anett Karl ◽  
Silke Agte ◽  
Astrid Zayas-Santiago ◽  
Felix N. Makarov ◽  
Yomarie Rivera ◽  
...  
Keyword(s):  
Caiman Crocodilus ◽  
Retinal Adaptation ◽  
Dim Light ◽  
Dim Light Vision

scholarly journals Molecular evidence for dim-light vision in the last common ancestor of the vertebrates

2006 ◽  
Vol 16 (9) ◽  
pp. R318-R319 ◽  
Author(s):  
Davide Pisani ◽  
Samantha M. Mohun ◽  
Simon R. Harris ◽  
James O. McInerney ◽  
Mark Wilkinson
Keyword(s):  
Common Ancestor ◽  
Molecular Evidence ◽  
Last Common Ancestor ◽  
Dim Light ◽  
Dim Light Vision

scholarly journals Ocellar adaptations for dim light vision in a nocturnal bee

2011 ◽  
Vol 214 (8) ◽  
pp. 1283-1293 ◽  
Author(s):  
R. P. Berry ◽  
W. T. Wcislo ◽  
E. J. Warrant
Keyword(s):  
Dim Light ◽  
Dim Light Vision

scholarly journals Sleep Network Deterioration as a Function of Dim-Light-At-Night Exposure Duration in a Mouse Model

2020 ◽  
Vol 2 (3) ◽  
pp. 308-324
Author(s):  
Maria Panagiotou ◽  
Jos H.T. Rohling ◽  
Tom Deboer
Keyword(s):  
Exposure Duration ◽  
Sleep Disturbances ◽  
Regulatory System ◽  
Well Being ◽  
Sleep Eeg ◽  
Fluctuation Analysis ◽  
Light At Night ◽  
Compensatory Mechanisms ◽  
Activity Data ◽  
Dim Light

Artificial light, despite its widespread and valuable use, has been associated with deterioration of health and well-being, including altered circadian timing and sleep disturbances, particularly in nocturnal exposure. Recent findings from our lab reveal significant sleep and sleep electroencephalogram (EEG) changes owing to three months exposure to dim-light-at-night (DLAN). Aiming to further explore the detrimental effects of DLAN exposure, in the present study, we continuously recorded sleep EEG and the electromyogram for baseline 24-h and following 6-h sleep deprivation in a varied DLAN duration scheme. C57BL/6J mice were exposed to a 12:12 h light:DLAN cycle (75lux:5lux) vs. a 12:12 h light:dark cycle (75lux:0lux) for one day, one week, and one month. Our results show that sleep was already affected by a mere day of DLAN exposure with additional complications emerging with increasing DLAN exposure duration, such as the gradual delay of the daily 24-h vigilance state rhythms. We conducted detrended fluctuation analysis (DFA) on the locomotor activity data following 1-month and 3-month DLAN exposure, and a significantly less healthy rest-activity pattern, based on the decreased alpha values, was found in both conditions compared to the control light-dark. Taking into account the behavioral, sleep and the sleep EEG parameters, our data suggest that DLAN exposure, even in the shortest duration, induces deleterious effects; nevertheless, potential compensatory mechanisms render the organism partly adjustable and able to cope. We think that, for this reason, our data do not always depict linear divergence among groups, as compared with control conditions. Chronic DLAN exposure impacts the sleep regulatory system, but also brain integrity, diminishing its adaptability and reactivity, especially apparent in the sleep EEG alterations and particular low alpha values following DFA.

scholarly journals Functional trade-offs and environmental variation shaped ancient trajectories in the evolution of dim-light vision

eLife ◽  
2018 ◽  
Vol 7 ◽  
Author(s):  
Gianni M Castiglione ◽  
Belinda SW Chang
Keyword(s):  
Protein Stability ◽  
Visual Pigment ◽  
Environmental Variation ◽  
Epistatic Interactions ◽  
Epistatic Effects ◽  
Trade Offs ◽  
Evolutionary Trajectories ◽  
Dim Light ◽  
Multicellular Organisms ◽  
Dim Light Vision

Trade-offs between protein stability and activity can restrict access to evolutionary trajectories, but widespread epistasis may facilitate indirect routes to adaptation. This may be enhanced by natural environmental variation, but in multicellular organisms this process is poorly understood. We investigated a paradoxical trajectory taken during the evolution of tetrapod dim-light vision, where in the rod visual pigment rhodopsin, E122 was fixed 350 million years ago, a residue associated with increased active-state (MII) stability but greatly diminished rod photosensitivity. Here, we demonstrate that high MII stability could have likely evolved without E122, but instead, selection appears to have entrenched E122 in tetrapods via epistatic interactions with nearby coevolving sites. In fishes by contrast, selection may have exploited these epistatic effects to explore alternative trajectories, but via indirect routes with low MII stability. Our results suggest that within tetrapods, E122 and high MII stability cannot be sacrificed—not even for improvements to rod photosensitivity.

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