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Performance of blue- and green-sensitive photoreceptors of the cricket Gryllus bimaculatus

Frolov, R. V.; Immonen, Esa-Ville LU and Weckstrom, M. (2014) In Journal of Comparative Physiology A 200. p.209-219
Abstract
The compound eye of the cricket Gryllus bimaculatus contains a specialized dorsal rim area (DRA) populated by distinct blue-sensitive photoreceptors responsible for perception of polarized light. The rest of the eye is dominated by green-sensitive photoreceptors. Using patch clamp we studied dissociated ommatidia of nocturnal adults and diurnal eight-instar nymphs with the goals (1) of characterizing the biophysical properties of cricket photoreceptors in general and (2) describing the functionally dissimilar blue- and green-sensitive photoreceptors in terms of voltage-gated channel composition and signal coding. Despite different lifestyles, adult and nymph photoreceptors were indistinguishable. No significant circadian changes were... (More)
The compound eye of the cricket Gryllus bimaculatus contains a specialized dorsal rim area (DRA) populated by distinct blue-sensitive photoreceptors responsible for perception of polarized light. The rest of the eye is dominated by green-sensitive photoreceptors. Using patch clamp we studied dissociated ommatidia of nocturnal adults and diurnal eight-instar nymphs with the goals (1) of characterizing the biophysical properties of cricket photoreceptors in general and (2) describing the functionally dissimilar blue- and green-sensitive photoreceptors in terms of voltage-gated channel composition and signal coding. Despite different lifestyles, adult and nymph photoreceptors were indistinguishable. No significant circadian changes were observed in K(+) currents. In contrast, prominent differences were seen between blue- and green-sensitive photoreceptors. The former were characterized by relatively low absolute sensitivity, high input resistance, slow quantum bumps with long latencies, small light-induced and K(+) currents and low steady-state depolarization. Information rate, a measure of photoreceptor performance calculated from voltage responses to bandwidth-limited white noise-modulated light contrast, was 87 +/- 8 bits s(-)(1) in green-sensitive photoreceptors vs. 59 +/- 14 bits s(-)(1) in blue-sensitive photoreceptors, implying a limited role of DRA in the perception of visual contrasts. In addition, evidence of electrical coupling between photoreceptors is presented. (Less)
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author
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Contribution to journal
publication status
published
subject
keywords
Invertebrate/*physiology, Potassium/metabolism, Reaction Time, Spectrum Analysis, Photoreceptor Cells, Photic Stimulation, Patch-Clamp Techniques, Membrane Potentials/physiology, Light, Gryllidae/*anatomy & histology/physiology, Electric Stimulation, Color Perception/*physiology, *Color, Animals, Biophysics
in
Journal of Comparative Physiology A
volume
200
pages
209 - 219
publisher
Springer
external identifiers
  • scopus:84894323699
ISSN
1432-1351
DOI
10.1007/s00359-013-0879-6
language
English
LU publication?
no
id
7e0e96aa-9fc7-4809-9de7-c7542458a93d (old id 5431760)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/24398538
date added to LUP
2015-05-25 14:56:23
date last changed
2017-08-27 03:43:32
@article{7e0e96aa-9fc7-4809-9de7-c7542458a93d,
  abstract     = {The compound eye of the cricket Gryllus bimaculatus contains a specialized dorsal rim area (DRA) populated by distinct blue-sensitive photoreceptors responsible for perception of polarized light. The rest of the eye is dominated by green-sensitive photoreceptors. Using patch clamp we studied dissociated ommatidia of nocturnal adults and diurnal eight-instar nymphs with the goals (1) of characterizing the biophysical properties of cricket photoreceptors in general and (2) describing the functionally dissimilar blue- and green-sensitive photoreceptors in terms of voltage-gated channel composition and signal coding. Despite different lifestyles, adult and nymph photoreceptors were indistinguishable. No significant circadian changes were observed in K(+) currents. In contrast, prominent differences were seen between blue- and green-sensitive photoreceptors. The former were characterized by relatively low absolute sensitivity, high input resistance, slow quantum bumps with long latencies, small light-induced and K(+) currents and low steady-state depolarization. Information rate, a measure of photoreceptor performance calculated from voltage responses to bandwidth-limited white noise-modulated light contrast, was 87 +/- 8 bits s(-)(1) in green-sensitive photoreceptors vs. 59 +/- 14 bits s(-)(1) in blue-sensitive photoreceptors, implying a limited role of DRA in the perception of visual contrasts. In addition, evidence of electrical coupling between photoreceptors is presented.},
  author       = {Frolov, R. V. and Immonen, Esa-Ville and Weckstrom, M.},
  issn         = {1432-1351},
  keyword      = {Invertebrate/*physiology,Potassium/metabolism,Reaction Time,Spectrum Analysis,Photoreceptor Cells,Photic Stimulation,Patch-Clamp Techniques,Membrane Potentials/physiology,Light,Gryllidae/*anatomy & histology/physiology,Electric Stimulation,Color Perception/*physiology,*Color,Animals,Biophysics},
  language     = {eng},
  pages        = {209--219},
  publisher    = {Springer},
  series       = {Journal of Comparative Physiology A},
  title        = {Performance of blue- and green-sensitive photoreceptors of the cricket Gryllus bimaculatus},
  url          = {http://dx.doi.org/10.1007/s00359-013-0879-6},
  volume       = {200},
  year         = {2014},
}