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Keywords: Photoreceptor
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Journal Articles
J Exp Biol (2022) 225 (6): jeb243699.
Published: 28 March 2022
... colour channels they possess may underlie a different method of colour processing. We investigated one hypothesis in which the photoreceptors are proposed to act as individual wave-band detectors, interpreting colour as a parallel pattern of photoreceptor activation, rather than a ratiometric comparison...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (15): jeb222679.
Published: 30 July 2021
... photoreceptors and circuits can such measures guide modelling of natural vision in different species and illuminate functional and evolutionary trade-offs. Temporal vision research would benefit from bridging traditions that speak different languages. Towards that goal, I here review studies from the fields...
Journal Articles
J Exp Biol (2020) 223 (11): jeb215368.
Published: 29 May 2020
... system. These include variations in the topography, spectral sensitivity and density of retinal photoreceptors, and changes in the eye's gross anatomy and spectral transmission characteristics. We have characterised visual spectral sensitivity in the murid rodent Rhabdomys pumilio (the four-striped grass...
Journal Articles
J Exp Biol (2020) 223 (8): jeb193334.
Published: 23 April 2020
..., seasonally or ontogenetically. To survive in these variable light habitats, fish visual systems have evolved a suite of mechanisms that modulate spectral sensitivities on a range of timescales. These mechanisms include: (1) optical media that filter light, (2) variations in photoreceptor type and size...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (3): jeb217703.
Published: 3 February 2020
... and polarization properties of the photoreceptors of a migrating nymphalid, Parantica sita . Our findings reveal three spectral classes of photoreceptors including ultraviolet, blue and green receptors. The green receptor class contains three subclasses, which are broad, narrow and double-peaking green receptors...
Journal Articles
In collection:
J Exp Biol (2019) 222 (1): jeb191957.
Published: 1 January 2019
... of motion vision in P . xuthus to incorporate these polarization findings, and conclude that the photoreceptors likely to form the basis for the putative monopolatic polarization detector are R3 and R4, which respond maximally to horizontally polarized green light. R5–R8, we propose, form a polarization...
Includes: Supplementary data
Journal Articles
Journal Articles
J Exp Biol (2017) 220 (11): 1997–2004.
Published: 1 June 2017
...David Wilby; Nicholas W. Roberts ABSTRACT Oil droplets are spherical organelles found in the cone photoreceptors of vertebrates. They are generally assumed to focus incident light into the outer segment, and thereby improve light catch because of the droplets' spherical lens-like shape. However...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (23): 4262–4268.
Published: 1 December 2014
...Anna Honkanen; Jouni Takalo; Kyösti Heimonen; Mikko Vähäsöyrinki; Matti Weckström Reliable vision in dim light depends on the efficient capture of photons. Moreover, visually guided behaviour requires reliable signals from the photoreceptors to generate appropriate motor reactions. Here, we show...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (6): 1003–1008.
Published: 15 March 2014
...Xiaobang Hu; Matthew T. Leming; Michelle A. Whaley; Joseph E. O'Tousa Differential rhodopsin gene expression within specialized R7 photoreceptor cells divides the retinas of Aedes aegypti and Anopheles gambiae mosquitoes into distinct domains. The two species express the rhodopsin orthologs Aaop8...
Journal Articles
J Exp Biol (2013) 216 (18): 3414–3421.
Published: 15 September 2013
... sensitivities of the photoreceptors are rather simple, and peak in the ultraviolet, blue and green wavelength regions. The ommatidia have neither perirhabdomal nor fluorescent pigments, which modulate photoreceptor spectral sensitivities in a number of other butterfly species. These features are primitive...
Journal Articles
J Exp Biol (2013) 216 (11): 2081–2088.
Published: 1 June 2013
...Gregor Belušič; Primož Pirih; Doekele G. Stavenga SUMMARY The owlfly Libelloides macaronius (Insecta: Neuroptera) has large bipartite eyes of the superposition type. The spatial resolution and sensitivity of the photoreceptor array in the dorsofrontal eye part was studied with optical...
Journal Articles
Journal Articles
J Exp Biol (2012) 215 (15): 2684–2695.
Published: 1 August 2012
..., we studied the developmental trajectory of the photopic visual process in the Nile tilapia. We examined ontogenetic changes in lens transmission, photoreceptor sensitivity and post-receptoral sensitivity, and used these to estimate changes in cone pigment frequency and retinal circuitry. We observed...
Journal Articles
J Exp Biol (2011) 214 (13): 2248–2257.
Published: 1 July 2011
...Jason C. Raine; Allison B. Coffin; Craig W. Hawryshyn SUMMARY Thyroid hormones (THs) play a vital role in vertebrate neural development, and, together with the beta isoform of the thyroid hormone receptor (TRβ), the development and differentiation of cone photoreceptors in the vertebrate retina...
Journal Articles
J Exp Biol (2011) 214 (4): 546–550.
Published: 15 February 2011
... different types of photoreceptors with absorbance maxima in the mid-range of the spectrum, at 480 nm and 520 nm and in the UV at 360 nm. Based on these physiological data colour vision might be possible. In the present study, the ability to discriminate coloured moving stimuli from grey backgrounds...
Journal Articles
J Exp Biol (2010) 213 (24): 4240–4248.
Published: 15 December 2010
...-sensitive opsins, whereas UpRh3 is similar to other arthropod UV-sensitive opsins. All three opsins are expressed in each ommatidium, in an opsin-specific pattern. UpRh3 is present only in the R8 photoreceptor cell, whereas UpRh1 and UpRh2 are present in the R1-7 cells, with UpRh1 expression restricted...
Journal Articles
J Exp Biol (2010) 213 (23): 4023–4029.
Published: 1 December 2010
...-expression of the opsins of the UV- and B-absorbing type in a subset of photoreceptors, and subfunctionalization of long-wavelength receptors in the distal tier as a result of differential expression of the PgL2 and PgL3 mRNAs. Interestingly, butterflies from the closely related genus Papilio (Papilionidae...
Journal Articles
J Exp Biol (2010) 213 (15): 2589–2601.
Published: 1 August 2010
...C. Katti; K. Kempler; M. L. Porter; A. Legg; R. Gonzalez; E. Garcia-Rivera; D. Dugger; B.-A. Battelle SUMMARY A long-standing concept in vision science has held that a single photoreceptor expresses a single type of opsin, the protein component of visual pigment. However, the number of examples...
Includes: Supplementary data
Journal Articles