Difference in dynamic properties of photoreceptors in a butterfly, Papilio xuthus: possible segregation of motion and color processing

Kawasaki, Masashi; Kinoshita, Michiyo; Weckström, Matti; Arikawa, Kentaro

doi:10.1007/s00359-015-1039-y

Cited by 11 publications

(11 citation statements)

References 44 publications

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“…the response to a specific wavelength without further processing could be the origin of color vision while enhanced color vision might have evolved by increased connectivity within and between the different neuropil structures and central brain areas. For instance, in insects like butterflies and dragonflies, color vision involves additional processing in the lamina, where large monopolar cells exhibit spectral sensitivity [62,63,64,65]. …”

Section: Color Vision In Different Insectsmentioning

confidence: 99%

Retinal perception and ecological significance of color vision in insects

Lebhardt

Desplan

2017

Current Opinion in Insect Science

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Color vision relies on the ability to discriminate different wavelengths and is often improved in insects that inhabit well-lit, spectrally rich environments. Although the Opsin proteins themselves are sensitive to specific wavelength ranges, other factors can alter and further restrict the sensitivity of photoreceptors to allow for finer color discrimination and thereby more informed decisions while interacting with the environment. The ability to discriminate colors differs between insects that exhibit different life styles, between female and male eyes of the same species, and between regions of the same eye, depending on the requirements of intraspecific communication and ecological demands.

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Section: Color Vision In Different Insectsmentioning

confidence: 99%

Retinal perception and ecological significance of color vision in insects

Lebhardt

Desplan

2017

Current Opinion in Insect Science

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“…Third, the gain of the frequency–response function in distal green receptors extends to higher frequencies than in others, indicating that they are the fastest (Kawasaki et al . ). Taken together, this evidence points to the distal green receptor system being well‐suited for high spatial resolution vision as well as motion detection (Stewart et al .…”

Section: Introduction: the Butterfly Retinamentioning

confidence: 97%

The eyes and vision of butterflies

Arikawa

2017

The Journal of Physiology

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Butterflies use colour vision when searching for flowers. Unlike the trichromatic retinas of humans (blue, green and red cones; plus rods) and honeybees (ultraviolet, blue and green photoreceptors), butterfly retinas typically have six or more photoreceptor classes with distinct spectral sensitivities. The eyes of the Japanese yellow swallowtail (Papilio xuthus) contain ultraviolet, violet, blue, green, red and broad-band receptors, with each ommatidium housing nine photoreceptor cells in one of three fixed combinations. The Papilio eye is thus a random patchwork of three types of spectrally heterogeneous ommatidia. To determine whether Papilio use all of their receptors to see colours, we measured their ability to discriminate monochromatic lights of slightly different wavelengths. We found that Papilio can detect differences as small as 1-2 nm in three wavelength regions, rivalling human performance. We then used mathematical modelling to infer which photoreceptors are involved in wavelength discrimination. Our simulation indicated that the Papilio vision is tetrachromatic, employing the ultraviolet, blue, green and red receptors. The random array of three ommatidial types is a common feature in butterflies. To address the question of how the spectrally complex eyes of butterflies evolved, we studied their developmental process. We have found that the development of butterfly eyes shares its molecular logic with that of Drosophila: the three-way stochastic expression pattern of the transcription factor Spineless determines the fate of ommatidia, creating the random array in Papilio.Kentaro Arikawa graduated from Jiyu-Gakuen College Tokyo (natural science) and Sophia University graduate school Tokyo, (behavioural biology). As a first year graduate student, he found butterflies detect light by their genitals, and analysed the mechanism and function of this unique photoreceptive system for his PhD study. After being a biology professor at Yokohama City University for more than 20 years, he moved to SOKENDAI in 2006. He also served as a visiting fellow at the Australian National University (neurobiology), a research student at Mitsubishi-Kasei Institute of Life Science, a research fellow at NIH (visual science) and a researcher at JST-PRESTO.This review was presented at the symposium "Phototransduction and synaptic transmission" which took place at the Phototransduction UK workshop, Sheffield, 31 August -2 September 2016. C, head of a Spineless-knockout adult. The antennae did not extend (black arrowhead), and the spectral organization of the compound eye was modified as well.Abbreviations Cas9, CRISPR-associated protein-9 nuclease; CRISPR, clustered regularly interspaced short palindromic

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“…The LEDs could also be connected to analogue LED drivers if white-noise stimulation1032 is desired. Another attractive option for wide field stimulation33 would be to couple the LED synthesiser to a digital mirror device (DMD) projector.…”

Section: Discussionmentioning

confidence: 99%

A fast multispectral light synthesiser based on LEDs and a diffraction grating

Belušič

Ilić

Meglič

et al. 2016

Sci Rep

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Optical experiments often require fast-switching light sources with adjustable bandwidths and intensities. We constructed a wavelength combiner based on a reflective planar diffraction grating and light emitting diodes with emission peaks from 350 to 630 nm that were positioned at the angles corresponding to the first diffraction order of the reversed beam. The combined output beam was launched into a fibre. The spacing between 22 equally wide spectral bands was about 15 nm. The time resolution of the pulse-width modulation drivers was 1 ms. The source was validated with a fast intracellular measurement of the spectral sensitivity of blowfly photoreceptors. In hyperspectral imaging of Xenopus skin circulation, the wavelength resolution was adequate to resolve haemoglobin absorption spectra. The device contains no moving parts, has low stray light and is intrinsically capable of multi-band output. Possible applications include visual physiology, biomedical optics, microscopy and spectroscopy.

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Difference in dynamic properties of photoreceptors in a butterfly, Papilio xuthus: possible segregation of motion and color processing

Cited by 11 publications

References 44 publications

Retinal perception and ecological significance of color vision in insects

Retinal perception and ecological significance of color vision in insects

The eyes and vision of butterflies

A fast multispectral light synthesiser based on LEDs and a diffraction grating

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