ArticleJournal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology2020
Chromatic information processing in the first optic ganglion of the butterfly Papilio xuthus.
Article in Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed, 36 citations in OpenAlex.
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- Motion-sensitive neurons activated by chromatic contrast in a butterfly visual system.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Article
- Opponent processing in the retinal mosaic of nymphalid butterflies.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Article
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- Multiple Mechanisms of Photoreceptor Spectral Tuning in Heliconius Butterflies.Molecular biology and evolution · 2022Article
- Red-green opponency in the long visual fibre photoreceptors of brushfoot butterflies (Nymphalidae).Proceedings. Biological sciences · 2021Article
- Visual circuits in arthropod brains.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2020Article
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Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The butterfly Papilio xuthus has acute tetrachromatic color vision. Its eyes are furnished with eight spectral classes of photoreceptors, situated in three types of ommatidia, randomly distributed in the retinal mosaic. Here, we investigated early chromatic information processing by recording spectral, angular, and polarization sensitivities of photoreceptors and lamina monopolar cells (LMCs). We identified three spectral classes of LMCs whose spectral sensitivities corresponded to weighted linear sums of the spectral sensitivities of the photoreceptors present in the three ommatidial types. In ~ 25% of the photoreceptor axons, the spectral sensitivities differed from those recorded at the photoreceptor cell bodies. These axons showed spectral opponency, most likely mediated by chloride ion currents through histaminergic interphotoreceptor synapses. The opponency was most prominent in the processes of the long visual fibers in the medulla. We recalculated the wavelength discrimination function using the noise-limited opponency model to reflect the new spectral sensitivity data and found that it matched well with the behaviorally determined function. Our results reveal opponency at the first stage of Papilio's visual system, indicating that spectral information is preprocessed with signals from photoreceptors within each ommatidium in the lamina, before being conveyed downstream by the long visual fibers and the LMCs.
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