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

Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
Masashi KawasakiKentaro Arikawa

Abstract

The eyes of the Japanese yellow swallowtail butterfly, Papilio xuthus, contain six spectral classes of photoreceptors, each sensitive either in the ultraviolet, violet, blue, green, red or broadband wavelength regions. The green-sensitive receptors can be divided into two subtypes, distal and proximal. Previous behavioral and anatomical studies have indicated that the distal subtype appears to be involved in motion vision, while the proximal subtype is important for color vision. Here, we studied the dynamic properties of Papilio photoreceptors using light stimulation with randomly modulated intensity and light pulses. Frequency response (gain) of all photoreceptor classes shared a general profile-a broad peak around 10 Hz with a declining slope towards higher frequency range. At 100 Hz, the mean relative gain of the distal green receptors was significantly larger than any other receptor classes, indicating that they are the fastest. Photoreceptor activities under dim light were higher in the ultraviolet and violet receptors, suggesting higher transduction sensitivities. Responses to pulse stimuli also distinguished the green receptors from others by their shorter response latencies. We thus concluded that the distal green rece...Continue Reading

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Citations

Aug 26, 2016·Scientific Reports·Gregor BelušičPrimož Pirih
Oct 11, 2017·Integrative and Comparative Biology·Finlay J StewartKentaro Arikawa
Aug 5, 2017·Science·Innes C CuthillTim Caro
Jan 4, 2019·The Journal of Experimental Biology·Finlay J StewartKentaro Arikawa
Mar 19, 2019·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Anna Lisa Stöckl, Almut Kelber

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