...Nicolas Nagloo; Jessica K. Mountford; Ben J. Gundry; Nathan S. Hart; Wayne I. L. Davies; Shaun P. Collin; Jan M. Hemmi ABSTRACT Despite lizards using a wide range of colour signals, the limited variation in photoreceptor spectral sensitivities across lizards suggests only weak selection for species...

... ocelli and a pair of compound eyes, maximally sensitive to green light. The ommatidia contain a tiered, fused rhabdom, consisting of the rhabdomeres of 9–12 photoreceptor cells with sensitivity peak wavelengths at 356, 413, 480 and 530 nm. The photoreceptors in a large dorsal rim area have straight...

.... Here we show that stemmata contain two photoreceptor types, distinguished by the expression of different rhodopsins. The rhodopsin Aaop3 (GPROP3) is expressed in the majority of the larval photoreceptors. There are two small clusters of photoreceptors located within the satellite and central stemmata...

...Shyh-Chi Chen; Chengfeng Xiao; Nikolaus F. Troje; R. Meldrum Robertson; Craig W. Hawryshyn ABSTRACT Non-visual photoreceptors with diverse photopigments allow organisms to adapt to changing light conditions. Whereas visual photoreceptors are involved in image formation, non-visual photoreceptors...

...Barbara-Anne Battelle; Karen E. Kempler; Alexander K. Parker; Cristina D. Gaddie SUMMARY Dark and light adaptation in photoreceptors involve multiple processes including those that change protein concentrations at photosensitive membranes. Light- and dark-adaptive changes in protein levels...

...Janusz Borycz; Jolanta A. Borycz; Tara N. Edwards; Gabrielle L. Boulianne; Ian A. Meinertzhagen SUMMARY Flies recycle the photoreceptor neurotransmitter histamine by conjugating it to β-alanine to form β-alanyl-histamine (carcinine). The conjugation is regulated by Ebony, while Tan hydrolyses...

... © The Company of Biologists Limited 1995 Manduca sexta Sphingidae photoreceptors insect vision ultraviolet vision pollination The ‘color vision’ of insects has been widely studied in Hymenoptera ( Peitsch et al . 1992 ; Menzel and Shmida, 1993 ; Chittka et al . 1994...

...Ricardo Mondragón; Eugenio Frixione ABSTRACT Lidocaine, at concentrations equal to or lower than those that inhibit fast axoplasmic transport, was found to interfere with the dark-adapting migration of the screening pigments along crayfish photoreceptors and within the cells of the frog retinal...

...Eugenio Frixione; Jorge HernÁndez ABSTRACT The possibility that serotonin might play a role in the modulation of screening pigment position in crayfish photoreceptors was explored through experiments with isolated eyes and a membrane fraction from retinal homogenates. In the isolated eye serotonin...

...R. Menzel; E. Steinmann; J. De Souza; W. Backhaus ABSTRACT The spectral sensitivity of single photoreceptors of Osmia rufa was determined by a fast voltage-clamp technique. Three receptor types were found whose spectral sensitivity functions followed a rhodopsin-like photopigment absorption...

...Jonathon Howard ABSTRACT Upon bright illumination, pigment granules in the photoreceptors of the fly compound eye migrate transversely toward the rhabdomeres ( Kirschfeld & Franceschini, 1969 ). The granules absorb light passing down the rhabdomeric light guide, thereby reducing the light...