Glia Regulate the Timing of Photoreceptor Differentiation in the Drosophila Visual System. [PDF]
GliaActivation of EGFR signaling in sub‐retinal glia is required for timing photoreceptor differentiation in the Drosophila visual system. ILP3 and ILP6 are downstream targets of the EGFR pathway in sub‐retinal glia, which activate insulin signaling in photoreceptor precursor cells in the developing retina.
Ren Q, Chang WT, Rao Y.
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Imprecision in Vision: Lessons From Neural Circuits in the Fly. [PDF]
BioessaysVisual systems are considered regular, retinotopic structures. Here, we summarize findings, including evidence from recent connectomes, that demonstrate cellular and synaptic heterogeneity in the Drosophila visual system —from regional specialization and stochastic photoreceptor patterns to heterogeneous synaptic connectivity.
Wernet MF, Silies M.
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Broad Epigenetic Shifts in the Aging Drosophila Retina Contribute to Its Altered Diurnal Rhythmic Transcriptome. [PDF]
Aging CellAs flies age, their photoreceptor transcriptome is extensively reprogrammed, with about 40% of genes undergoing rhythmic expression changes. These transcriptional changes are accompanied by altered RNA Polymerase II occupancy, chromatin accessibility, and H3K4 methylation, without major changes to the occupancy of the core clock transcription factors ...
McGovern SE +4 more
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Photoreceptor spectral sensitivity in the bumblebee, Bombus impatiens (Hymenoptera: Apidae). [PDF]
, 2010 The bumblebee Bombus impatiens is increasingly used as a model in comparative studies of colour vision, or in behavioural studies relying on perceptual discrimination of colour.
Skorupski Peter +5 more
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Coexpression of Two Visual Pigments in a Photoreceptor Causes an Abnormally Broad Spectral Sensitivity in the Eye of the Butterfly Papilio xuthus [PDF]
, 2003 The compound eye of the butterfly Papilio xuthus consists of three different types of ommatidia, each containing nine photoreceptor cells (R1–R9). We have found previously that the R5–R8 photoreceptors of type II ommatidia coexpress two different mRNAs ...
Doekele G. Stavenga +12 more
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Waveguide theory applied to optically measured angular sensitivities of fly photoreceptors [PDF]
, 1984 Farfield radiation patterns of single ommatidia of the fly, Calliphora erythrocephala, have been photographed. Clear radiation patterns of the first and the second waveguide mode have been observed. According to theory, the shape of the (optical) angular
VANHATEREN, JH, Hateren, J.H. van,
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Wiring a periscope--ocelli, retinula axons, visual neuropils and the ancestrality of sea spiders. [PDF]
, 2012 The Pycnogonida or sea spiders are cryptic, eight-legged arthropods with four median ocelli in a 'periscope' or eye tubercle. In older attempts at reconstructing phylogeny they were Arthropoda incertae sedis, but recent molecular trees placed them as the
Roland R Melzer +8 more
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, 2011 Colour vision depends on comparison of signals from photoreceptors with different spectral sensitivities. However, response properties of photoreceptor cells may differ in ways other than spectral tuning. In insects, for example, broadband photoreceptors,
Skorupski, P +3 more
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Monoaminergic modulation of photoreception in ascidian:evidence for a proto-hypothalamo-retinal territory [PDF]
, 2012 The retina of craniates/vertebrates has been proposed to derive from a photoreceptor prosencephalic territory in ancestral chordates, but the evolutionary origin of the different cell types making the retina is disputed.
Kusakabe, Takehiro G +18 more
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, 2005 SummaryAnimal photoreceptor cells can be classified into two distinct types, depending on whether the photopigment is borne on the membrane of a modified cilium (ciliary type) or apical microvilli (rhabdomeric type) [1].
Tsukamoto, Hisao +9 more
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