ArticleBMC neuroscience2012
Cellular elements for seeing in the dark: voltage-dependent conductances in cockroach photoreceptors.
Article in BMC neuroscience, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed, 25 citations in OpenAlex.
- Spontaneous spiking in photoreceptors of Periplaneta americana.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2026Article
- Article
- Electrophysiological adaptations of insect photoreceptors and their elementary responses to diurnal and nocturnal lifestyles.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2020Article
- Phenotypic plasticity inThe Journal of general physiology · 2018Article
- On the role of transient depolarization-activated KThe Journal of general physiology · 2018Article
- The role of ocelli in cockroach optomotor performance.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2018Article
- EAG channels expressed in microvillar photoreceptors are unsuited to diurnal vision.The Journal of physiology · 2017Article
- Insect photoreceptor adaptations to night vision.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2017Review
- The remarkable visual capacities of nocturnal insects: vision at the limits with small eyes and tiny brains.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2017Review
- Distinct roles of light-activated channels TRP and TRPL in photoreceptors ofThe Journal of general physiology · 2017Article
- Visual ecology and potassium conductances of insect photoreceptors.Journal of neurophysiology · 2016Article
- Frequency-selective transmission of graded signals in large monopolar neurons of blowfly Calliphora vicina compound eye.Journal of neurophysiology · 2016Article
- Performance of blue- and green-sensitive photoreceptors of the cricket Gryllus bimaculatus.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2014Article
- Elementary and macroscopic light-induced currents and their Ca(2+)-dependence in the photoreceptors of Periplaneta americana.Frontiers in physiology · 2014Article
- Membrane filtering properties of the bumblebee (Bombus terrestris) photoreceptors across three spectral classes.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2013Article
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe importance of voltage-dependent conductances in sensory information processing is well-established in insect photoreceptors. Here we present the characterization of electrical properties in photoreceptors of the cockroach (Periplaneta americana), a nocturnal insect with a visual system adapted for dim light.
resultsWhole-cell patch-clamped photoreceptors had high capacitances and input resistances, indicating large photosensitive rhabdomeres suitable for efficient photon capture and amplification of small photocurrents at low light levels. Two voltage-dependent potassium conductances were found in the photoreceptors: a delayed rectifier type (KDR) and a fast transient inactivating type (KA). Activation of KDR occurred during physiological voltage responses induced by light stimulation, whereas KA was nearly fully inactivated already at the dark resting potential. In addition, hyperpolarization of photoreceptors activated a small-amplitude inward-rectifying (IR) current mediated at least partially by chloride. Computer simulations showed that KDR shapes light responses by opposing the light-induced depolarization and speeding up the membrane time constant, whereas KA and IR have a negligible role in the majority of cells. However, larger KA conductances were found in smaller and rapidly adapting photoreceptors, where KA could have a functional role.
conclusionsThe relative expression of KA and KDR in cockroach photoreceptors was opposite to the previously hypothesized framework for dark-active insects, necessitating further comparative work on the conductances. In general, the varying deployment of stereotypical K+ conductances in insect photoreceptors highlights their functional flexibility in neural coding.
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