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insect chemosensory

Wenjing Wu, Zhiqiang Li, Shijun Zhang, Yunling Ke, Yahui Hou
BACKGROUND: Carbon dioxide (CO2) is a pervasive chemical stimulus that plays a critical role in insect life, eliciting behavioral and physiological responses across different species. High CO2 concentration is a major feature of termite nests, which may be used as a cue for locating their nests. Termites also survive under an elevated CO2 concentration. However, the mechanism by which elevated CO2 concentration influences gene expression in termites is poorly understood. METHODS: To gain a better understanding of the molecular basis involved in the adaptation to CO2 concentration, a transcriptome of Coptotermes formosanus Shiraki was constructed to assemble the reference genes, followed by comparative transcriptomic analyses across different CO2 concentration (0...
2016: PeerJ
Zhongzhen Wu, Jintian Lin, He Zhang, Xinnian Zeng
The oriental fruit fly, Bactrocera dorsalis (Diptera: Tephritidae), is one of the most destructive pests throughout tropical and subtropical regions in Asia. This insect displays remarkable changes during different developmental phases in olfactory behavior between sexually immature and mated adults. The olfactory behavioral changes provide clues to examine physiological and molecular bases of olfactory perception in this insect. We comparatively analyzed behavioral and neuronal responses of B. dorsalis adults to attractant semiochemicals, and the expression profiles of antenna chemosensory genes...
2016: Frontiers in Physiology
Cristina M Crava, Sukania Ramasamy, Lino Ometto, Gianfranco Anfora, Omar Rota-Stabelli
Chemosensory perception allows insects to interact with the environment by perceiving odorant or tastant molecules; genes encoding chemoreceptors are the molecular interface between the environment and the insect, and play a central role in mediating its chemosensory behavior. Here we explore how the evolution of these genes in the emerging pest Drosophila suzukii correlates with the peculiar ecology of this species. We annotated approximately 130 genes coding for gustatory receptors (GRs) and divergent ionotropic receptors (dIRs) in D...
October 19, 2016: G3: Genes—Genomes—Genetics
Stefan Dippel, Martin Kollmann, Georg Oberhofer, Alice Montino, Carolin Knoll, Milosz Krala, Karl-Heinz Rexer, Sergius Frank, Robert Kumpf, Joachim Schachtner, Ernst A Wimmer
BACKGROUND: The red flour beetle Tribolium castaneum is an emerging insect model organism representing the largest insect order, Coleoptera, which encompasses several serious agricultural and forest pests. Despite the ecological and economic importance of beetles, most insect olfaction studies have so far focused on dipteran, lepidopteran, or hymenopteran systems. RESULTS: Here, we present the first detailed morphological description of a coleopteran olfactory pathway in combination with genome-wide expression analysis of the relevant gene families involved in chemoreception...
October 17, 2016: BMC Biology
Long-Wa Zhang, Ke Kang, Shi-Chang Jiang, Ya-Nan Zhang, Tian-Tian Wang, Jing Zhang, Long Sun, Yun-Qiu Yang, Chang-Chun Huang, Li-Ya Jiang, De-Gui Ding
Hyphantria cunea (Drury) (Lepidoptera: Arctiidae) is an invasive insect pest which, in China, causes unprecedented damage and economic losses due to its extreme fecundity and wide host range, including forest and shade trees, and even crops. Compared to the better known lepidopteran species which use Type-I pheromones, little is known at the molecular level about the olfactory mechanisms of host location and mate choice in H. cunea, a species using Type-II lepidopteran pheromones. In the present study, the H...
2016: PloS One
Immacolata Iovinella, Liping Ban, Limei Song, Paolo Pelosi, Francesca Romana Dani
In arthropods, the large majority of studies on olfaction have been focused on insects, where most of the proteins involved have been identified. In particular, chemosensing in insects relies on two families of membrane receptors, olfactory/gustatory receptors (ORs/GRs) and ionotropic receptors (IRs), and two classes of soluble proteins, odorant-binding proteins (OBPs) and chemosensory proteins (CSPs). In other arthropods, such as ticks and mites, only IRs have been identified, while genes encoding for OBPs and CSPs are absent...
September 29, 2016: Insect Biochemistry and Molecular Biology
Xing Ge, Tiantao Zhang, Zhenying Wang, Kanglai He, Shuxiong Bai
The yellow peach moth, Conogethes punctiferalis, is an extremely important polyphagous insect in Asia. The chemosensory systems of moth play an important role in detecting food, oviposition sites and mate attraction. Several antennal chemosensory receptors are involved in odor detection. Our study aims to identify chemosensory receptor genes for potential applications in behavioral responses of yellow peach moth. By transcriptomic analysis of male and female antennae, 83 candidate chemosensory receptors, including 62 odorant receptors, 11 ionotropic receptors and 10 gustatory receptors were identified...
2016: Scientific Reports
Xin Yuan, Yan-Dong Jiang, Gui-Yao Wang, Hang Yu, Wen-Wu Zhou, Su Liu, Mao-Fa Yang, Jiaan Cheng, Geoff M Gurr, Michael O Way, Zeng-Rong Zhu
The rice water weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae), is a serious pest species both in its original distribution region of northern America and its invaded regions of eastern Asia and southern Europe. The odorant-binding proteins (OBPs) and the chemosensory proteins (CSPs) play important roles in host and mate locating, thus might play a significant role in the success of the species as an invader, which has not been characterized yet. We identified 10 OBPs and 5 CSPs in L. oryzophilus and investigated the expression profiles of these genes in various tissues by quantitative real-time PCR...
October 2016: Environmental Entomology
John R Shorter, Lauren M Dembeck, Logan J Everett, Tatiana V Morozova, Gunjan H Arya, Lavanya Turlapati, Genevieve E St Armour, Coby Schal, Trudy F C Mackay, Robert R H Anholt
Social interactions in insects are driven by conspecific chemical signals that are detected via olfactory and gustatory neurons. Odorant binding proteins (Obps) transport volatile odorants to chemosensory receptors, but their effects on behaviors remain poorly characterized. Here, we report that RNAi knockdown of Obp56h gene expression in Drosophila melanogaster enhances mating behavior by reducing courtship latency. The change in mating behavior that results from inhibition of Obp56h expression is accompanied by significant alterations in cuticular hydrocarbon (CHC) composition, including reduction in 5-tricosene (5-T), an inhibitory sex pheromone produced by males that increases copulation latency during courtship...
October 13, 2016: G3: Genes—Genomes—Genetics
Isobel Eyres, Ludovic Duvaux, Karim Gharbi, Rachel Tucker, David Hopkins, Jean-Christophe Simon, Julia Ferrari, Carole M Smadja, Roger K Butlin
Host-associated races of phytophagous insects provide a model for understanding how adaptation to a new environment can lead to reproductive isolation and speciation, ultimately enabling us to connect barriers to gene flow to adaptive causes of divergence. The pea aphid (Acyrthosiphon pisum) comprises host-races specialising on legume species, and provides a unique system for examining the early stages of diversification along a gradient of genetic and associated adaptive divergence. As host-choice produces assortative mating, understanding the underlying mechanisms of choice will contribute directly to understanding of speciation...
August 23, 2016: Molecular Ecology
Paul V Hickner, Chissa L Rivaldi, Cole M Johnson, Madhura Siddappaji, Gregory J Raster, Zainulabeuddin Syed
BACKGROUND: Drosophila suzukii differs from other melanogaster group members in their proclivity for laying eggs in fresh fruit rather than in fermenting fruits. Olfaction and gustation play a critical role during insect niche formation, and these senses are largely mediated by two important receptor families: olfactory and gustatory receptors (Ors and Grs). Earlier work from our laboratory has revealed how the olfactory landscape of D. suzukii is dominated by volatiles derived from its unique niche...
2016: BMC Genomics
Isobel Eyres, Julie Jaquiéry, Akiko Sugio, Ludovic Duvaux, Karim Gharbi, Jing-Jiang Zhou, Fabrice Legeai, Michaela Nelson, Jean-Christophe Simon, Carole M Smadja, Roger Butlin, Julia Ferrari
Host-race formation in phytophagous insects is thought to provide the opportunity for local adaptation and subsequent ecological speciation. Studying gene expression differences amongst host races may help to identify phenotypes under (or resulting from) divergent selection and their genetic, molecular and physiological bases. The pea aphid (Acyrthosiphon pisum) comprises host races specializing on numerous plants in the Fabaceae and provides a unique system for examining the early stages of diversification along a gradient of genetic and associated adaptive divergence...
September 2016: Molecular Ecology
Carolina Mengoni Goñalons, Marie Guiraud, María Gabriela de Brito Sanchez, Walter M Farina
Worker honeybees (Apis mellifera) carry out multiple tasks throughout their adult lifespan. It has been suggested that the insulin/insulin-like signalling pathway participates in regulating behavioural maturation in eusocial insects. Insulin signalling increases as the honeybee worker transitions from nurse to food processor to forager. As behavioural shifts require differential usage of sensory modalities, our aim was to assess insulin effects on olfactory and gustatory responsiveness as well as on olfactory learning in preforaging honeybee workers of different ages...
October 1, 2016: Journal of Experimental Biology
Ke Wu, Marjorie A Hoy
Pesticide-resistant populations of the predatory mite Metaseiulus (= Typhlodromus or Galendromus) occidentalis (Arthropoda: Chelicerata: Acari: Phytoseiidae) have been used in the biological control of pest mites such as phytophagous Tetranychus urticae. However, the pesticide resistance mechanisms in M. occidentalis remain largely unknown. In other arthropods, members of the glutathione-S-transferase (GST), cytochrome P450 (CYP) and carboxyl/cholinesterase (CCE) gene superfamilies are involved in the diverse biological pathways such as the metabolism of xenobiotics (e...
2016: PloS One
Zhongzhen Wu, He Zhang, Shuying Bin, Lei Chen, Qunxin Han, Jintian Lin
The Asian citrus psyllid, Diaphorina citri is the principal vector of the highly destructive citrus disease called Huanglongbing (HLB) or citrus greening, which is a major threat to citrus cultivation worldwide. More effective pest control strategies against this pest entail the identification of potential chemosensory proteins that could be used in the development of attractants or repellents. However, the molecular basis of olfaction in the Asian citrus psyllid is not completely understood. Therefore, we performed this study to analyze the antennal and abdominal transcriptome of the Asian citrus psyllid...
2016: PloS One
Tianfang Wang, Min Zhao, Bronwyn A Rotgans, Guoying Ni, Jeffrey F D Dean, Helen F Nahrung, Scott F Cummins
UNLABELLED: The European horntail woodwasp, Sirex noctilio, is an invasive insect that attacks conifer hosts, particularly Pinus species. Venom injected by female S. noctilio, together with its symbiotic fungus, damages the normal physiology of Pinus, leading to death of the tree. To identify the proteinaceous components in the venom and uncover the interplay between venom proteins and tree proteins, clarification of the overall profile of proteins produced in the venom gland apparatus was carried out in this work...
September 2, 2016: Journal of Proteomics
Chen Wu, Ross N Crowhurst, Alice B Dennis, Victoria G Twort, Shanlin Liu, Richard D Newcomb, Howard A Ross, Thomas R Buckley
Phasmatodea, more commonly known as stick insects, have been poorly studied at the molecular level for several key traits, such as components of the sensory system and regulators of reproduction and development, impeding a deeper understanding of their functional biology. Here, we employ de novo transcriptome analysis to identify genes with primary functions related to female odour reception, digestion, and male sexual traits in the New Zealand common stick insect Clitarchus hookeri (White). The female olfactory gene repertoire revealed ten odorant binding proteins with three recently duplicated, 12 chemosensory proteins, 16 odorant receptors, and 17 ionotropic receptors...
2016: PloS One
Robert Renthal, Leena Maghnani, Sandra Bernal, Yanyan Qu, Wendell P Griffith, Kim Lohmeyer, Felix D Guerrero, Lígia M F Borges, Adalberto Pérez de León
Proteomic analyses were done on two chemosensory appendages of the lone star tick, Amblyomma americanum. Proteins in the fore tarsi, which contain the olfactory Haller's organ, and in the palps, that include gustatory sensilla, were compared with proteins in the third tarsi. Also, male and female ticks were compared. Proteins were identified by sequence similarity to known proteins, and by three-dimensional homology modeling. Proteomic data were also compared with organ-specific transcriptomes from the tick Rhipicephalus microplus...
June 16, 2016: Insect Science
Hyeogsun Kwon, Moutaz Ali Agha, Ryan C Smith, Ronald J Nachman, Frédéric Marion-Poll, Patricia V Pietrantonio
Insect kinins (leucokinins) are multifunctional peptides acting as neurohormones and neurotransmitters. In females of the mosquito vector Aedes aegypti (L.), aedeskinins are known to stimulate fluid secretion from the renal organs (Malpighian tubules) and hindgut contractions by activating a G protein-coupled kinin receptor designated "Aedae-KR." We used protease-resistant kinin analogs 1728, 1729, and 1460 to evaluate their effects on sucrose perception and feeding behavior. In no-choice feeding bioassays (capillary feeder and plate assays), the analog 1728, which contains α-amino isobutyric acid, inhibited females from feeding on sucrose...
June 21, 2016: Proceedings of the National Academy of Sciences of the United States of America
A R Agnihotri, A A Roy, R S Joshi
Lepidoptera is one of the most widespread insect orders and includes several agriculturally important insect species. Ecological success of the lepidopteran insects partly depends on their adaptive chemoreception tactics, which play an important role in the selection of hosts, egg-laying sites and mates. Members of the G-protein coupled receptor family, gustatory receptors (GRs), are an integral part of the Lepidoptera chemosensory machinery. They are expressed in chemosensory neurones and are known to detect different environmental stimuli...
October 2016: Insect Molecular Biology
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