278 results match your criteria antennae compound


Efficacy of an improved method to screen semiochemicals of insect.

PeerJ 2021 20;9:e11510. Epub 2021 May 20.

Qingdao Special Crops Research Center, Chinese Academy of Agricultural Sciences, Qingdao, China.

Background: A combination of gas chromatography-electroantennographic detection (GC-EAD) and gas chromatography-mass spectrometry (GC-MS) is typically used to screen active compounds that play a role in the regulation of insect behavior. This method uses two kinds of gas chromatography (GC) equipment and needs to compare compounds between the two chromatograms, and it is tedious and costly. To improve detection efficiency, as well as reduce costs and the rate of missed detection, we designed a system connecting gas chromatography (GC), electroantennography (EAG), and mass spectrometry (MS), with MS used instead of the flame ionization detector (FID) as the GC-EAD detector. Read More

View Article and Full-Text PDF

Sex Pheromone of the Alfalfa Plant Bug, Adelphocoris lineolatus: Pheromone Composition and Antagonistic Effect of 1-Hexanol (Hemiptera: Miridae).

J Chem Ecol 2021 Apr 19. Epub 2021 Apr 19.

Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network (ELKH), H-1022 Herman Ottó u. 15, Budapest, Hungary.

The sex pheromone composition of alfalfa plant bugs, Adelphocoris lineolatus (Goeze), from Central Europe was investigated to test the hypothesis that insect species across a wide geographical area can vary in pheromone composition. Potential interactions between the pheromone and a known attractant, (E)-cinnamaldehyde, were also assessed. Coupled gas chromatography-electroantennography (GC-EAG) using male antennae and volatile extracts collected from females, previously shown to attract males in field experiments, revealed the presence of three physiologically active compounds. Read More

View Article and Full-Text PDF

Sexual deception of a beetle pollinator through floral mimicry.

Curr Biol 2021 May 25;31(9):1962-1969.e6. Epub 2021 Mar 25.

Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, Private Bag X01, Pietermaritzburg 3209, South Africa. Electronic address:

Sexual mimicry is a complex multimodal strategy used by some plants to lure insects to flowers for pollination. It is notable for being highly species-specific and is typically mediated by volatiles belonging to a restricted set of chemical compound classes. Well-documented cases involve exploitation of bees and wasps (Hymenoptera) and flies (Diptera). Read More

View Article and Full-Text PDF

Limoniic Acid - Major Component of the Sex Pheromones of the Click Beetles Limonius canus and L. californicus.

J Chem Ecol 2021 Feb 19;47(2):123-133. Epub 2021 Feb 19.

Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada.

Wireworms, the larvae of click beetles (Coleoptera: Elateridae), are soil-dwelling insect pests inflicting major economic damage on many types of agricultural crops worldwide. The objective of this work was to identify the female-produced sex pheromones of the Pacific Coast wireworm, Limonius canus LeConte, and the sugarbeet wireworm, L. californicus (Mannerheim) (Coleoptera: Elateridae). Read More

View Article and Full-Text PDF
February 2021

Molecular basis of ciliary defects caused by compound heterozygous IFT144/WDR19 mutations found in cranioectodermal dysplasia.

Hum Mol Genet 2021 Apr;30(3-4):213-225

Department of Physiological Chemistry, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan.

Primary cilia contain specific proteins to achieve their functions as cellular antennae. Ciliary protein trafficking is mediated by the intraflagellar transport (IFT) machinery containing the IFT-A and IFT-B complexes. Mutations in genes encoding the IFT-A subunits (IFT43, IFT121/WDR35, IFT122, IFT139/TTC21B, IFT140 and IFT144/WDR19) often result in skeletal ciliopathies, including cranioectodermal dysplasia (CED). Read More

View Article and Full-Text PDF

Energy Sources of the Depth-Generalist Mixotrophic Coral .

Front Mar Sci 2020 Nov;7:988

Department of Marine Biology, The Leon H. Charney School of Marine Sciences, University of Haifa, Haifa, Israel.

Energy sources of corals, ultimately sunlight and plankton availability, change dramatically from shallow to mesophotic (30-150 m) reefs. Depth-generalist corals, those that occupy both of these two distinct ecosystems, are adapted to cope with such extremely diverse conditions. In this study, we investigated the trophic strategy of the depth-generalist hermatypic coral and the ability of mesophotic colonies to adapt to shallow reefs. Read More

View Article and Full-Text PDF
November 2020

Biology of a putative male aggregation-sex pheromone in Sirex noctilio (Hymenoptera: Siricidae).

PLoS One 2020 31;15(12):e0244943. Epub 2020 Dec 31.

Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa.

A putative male-produced pheromone has recently been described for the global pest of pines, Sirex noctilio, but field-activity has not been demonstrated. This study aimed to investigate the pheromone biology of S. noctilio in more detail. Read More

View Article and Full-Text PDF

(3S,6E)-nerolidol-mediated rendezvous of Cyclocephala paraguayensis beetles in bottle gourd flowers.

PLoS One 2020 23;15(12):e0235028. Epub 2020 Dec 23.

Department of Entomology and Acarology, "Luiz de Queiroz" College of Agriculture, University of São Paulo (USP), Piracicaba, São Paulo, Brazil.

Cyclocephalini beetles of the genus Cyclocephala (Coleoptera: Melolonthidae: Dynastinae) use flowers of some plants as food, shelter, and mating sites. However, little is known about floral scent chemistry involved in this interaction. Here we show that a sesquiterpene alcohol mediates attraction of Cyclocephala paraguayensis Arrow, on bottle gourd flowers, Lagenaria siceraria (Cucurbitaceae). Read More

View Article and Full-Text PDF
January 2021

Broadly Tuned Odorant Receptor AlinOR59 Involved in Chemoreception of Floral Scent in .

J Agric Food Chem 2020 Nov 5;68(47):13815-13823. Epub 2020 Nov 5.

State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.

Plant volatiles such as floral scent compounds play a crucial role in mediating insect host locating, mate search, and oviposition sites selection. The alfalfa plant bug, (Goeze), is a seriously polyphagous herbivore of alfalfa and cotton that has an obvious preference for flowering host plants. In this study, we focused on the role of an odorant receptor AlinOR59 in the perception of plant volatiles in . Read More

View Article and Full-Text PDF
November 2020

A new species of Marphysa (Annelida: Eunicida: Eunicidae) from India, with notes on previously described or reported species from the region.

Zootaxa 2020 Sep 16;4852(3):zootaxa.4852.3.2. Epub 2020 Sep 16.

Australian Museum, 1 William Street, Sydney, NSW 2010, Australia. Biological Sciences, Macquarie University, North Ryde 2109, Australia..

A new species of Marphysa is described from India using both morphology and molecular data. The new species, Marphysa madrasi, belonging to the Teretiuscula-group, is characterised by having antennae about 2x longer than the prostomium, maxillae II and IV with a relatively large number of teeth (Mx II with 8+9; Mx IV with 7+11), compound spinigers present on a large range of mid-body chaetigers (at least 83-159), and pectinate chaetae present from the first few anterior chaetigers. We discuss all the species of this genus lacking compound falcigers (i. Read More

View Article and Full-Text PDF
September 2020

Identification of the Female-Produced Sex Pheromone of the Dotted White Geometrid Naxa seriaria (Lepidoptera: Geometridae).

J Chem Ecol 2020 Oct 15;46(10):927-934. Epub 2020 Sep 15.

Department of Agriculture, Forestry and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.

The dotted white geometrid moth, Naxa seriaria Motschulsky (Lepidoptera: Geometridae), is a pest of Oleaceae in Korea, Japan, and China. In this study, we identified (3Z,6Z,9Z,12Z,15Z)-heneicosapentaene (C-21 pentaene) as the only compound in extracts of the pheromone glands of female N. seriaria causing a response from receptors on the antennae of males in analyses by gas chromatography with electroantennographic detection. Read More

View Article and Full-Text PDF
October 2020

Light-harvesting complexes access analogue emissive states in different environments.

Chem Sci 2020 Jun 18;11(22):5697-5709. Epub 2020 May 18.

Department of Physics and Astronomy and Institute for Lasers, Life and Biophotonics , Faculty of Sciences , Vrije Universiteit Amsterdam , De Boelelaan 1081 , 1081 HV Amsterdam , The Netherlands . Email:

The light-harvesting complexes (LHCs) of plants can regulate the level of excitation in the photosynthetic membrane under fluctuating light by switching between different functional states with distinct fluorescence properties. One of the most fascinating yet obscure aspects of this regulation is how the vast conformational landscape of LHCs is modulated in different environments. Indeed, while in isolated antennae the highly fluorescent light-harvesting conformation dominates, LHC aggregates display strong fluorescence quenching, representing therefore a model system for the process of energy dissipation developed by plants to avoid photodamage in high light. Read More

View Article and Full-Text PDF

Modulation of octopaminergic and cholinergic pathways induced by Caatinga tree Manilkara rufula chemical compounds in Nauphoeta cinerea cockroaches.

Pestic Biochem Physiol 2020 Oct 15;169:104651. Epub 2020 Jul 15.

Laboratório de Neurobiologia e Toxinologia, Universidade Federal do Pampa, 97300-000 São Gabriel, RS, Brazil; Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, 97300-000 São Gabriel, RS, Brazil. Electronic address:

The entomotoxic potential of Manilkara rufula crude extract (CEMR) and its aqueous (AFMR) and methanolic (MFMR) fractions were evaluated against Nauphoeta cinerea cockroaches. The results point out to a direct modulation of octopaminergic and cholinergic pathways in insect nervous system. CEMR induced an anti-acetylcholinesterase (AChE) effect in cockroach brain homogenates. Read More

View Article and Full-Text PDF
October 2020

Divergent sensory investment mirrors potential speciation via niche partitioning across .

Elife 2020 06 30;9. Epub 2020 Jun 30.

Max Planck Institute for Chemical Ecology (MPICE), Department of Evolutionary Neuroethology, Jena, Germany.

The examination of phylogenetic and phenotypic characteristics of the nervous system, such as behavior and neuroanatomy, can be utilized as a means to assess speciation. Recent studies have proposed a fundamental tradeoff between two sensory organs, the eye and the antenna. However, the identification of ecological mechanisms for this observed tradeoff have not been firmly established. Read More

View Article and Full-Text PDF

Attraction of Chrysotropia ciliata (Neuroptera, Chrysopidae) Males to P-Anisaldehyde, a Compound with Presumed Pheromone Function.

J Chem Ecol 2020 Jul 26;46(7):597-609. Epub 2020 Jun 26.

Norwegian Institute of Bioeconomy Research, Division of Biotechnology and Plant Health, Box 115, NO-1431, Ås, PO, Norway.

In a field-trapping experiment with plant volatiles, we observed notably high attraction of green lacewing (Chrysotropia ciliata) males to the compound p-anisaldehyde. Based on this finding, we initiated the present study to elucidate this phenomenon and to investigate the chemical ecology of C. ciliata. Read More

View Article and Full-Text PDF

Sex-specific molecular specialization and activity rhythm-dependent gene expression in honey bee antennae.

J Exp Biol 2020 06 22;223(Pt 12). Epub 2020 Jun 22.

National Centre for Biological Sciences - Tata Institute of Fundamental Research, Bangalore-560056, Karnataka, India.

We performed an RNA-seq-based comparison of gene expression levels in the antennae of honey bee drones and time-trained foragers (workers) collected at different times of the day and different activity states. Interestingly, olfaction-related genes [i.e. Read More

View Article and Full-Text PDF

First record and taxonomic description of the genus (Fabricius) (Lepidoptera: Noctuidae: Plusiinae) from Pakistan.

Saudi J Biol Sci 2020 May 13;27(5):1375-1379. Epub 2019 Dec 13.

Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.

Species belonging to genus, Fabricius of the subfamily Plusiinae which are polyphagous in nature and pest of vegetables, foods, legumes, fodder, fruits, ornamental plants and cotton crops. Samples were collected from different localities of district Bahawalpur. For collection, comprehensive and comparative surveys were carried out during 2017-18 on taxonomic account of species of the genus Fabricius and resulted identified one species (Fabricius) first time from Pakistan. Read More

View Article and Full-Text PDF

Association between olfactory sensitivity and behavioral responses of Drosophila suzukii to naturally occurring volatile compounds.

Arch Insect Biochem Physiol 2020 Jul 19;104(3):e21669. Epub 2020 Mar 19.

Department of Biomedical Sciences, Section of Physiology, University of Cagliari, Cagliari, Italy.

Drosophila suzukii Matsumura (Diptera: Drosophilidae) is an invasive, destructive crop pest that originated in South East Asia. D. suzukii recently invaded Western countries and is threatening both European and American fruit industries. Read More

View Article and Full-Text PDF

Molecular Characterization and Expression of and in (Guenée) Under Different Environmental Stressors.

Front Physiol 2020 25;11:125. Epub 2020 Feb 25.

Provincial Key Laboratory for Agricultural Pest Management of Mountainous Regions, Institute of Entomology, Guizhou University, Guiyang, China.

, an important pest of corn, has substantial detrimental effects on corn production. The mitogen-activated protein kinase (MAPK) signaling pathway plays a pivotal role in an insect's resistance to environmental stress. The expression levels of and have been well recorded in several insects under different environmental stressors, at different developmental stages, and in various tissue types; however, there is limited information on and in agricultural insects. Read More

View Article and Full-Text PDF
February 2020

Environmental decomposition of olefinic cuticular hydrocarbons of generates a volatile pheromone that guides social behaviour.

Proc Biol Sci 2020 02 26;287(1921):20192466. Epub 2020 Feb 26.

Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA.

Once emitted, semiochemicals are exposed to reactive environmental factors that may alter them, thus disrupting chemical communication. Some species, however, might have adapted to detect environmentally mediated breakdown products of their natural chemicals as semiochemicals. We demonstrate that air, water vapour and ultraviolet (UV) radiation break down unsaturated cuticular hydrocarbons (CHCs) of (American cockroach), resulting in the emission of volatile organic compounds (VOCs). Read More

View Article and Full-Text PDF
February 2020

Host plant odours and their recognition by the odourant-binding proteins of Diaphorina citri Kuwayama (Hemiptera: Psyllidae).

Pest Manag Sci 2020 Jul 2;76(7):2453-2464. Epub 2020 Mar 2.

Guangdong Engineering Research Center for Insect Behavior Regulation; Key Laboratory of Bio-Pesticide Innovation and Application, College of Agriculture, South China Agricultural University, Guangzhou, China.

Background: The Asian citrus psyllid (ACP), Diaphorina citri, is one of the major pests in citrus production because it transmits huanglongbing, a devastating disease of citrus plants. Odourant-binding proteins (OBPs) play an important role in the olfactory perception of insects. Revealing the function of DcitOBPs is beneficial to the development of new ACP management strategies. Read More

View Article and Full-Text PDF

Rectal Gland Chemistry, Volatile Emissions, and Antennal Responses of Male and Female Banana Fruit Fly, .

Insects 2019 Dec 31;11(1). Epub 2019 Dec 31.

Australian Research Council Industrial Transformation Training Centre for Fruit Fly Biosecurity Innovation, Macquarie University, Sydney NSW 2109, Australia.

The banana fruit fly, (Tryon) (Diptera: Tephritidae), is an economically important pest endemic to Australia and mainland Papua New Guinea. The chemistry of its rectal glands, and the volatiles emitted during periods of sexual activity, has not been previously reported. Using gas chromatography-mass spectrometry (GC-MS), we find that male rectal glands contain ethyl butanoate, -(3-methylbutyl) acetamide, ethyl laurate and ethyl myristate, with ethyl butanoate as the major compound in both rectal gland and headspace volatile emissions. Read More

View Article and Full-Text PDF
December 2019

Selection of key floral scent compounds from fruit and vegetable crops by honey bees depends on sensory capacity and experience.

J Insect Physiol 2020 Feb - Mar;121:104002. Epub 2019 Dec 21.

The New Zealand Institute for Plant and Food Research Limited, Gerald St, Lincoln 7608, New Zealand; School of Biological Sciences, University of Auckland, Auckland, New Zealand.

Flowers have complex odours often comprising hundreds of volatile compounds. Floral scents are species-specific, and vary also among populations, varieties, sexes or lines, as well as with phenology. Honey bees, Apis mellifera, generally associate only a few key compounds among the complex floral scent with the food reward which guides their foraging choices. Read More

View Article and Full-Text PDF
December 2020

A method for distinguishing the important malaria vectors Anopheles dirus and An. cracens (Diptera: Culicidae) based on antennal sensilla of adult females.

Trop Biomed 2019 Dec;36(4):926-937

Center of Insect Vector Study, Department of Parasitology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.

Some species of the Anopheles dirus species complex are considered to be highly competent malaria vectors in Southeast Asia. Anopheles dirus is the primary vector of Plasmodium falciparum and P. vivax while An. Read More

View Article and Full-Text PDF
December 2019

Functional characterization of odorant receptors from the moth Eriocrania semipurpurella: A comparison of results in the Xenopus oocyte and HEK cell systems.

Insect Biochem Mol Biol 2020 02 25;117:103289. Epub 2019 Nov 25.

Department of Biology, Lund University, Lund, Sweden. Electronic address:

The Xenopus oocyte and the Human Embryonic Kidney (HEK) 293 cell expression systems are frequently used for functional characterization (deorphanization) of insect odorant receptors (ORs). However, the inherent characteristics of these heterologous systems differ in several aspects, which raises the question of whether the two systems provide comparable results, and how well the results correspond to the responses obtained from olfactory sensory neurons in vivo. Five candidate pheromone receptors were previously identified in the primitive moth Eriocrania semipurpurella (Esem) and their responses were characterized in HEK cells. Read More

View Article and Full-Text PDF
February 2020

CcOBP2 plays a crucial role in 3-carene olfactory response of the parasitoid wasp Chouioia cunea.

Insect Biochem Mol Biol 2020 02 22;117:103286. Epub 2019 Nov 22.

Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China. Electronic address:

Chouioia cunea (Yang) is a pupal parasitoid wasp and this species is able to seek host insects depending on its olfactory system. However, the molecular mechanism of the olfactory system in the C. cunea is still limited. Read More

View Article and Full-Text PDF
February 2020

A new species of Chiridurothrips Okajima from Miocene amber of the Dominican Republic (Thysanoptera: Phlaeothripidae).

Zootaxa 2019 Oct 14;4686(1):zootaxa.4686.1.9. Epub 2019 Oct 14.

Thrips-iD, Straßburger Straße 37A, 77652 Offenburg, Germany..

The thysanopteran genus Chiridurothrips Okajima is known from a single extant species, C. hisakoae Okajima, collected in Japan (ThripsWiki 2019). Occurring on dead leaves and branches of evergreen trees in the subtropical Ryukyu Islands, this species remains known from only five females (Okajima 1981, 2006; also pers. Read More

View Article and Full-Text PDF
October 2019

Taxonomic review of the genera Trigoniophthalmus Verhoeff and Coryphophthalmus Verhoeff (Archaeognatha, Machilidae) with descriptions of two new species of the genus Coryphophthalmus from Serbia.

Authors:
Vladimir Kaplin

Zootaxa 2019 Aug 28;4661(2):zootaxa.4661.2.6. Epub 2019 Aug 28.

All-Russian Institute of Plant Protection, St. Petersburg, Pushkin, 196608 Russia..

A redescription of Trigoniophthalmus Verhoeff, 1910 and descriptions of its subgenera Trigoniophthalmus s. str. and Silvestrius subgen. Read More

View Article and Full-Text PDF

Aggregation-Related Nonphotochemical Quenching in the Photosynthetic Membrane.

J Phys Chem Lett 2019 Dec 14;10(23):7340-7346. Epub 2019 Nov 14.

Institute of Chemical Physics, Faculty of Physics , Vilnius University , Saulėtekio Avenue 9 , LT-10222 Vilnius , Lithuania.

The photosynthetic apparatus of plants is a robust self-adjustable molecular system, able to function efficiently under varying environmental conditions. Under strong sunlight, it switches into photoprotective mode to avoid overexcitation by safely dissipating the excess absorbed light energy via nonphotochemical quenching (NPQ). Unfortunately, heterogeneous organization and simultaneous occurrence of multiple processes within the thylakoid membrane impede the study of natural NPQ under in vivo conditions; thus, usually artificially prepared antennae have been studied instead. Read More

View Article and Full-Text PDF
December 2019

Multiple functions of ion transport by the nuchal organ in embryos and neonates of the freshwater branchiopod crustacean .

J Exp Biol 2019 11 15;222(Pt 22). Epub 2019 Nov 15.

Department of Biology, McMaster University, Hamilton, ON, Canada L8S 4K1

The nuchal organ, also referred to as the dorsal organ or neck organ, is a dorsal structure located posteriorly to the compound eye, between the bases of the second antennae of embryonic and neonate branchiopod crustaceans such as the water flea, The ultrastructure of the nuchal organ is similar to ion-transporting tissues in other crustaceans, including abundant mitochondria and extensive amplification of apical and basal plasma membranes through microvilli and infoldings, but direct evidence for ion transport is lacking. We used the scanning ion-selective electrode technique to measure transport of Na, K, H, Cl, NH and Ca across the nuchal organ and body surface of embryos and neonates bathed in dechlorinated Hamilton tap water. Influx of Na and efflux of H and NH was found to occur across the nuchal organ of both embryos and neonates. Read More

View Article and Full-Text PDF
November 2019