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https://www.readbyqxmd.com/read/29043534/male-produced-aggregation-pheromone-of-coffee-bean-weevil-araecerus-fasciculatus
#1
Shuai Yang, Xiao-Fang Zhang, Yu-Lin Gao, Dan Chen, Dong-Mei She, Tao Zhang, Jun Ning
The coffee bean weevil (CBW), Araecerus fasciculatus (De Geer, 1775), is a cosmopolitan stored-product pest, especially in tropical and subtropical areas. Previous reports showed evidence for aggregation behavior of CBW and this study aimed to identify and evaluate the aggregation pheromone of this pest. Whole-body solvent extractions were analyzed by coupled gas chromatography-mass spectrometry and comparison of male and female extracts showed a male-specific compound which was identified as squalene, 2,6,10,15,19,23-hexamethyl-2,6,10,14,18,22-tetracosahexaene...
October 17, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29043489/comparative-transcriptome-analysis-of-apis-mellifera-antennae-of-workers-performing-different-tasks
#2
Hongyi Nie, Shupeng Xu, Cuiqin Xie, Haiyang Geng, Yazhou Zhao, Jianghong Li, Wei-Fone Huang, Yan Lin, Zhiguo Li, Songkun Su
Honey bee is a social insect. Its colony is mainly coordinated by the chemical signals such as pheromones produced by queen or brood. Correspondingly, the worker bee developed numerous complicated olfactory sensilla in antennae for detection of these colony chemical signals and nectar/pollen signals in foraging. With the normal development of new emerged workers, young adults (nurse bee) worked in colony at the first 2-3 weeks and then followed by the foraging activity outside of the hive, which give rise to great change of the surrounding chemical signals...
October 17, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/29034488/exploiting-whole-genome-sequence-data-to-fine-map-and-characterize-candidate-genes-within-a-quantitative-trait-loci-region-affecting-androstenone-on-porcine-chromosome-5
#3
M van Son, R Agarwal, M P Kent, H Grove, E Grindflek, S Lien
Male piglets are routinely castrated to eliminate boar taint. However, this treatment is undesirable, and alternative approaches, including genetic strategies to reduce boar taint, are demanded. Androstenone is one of the causative agents of boar taint, and a QTL region affecting this pheromone has previously been reported on SSC5: 22.6-24.8 Mb in Duroc. The QTL region is one of the few reported for androstenone that does not simultaneously affect levels of other sex steroids. The main objective of this study was to fine map this QTL...
October 16, 2017: Animal Genetics
https://www.readbyqxmd.com/read/29033330/exocrine-gland-secreting-peptide-1-is-a-key-chemosensory-signal-responsible-for-the-bruce-effect-in-mice
#4
Tatsuya Hattori, Takuya Osakada, Takuto Masaoka, Rumi Ooyama, Nao Horio, Kazutaka Mogi, Miho Nagasawa, Sachiko Haga-Yamanaka, Kazushige Touhara, Takefumi Kikusui
The Bruce effect refers to pregnancy termination in recently pregnant female rodents upon exposure to unfamiliar males [1]. This event occurs in specific combinations of laboratory mouse strains via the vomeronasal system [2, 3]; however, the responsible chemosensory signals have not been fully identified. Here we demonstrate that the male pheromone exocrine gland-secreting peptide 1 (ESP1) is one of the key factors that causes pregnancy block. Female mice exhibited high pregnancy failure rates upon encountering males that secreted different levels of ESP1 compared to the mated male...
October 11, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29032491/volatiles-emitted-by-calling-males-of-burying-beetles-and-ptomascopus-morio-coleoptera-silphidae-nicrophorinae-are-biogenetically-related
#5
Wolf Haberer, Thomas Schmitt, Peter Schreier, Anne-Katrin Eggert, Josef K Müller
In burying beetles, Nicrophorus spp. (Coleoptera: Silphidae: Nicrophorinae) mate finding is mediated by male produced volatile compounds. To date, pheromone components of only two species have been identified. In an attempt to better understand the evolution of male pheromone signaling in burying beetles, we investigated the male released volatiles of ten Nicrophorus species and one closely related nicrophorine species, Ptomascopus mori. Volatiles emitted by calling males were collected in the laboratory by means of solid phase micro extraction and analyzed using gas chromatography coupled with mass spectrometry...
October 14, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29030885/phylogenetic-distribution-of-a-male-pheromone-that-may-exploit-a-nonsexual-preference-in-lampreys
#6
Tyler J Buchinger, Ugo Bussy, Ke Li, Huiyong Wang, Mar Huertas, Cindy F Baker, Liang Jia, Michael C Hayes, Weiming Li, Nicholas S Johnson
Pheromones are among the most important sexual signals used by organisms throughout the animal kingdom. However, few are identified in vertebrates, leaving the evolutionary mechanisms underlying vertebrate pheromones poorly understood. Pre-existing biases in receivers' perceptual systems shape visual and auditory signaling systems, but studies on how receiver biases influence the evolution of pheromone communication remain sparse. The lamprey Petromyzon marinus uses a relatively well-understood suite of pheromones and offers a unique opportunity to study the evolution of vertebrate pheromone communication...
October 14, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29030574/aggregation-behavior-and-reproductive-compatibility-in-the-family-cimicidae
#7
Zachary DeVries, Russell Mick, Ondřej Balvín, Coby Schal
Bed bugs (Cimex lectularius) provide a unique opportunity to understand speciation and host-associated divergence in parasites. Recently, two sympatric but genetically distinct lineages of C. lectularius were identified: one associated with humans and one associated with bats. We investigated two mechanisms that could maintain genetic differentiation in the field: reproductive compatibility (via mating crosses) and aggregation fidelity (via two-choice sheltering assays). Effects were assessed at the intra-lineage level (within human-associated bed bugs), inter-lineage level (between human- and bat-associated bed bugs), and inter-species level (between C...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29030429/activating-mutations-in-quorum-sensing-regulator-rgg2-and-its-conformational-flexibility-in-the-absence-of-an-intermolecular-disulfide-bond
#8
Reid V Wilkening, Glenn C Capodagli, Atul Khataokar, Kaitlyn M Tylor, Matthew B Neiditch, Michael J Federle
Rap/Rgg/NprR/PlcR/PrgX (RRNPP) quorum-sensing systems use extracellular peptide pheromones that are detected by cytoplasmic receptors to regulate gene expression in firmicute bacteria. Rgg-type receptors are allosterically regulated through direct pheromone binding to control transcriptional activity; however, the receptor activation mechanism remains poorly understood. Previous work has identified a disulfide bond between Cys-45 residues within the homodimer interface of Rgg2 from Streptococcus dysgalactiae (Rgg2Sd)...
October 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29029204/evidence-of-premating-isolation-between-two-sibling-moths-ectropis-grisescens-and-ectropis-obliqua-lepidoptera-geometridae
#9
Z X Luo, Z Q Li, X M Cai, L Bian, Z M Chen
The sex pheromones of Ectropis grisescens Warren and Ectropis obliqua Prout were both reported to contain (Z,Z,Z)-3,6,9-octadecatriene (Z3,Z6,Z9-18:H) and (Z,Z)-3,9-cis-6,7-epoxy-octadecadiene (Z3,epo6,Z9-18:H). To clarify how these two sibling geometrids maintain premating isolation, the female sex pheromones of the two species were reexamined. Gas chromatography-electroantennographic detection (GC-EAD) and gas chromatography-mass spectrometry revealed two GC-EAD-active compounds, Z3,Z6,Z9-18:H and Z3,epo6,Z9-18:H, in E...
September 27, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29029181/characterization-of-odorant-receptors-from-a-non-ditrysian-moth-eriocrania-semipurpurella-sheds-light-on-the-origin-of-sex-pheromone-receptors-in-lepidoptera
#10
(no author information available yet)
No abstract text is available yet for this article.
September 27, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29029146/a-real-time-pcr-assay-for-the-separation-of-autographa-gamma-noctuidae-plusiinae-from-morphologically-similar-species-in-north-america
#11
Luke R Tembrock, Roxanne E Farris, Lisa Ledezma, Norman B Barr, Todd M Gilligan
The silver Y moth, Autographa gamma L. (Noctuidae: Plusiinae), is a pest of major economic importance in its native range of Europe, Asia, and North Africa. Although not present in North America, larvae of A. gamma are commonly intercepted in commodity shipments at U.S. ports, and adult surveys are conducted each year in more than 20 states. Because of the similarity of A. gamma to several native North American species that are attracted to the same pheromone lure, morphological identification of adults is difficult and requires dissection...
September 23, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29027767/monitoring-of-brown-stink-bug-hemiptera-pentatomidae-population-dynamics-in-corn-to-predict-its-abundance-using-weather-data
#12
Xin-Zhi Ni, Ted E Cottrell, G David Buntin, Xian-Chun Li, Wei Wang, Hong Zhuang
The brown stink bug (BSB), Euschistus servus (Say) (Hemiptera: Pentatomidae), is a serious economic pest of corn production in the Southeastern U. S. The BSB population dynamics was monitored for 17 weeks from tasseling to pre-harvest of corn plants (i.e., late May to mid-September) using pheromone traps in three corn fields from 2005 to 2009. The trap data showed two peaks in early June and mid-August, respectively. The relationship between trap catch and pre-growing season weather data was examined using correlation and stepwise multiple factor regression analyses...
October 13, 2017: Insect Science
https://www.readbyqxmd.com/read/29022550/streptococcus-gordonii-pheromone-s-g-cam373-may-influence-the-reservoir-of-antibiotic-resistance-determinants-of-enterococcus-faecalis-origin-in-the-oral-metagenome
#13
Jillian M Mansfield, Paul Herrmann, Amy M Jesionowski, M Margaret Vickerman
Streptococcus gordonii produces a pheromone heptapeptide, s.g.cAM373, which induces a conjugative mating response in Enterococcus faecalis cells carrying the responsive plasmid, pAM373. We investigated the extent of this intergeneric signaling on DNA acquisition by streptococcal species likely to cohabit oral biofilms. E. faecalis/pAM373/pAMS470 cells were incubated with synthetic s.g.cAM373, reverse peptide s.g.cAM373-R, or peptide-free medium and examined for their abilities to transfer plasmid DNA to streptococcal species in the presence of DNase...
October 12, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29021562/the-sex-pheromone-of-a-globally-invasive-honey-bee-predator-the-asian-eusocial-hornet-vespa-velutina
#14
Ping Wen, Ya-Nan Cheng, Shi-Hao Dong, Zheng-Wei Wang, Ken Tan, James C Nieh
The Asian hornet, Vespa velutina, is an invasive, globally-distributed predator of European honey bees and other insects. To better under its reproductive biology and to find a specific, effective, and low-impact control method for this species, we identified and tested the key compounds in V. velutina sex pheromone. Virgin gynes (reproductive females) produced this sex pheromone in the sixth intersegmental sternal glands of their abdomens. The active compounds were 4-oxo-octanoic acid (4-OOA, 10.4 μg bee(-1)) and 4-oxo-decanoic acid (4-ODA, 13...
October 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29017045/behavioural-ecology-spiders-play-the-imitation-game
#15
Tom N Sherratt
Examples of mimicry are widely celebrated because of the remarkable physical similarities they entail. A new study shows how an ant-mimicking spider uses behaviour to create the illusion of antennae, while walking in a manner resembling ants following pheromone trails.
October 9, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28994820/sexual-dimorphism-of-ambra1-related-autistic-features-in-human-and-mouse
#16
M Mitjans, M Begemann, A Ju, E Dere, L Wüstefeld, S Hofer, I Hassouna, J Balkenhol, B Oliveira, S van der Auwera, R Tammer, K Hammerschmidt, H Völzke, G Homuth, F Cecconi, K Chowdhury, H Grabe, J Frahm, S Boretius, T Dandekar, H Ehrenreich
Ambra1 is linked to autophagy and neurodevelopment. Heterozygous Ambra1 deficiency induces autism-like behavior in a sexually dimorphic manner. Extraordinarily, autistic features are seen in female mice only, combined with stronger Ambra1 protein reduction in brain compared to males. However, significance of AMBRA1 for autistic phenotypes in humans and, apart from behavior, for other autism-typical features, namely early brain enlargement or increased seizure propensity, has remained unexplored. Here we show in two independent human samples that a single normal AMBRA1 genotype, the intronic SNP rs3802890-AA, is associated with autistic features in women, who also display lower AMBRA1 mRNA expression in peripheral blood mononuclear cells relative to female GG carriers...
October 10, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28994207/identification-of-peptide-binding-sites-within-bsa-using-rapid-laser-induced-covalent-cross-linking-combined-with-high-performance-mass-spectrometry
#17
Melinda Hauser, Chen Qian, Steven T King, Sarah Kauffman, Fred Naider, Robert L Hettich, Jeffrey M Becker
We are developing a rapid, time-resolved method using laser-activated cross-linking to capture protein-peptide interactions as a means to interrogate the interaction of serum proteins as delivery systems for peptides and other molecules. A model system was established to investigate the interactions between bovine serum albumin (BSA) and 2 peptides, the tridecapeptide budding-yeast mating pheromone (α-factor) and the decapeptide human gonadotropin-releasing hormone (GnRH). Cross-linking of α-factor, using a biotinylated, photoactivatable p-benzoyl-L-phenylalanine (Bpa)-modified analog, was energy-dependent and achieved within seconds of laser irradiation...
October 10, 2017: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/28988862/early-pheromone-experience-modifies-a-synaptic-activity-to-influence-adult-pheromone-responses-of-c-%C3%A2-elegans
#18
Myeongjin Hong, Leesun Ryu, Maria C Ow, Jinmahn Kim, A Reum Je, Satya Chinta, Yang Hoon Huh, Kea Joo Lee, Rebecca A Butcher, Hongsoo Choi, Piali Sengupta, Sarah E Hall, Kyuhyung Kim
Experiences during early development can influence neuronal functions and modulate adult behaviors [1, 2]. However, the molecular mechanisms underlying the long-term behavioral effects of these early experiences are not fully understood. The C. elegans ascr#3 (asc-ΔC9; C9) pheromone triggers avoidance behavior in adult hermaphrodites [3-7]. Here, we show that hermaphrodites that are briefly exposed to ascr#3 immediately after birth exhibit increased ascr#3-specific avoidance as adults, indicating that ascr#3-experienced animals form a long-lasting memory or imprint of this early ascr#3 exposure [8]...
October 4, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28986331/expressional-divergences-of-two-desaturase-genes-determine-the-opposite-ratios-of-two-sex-pheromone-components-in-helicoverpa-armigera-and-helicoverpa-assulta
#19
Rui-Ting Li, Chao Ning, Ling-Qiao Huang, Jun-Feng Dong, Xianchun Li, Chen-Zhu Wang
The sympatric closely related species Helicoverpa armigera and Helicoverpa assulta use 97:3 and 7:93 of (Z)-11-hexadecenal and (Z)-9-hexadecenal, respectively, as their sex pheromone to find/locate correct sex mates. Moreover, (Z)-11-hexadecenyl alcohol and (Z)-9-hexadecenyl alcohol are more abundant in the pheromone gland of H. assulta than in that of H. armigera. To clarify the molecular basis of these differences, we sequenced the pheromone gland transcriptomes of the two species and compared the expression patterns of the candidate enzyme genes involved in the pheromone biosynthetic pathways by FPKM values and quantitative RT-PCR analysis...
October 3, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28986257/ecm22-and-upc2-regulate-yeast-mating-through-control-of-expression-of-the-mating-genes-prm1-and-prm4
#20
Thomas Höfken
Budding yeast mating is an excellent model for receptor-activated cell differentiation. Here we identify the related transcription factors Ecm22 and Upc2 as novel regulators of mating. Cells lacking both ECM22 and UPC2 display strong mating defects whereas deletion of either gene has no effect. Ecm22 and Upc2 positively regulate basal expression of PRM1 and PRM4. These genes are strongly induced in response to mating pheromone, which is also largely dependent on ECM22 and UPC2. We further show that deletion of PRM4 like PRM1 results in markedly reduced mating efficiency...
October 3, 2017: Biochemical and Biophysical Research Communications
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