5,745 results match your criteria Journal of chemical ecology[Journal]


Semiochemicals Mediating Defense, Intraspecific Competition, and Mate Finding in Leptopilina ryukyuensis and L. japonica (Hymenoptera: Figitidae), Parasitoids of Drosophila.

J Chem Ecol 2019 Feb 13. Epub 2019 Feb 13.

Department of Evolutionary Animal Ecology, Bayreuth University, Bayreuth, Germany.

Deciphering the processes driving the evolution of the diverse pheromone-mediated chemical communication system of insects is a fascinating and challenging task. Understanding how pheromones have arisen has been supported by studies with the model organism Leptopilina heterotoma, a parasitoid wasp whose defensive compound (-)-iridomyrmecin also evolved as a component of the female sex pheromone and as a cue to avoid competition with other females during host search. To understand how compounds can evolve from being non-communicative to having a communicative function and to shed light on the evolution of the multi-functional use of iridomyrmecin in the genus Leptopilina, the chemical communication of two additional species, L. Read More

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http://dx.doi.org/10.1007/s10886-019-01052-wDOI Listing
February 2019

Herbivore-Induced Volatiles from Maize Plants Attract Chelonus insularis, an Egg-Larval Parasitoid of the Fall Armyworm.

J Chem Ecol 2019 Feb 12. Epub 2019 Feb 12.

Grupo de Ecología de Artrópodos y Manejo de Plagas, Departamento de Agricultura, Sociedad y Ambiente, El Colegio de la Frontera Sur, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico.

Chelonus insularis (Hymenoptera: Braconidae) is an egg-larval endoparasitoid that attacks several lepidopteran species, including the fall armyworm (FAW), Spodoptera frugiperda, as one of its main hosts. In this study, we identified the volatiles emitted by maize plants undamaged and damaged by S. frugiperda larvae that were attractive to virgin C. Read More

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http://dx.doi.org/10.1007/s10886-019-01051-xDOI Listing
February 2019

Author Correction: An IDS-Type Sesquiterpene Synthase Produces the Pheromone Precursor (Z)-α-Bisabolene in Nezara viridula.

J Chem Ecol 2019 Feb 2. Epub 2019 Feb 2.

Department of Biological Sciences, Latham Hall, 220 Ag Quad Lane, Blacksburg, VA, 24061, USA.

The original version of this article unfortunately contained a mistake. Under the heading "Insects" in "Methods and Materials" the sentence "A colony of N. viridula originated with field collections near Tifton, Georgia, USA" is incorrect. Read More

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http://dx.doi.org/10.1007/s10886-019-01049-5DOI Listing
February 2019

Mechanisms of Resistance to Insect Herbivores in Isolated Breeding Lineages of Cucurbita pepo.

J Chem Ecol 2019 Feb 1. Epub 2019 Feb 1.

Department of Ecology and Evolutionary Biology, and Department of Entomology, Cornell University, Ithaca, NY, USA.

Although crop wild ancestors are often reservoirs of resistance traits lost during domestication, examining diverse cultivated germplasm may also reveal novel resistance traits due to distinct breeding histories. Using ten cultivars from two independent domestication events of Cucurbita pepo (ssp. pepo and texana), we identified divergences in constitutive and induced resistance measured by growth of generalist caterpillars and leaf traits. Read More

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http://dx.doi.org/10.1007/s10886-019-01046-8DOI Listing
February 2019

Effects of Pheromone Dose and Conspecific Density on the Use of Aggregation-Sex Pheromones by the Longhorn Beetle Phymatodes grandis and Sympatric Species (Coleoptera: Cerambycidae).

J Chem Ecol 2019 Feb 1. Epub 2019 Feb 1.

Department of Entomology, University of California, Riverside, CA, USA.

Many species of longhorn beetles (Coleoptera: Cerambycidae) utilize male-produced aggregation-sex pheromones that attract both sexes. However, the reasons why and the details of how this type of pheromone is used by cerambycids and other coleopteran species that utilize analogous male-produced pheromones remain unclear. Thus, our goals were to test the hypotheses that 1) cerambycids respond to pheromones in a dose-dependent (= release rate-dependent) manner and 2) pheromone emission is density-dependent. Read More

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http://dx.doi.org/10.1007/s10886-019-01047-7DOI Listing
February 2019

Changes in Toxin Quantities Following Experimental Manipulation of Toxin Reserves in Bufo bufo Tadpoles.

J Chem Ecol 2019 Jan 26. Epub 2019 Jan 26.

Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó Str. 15, Budapest, H-1022, Hungary.

Possessing toxins can contribute to an efficient defence against various threats in nature. However, we generally know little about the energy- and time-demands of developing toxicity in animals, which determines the efficiency of chemical defence and its trade-off with other risk-induced phenotypic responses. In this study we examined how immersion into norepinephrine solution inducing the release of stored toxins, administration of mild stress mimicking predator attack or simple handling during experimental procedure affected the quantity and number of toxin compounds present in common toad (Bufo bufo) tadpoles as compared to undisturbed control individuals, and investigated how fast toxin reserves were restored. Read More

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http://dx.doi.org/10.1007/s10886-019-01045-9DOI Listing
January 2019
1 Read

Effects of Non-Protein Amino Acids in Nectar on Bee Survival and Behavior.

J Chem Ecol 2019 Jan 6. Epub 2019 Jan 6.

Department of Life Sciences, University of Siena, via Pier Andrea Mattioli 4, 53100, Siena, Italy.

Nectar mediates complex interactions between plants and animals. Recent research has focused on nectar secondary compounds that may play a role in regulating some of these interactions. These compounds may affect the behavior of nectar feeders by interacting with their neurobiology. Read More

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http://dx.doi.org/10.1007/s10886-018-01044-2DOI Listing
January 2019

Genotypic Variation and Phenotypic Plasticity in Gene Expression and Emissions of Herbivore-Induced Volatiles, and their Potential Tritrophic Implications, in Cranberries.

J Chem Ecol 2019 Jan 3. Epub 2019 Jan 3.

Department of Entomology, Philip E. Marucci Center for Blueberry and Cranberry Research and Extension, Rutgers University, 125A Lake Oswego Road, Chatsworth, NJ, 08019, USA.

Herbivorous insects are important problems in cranberry (Vaccinium macrocarpon Ait.) production. The use of chemical pesticides is common practice, but beneficial insects such as natural enemies of herbivores (e. Read More

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http://dx.doi.org/10.1007/s10886-018-1043-0DOI Listing
January 2019
1 Read

Differential Susceptibility of Wild and Cultivated Blueberries to an Invasive Frugivorous Pest.

J Chem Ecol 2018 Dec 15. Epub 2018 Dec 15.

Laboratory of Evolutionary Entomology, Institute of Biology, University of Neuchâtel, Emile Argand 11, Case postale 158, 2009, Neuchâtel, Switzerland.

Highbush blueberry is a crop native to the northeast USA that has been domesticated for about 100 years. This study compared the susceptibility of wild and domesticated/cultivated highbush blueberries to an invasive frugivorous pest, the spotted wing drosophila (Drosophila suzukii). We hypothesized that: 1) cultivated fruits are preferred by D. Read More

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http://dx.doi.org/10.1007/s10886-018-1042-1DOI Listing
December 2018

Sex Pheromones of Two Leafminer Species, Antispila oinophylla and Holocacista rivillei (Lepidoptera: Heliozelidae) Infesting Grapevine in Italy.

J Chem Ecol 2019 Jan 14;45(1):1-8. Epub 2018 Dec 14.

Department of Biology, Lund University, Sölvegatan 37, 223 62, Lund, Sweden.

Two heliozelid species, Antispila oinophylla van Nieukerken & Wagner and Holocacista rivillei (Stainton) severely infest Italian grapevines. The volatile pheromones from calling females were collected by solid phase micro extraction (SPME) and analyzed by gas chromatography with electroantennographic detection (GC-EAD). Two compounds from A. Read More

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http://dx.doi.org/10.1007/s10886-018-1036-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6326996PMC
January 2019

Toxicity of Milkweed Leaves and Latex: Chromatographic Quantification Versus Biological Activity of Cardenolides in 16 Asclepias Species.

J Chem Ecol 2019 Jan 7;45(1):50-60. Epub 2018 Dec 7.

Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, 14853, USA.

Cardenolides are classically studied steroidal defenses in chemical ecology and plant-herbivore coevolution. Although milkweed plants (Asclepias spp.) produce up to 200 structurally different cardenolides, all compounds seemingly share the same well-characterized mode of action, inhibition of the ubiquitous Na/K ATPase in animal cells. Read More

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http://dx.doi.org/10.1007/s10886-018-1040-3DOI Listing
January 2019
5 Reads

Mistletoe Versus Host Pine: Does Increased Parasite Load Alter the Host Chemical Profile?

J Chem Ecol 2019 Jan 7;45(1):95-105. Epub 2018 Dec 7.

Terrestrial Ecology Research Group, Department of Ecology, Faculty of Science, University of Granada, Av. Fuentenueva s/n, E-18071, Granada, Spain.

Stress caused by parasitic plants, e.g. mistletoes, alters certain host-plant traits as a response. Read More

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http://dx.doi.org/10.1007/s10886-018-1039-9DOI Listing
January 2019

The Pattern of Straight Chain Hydrocarbons Released by Yucca Flowers (Asparagaceae).

J Chem Ecol 2019 Jan 10;45(1):46-49. Epub 2018 Dec 10.

Institute of Organic Chemistry, Universität Hamburg, Martin-Luther-King-Platz 6, 20146, Hamburg, Germany.

The hydrocarbon pattern in the floral scent of Yucca species was found to comprise a group of unbranched, mid-chain alkanes, alkenes, and an alkadiene. In Y. reverchonii, highly dominant (Z)-8-heptadecene is accompanied by (6Z,9Z)-6,9-heptadecadiene and heptadecane as minor components and by traces of other saturated and unsaturated hydrocarbons with similar chain length. Read More

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http://link.springer.com/10.1007/s10886-018-1037-y
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http://dx.doi.org/10.1007/s10886-018-1037-yDOI Listing
January 2019
9 Reads

Production and Distribution of Aldehyde and Alcohol Sex Pheromone Components in the Pheromone Gland of Females of the Moth Chloridea virescens.

J Chem Ecol 2019 Jan 1;45(1):9-17. Epub 2018 Dec 1.

Entomology Department, North Dakota State University, NDSU Dept 7650, PO Box 6050, Fargo, ND, 58108-6050, USA.

Aldehydes are components of many moth sex pheromones, and are thought to be produced from analogous alcohols by oxidase(s) in the cell membrane or the gland cuticle. This implies that the two types of components are produced and/or stored in different parts of the gland: alcohols in cells and aldehydes in cuticle. Few studies have investigated the distribution of components in moth pheromone glands. Read More

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http://dx.doi.org/10.1007/s10886-018-1041-2DOI Listing
January 2019
1 Read

Ellagitannins from the Onagraceae Decrease the Performance of Generalist and Specialist Herbivores.

J Chem Ecol 2019 Jan 4;45(1):86-94. Epub 2018 Dec 4.

Department of Biology, University of Toronto Mississauga, Mississauga, ON, L5L 1C6, Canada.

Phenolics have a role in defenses against herbivores, but the defensive functions of specific groups of phenolics are still poorly understood. For example, ellagitannins (a type of hydrolyzable tannin) are predicted to decrease insect herbivore performance, but the effect of different types of ellagitannins on generalist and specialist herbivores has rarely been assessed. Here, we test the effects of the dominant oligomeric ellagitannins of Oenothera biennis and other Onagraceae on herbivore performance. Read More

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http://link.springer.com/10.1007/s10886-018-1038-x
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http://dx.doi.org/10.1007/s10886-018-1038-xDOI Listing
January 2019
2 Reads

Mediation of Impacts of Elevated CO and Light Environment on Arabidopsis thaliana (L.) Chemical Defense against Insect Herbivory Via Photosynthesis.

J Chem Ecol 2019 Jan 22;45(1):61-73. Epub 2018 Nov 22.

Department of Plant Biology, University of Illinois at Urbana-Champaign, 265 Morrill Hall, 505 S. Goodwin, Urbana, IL, 61801, USA.

Elevated CO alters C3 plant tolerance to insect herbivory, as well as the induction kinetics of defense hormones salicylic acid (SA) and jasmonic acid (JA), but the underlying physiological mechanism causing this response is not well understood. In principle, SA could be induced under elevated CO by reactive oxygen signals generated in photosynthesis, ultimately influencing chemical defense. To test whether the effects of elevated CO on C3 plant chemical defense against herbivorous insects are modulated by photosynthesis, Arabidopsis thaliana var. Read More

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http://dx.doi.org/10.1007/s10886-018-1035-0DOI Listing
January 2019
8 Reads

Wax Ester Composition of Songbird Preen Oil Varies Seasonally and Differs between Sexes, Ages, and Populations.

J Chem Ecol 2019 Jan 20;45(1):37-45. Epub 2018 Nov 20.

Department of Biology, The University of Western Ontario, 1151 Richmond St, London, ON, N6A 5B7, Canada.

Chemical signaling has been well studied in invertebrates and mammals but less so in birds, due to the longstanding misconception that olfaction is unimportant or even non-existent in this taxon. However, recent findings suggest that olfaction plays an important role in avian mate choice and reproductive behavior, similar to other taxa. The leading candidate source for compounds involved in avian chemical communication is preen oil, a complex mixture secreted from the uropygial gland. Read More

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http://dx.doi.org/10.1007/s10886-018-1033-2DOI Listing
January 2019

Desiccation Resistance and Micro-Climate Adaptation: Cuticular Hydrocarbon Signatures of Different Argentine Ant Supercolonies Across California.

J Chem Ecol 2018 Dec 15;44(12):1101-1114. Epub 2018 Nov 15.

Department of Environmental Science, Policy, & Management, University of California, 130 Mulford Hall #3114, Berkeley, CA, 94720, USA.

Cuticular hydrocarbons (CHCs), the dominant fraction of the insects' epicuticle and the primary barrier to desiccation, form the basis for a wide range of chemical signaling systems. In eusocial insects, CHCs are key mediators of nestmate recognition, and colony identity appears to be maintained through a uniform CHC profile. In the unicolonial Argentine ant Linepithema humile, an unparalleled invasive expansion has led to vast supercolonies whose nestmates can still recognize each other across thousands of miles. Read More

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http://dx.doi.org/10.1007/s10886-018-1029-yDOI Listing
December 2018
7 Reads

Insectivorous Birds Are Attracted by Plant Traits Induced by Insect Egg Deposition.

J Chem Ecol 2018 Dec 12;44(12):1127-1138. Epub 2018 Nov 12.

Applied Zoology/Animal Ecology, Institute of Biology, Freie Universität Berlin, Haderslebener Str. 9, DE-12163, Berlin, Germany.

Insectivorous birds feed upon all developmental stages of herbivorous insects, including insect eggs if larvae and adults are unavailable. Insect egg deposition on plants can induce plant traits that are subsequently exploited by egg parasitoids searching for hosts. However, it is unknown whether avian predators can also use egg-induced plant changes for prey localization. Read More

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http://link.springer.com/10.1007/s10886-018-1034-1
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http://dx.doi.org/10.1007/s10886-018-1034-1DOI Listing
December 2018
19 Reads

The Male-Produced Aggregation-Sex Pheromone of the Cerambycid Beetle Plagionotus detritus ssp. detritus.

J Chem Ecol 2019 Jan 9;45(1):28-36. Epub 2018 Nov 9.

Unit of Chemical Ecology, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Box 102, Sundsvägen 14, 230 53, Alnarp, Sweden.

The number of longhorn beetles with confirmed aggregation-sex pheromones has increased rapidly in recent years. However, the species that have been studied most intensively are pests, whereas much less is known about the pheromones of longhorn beetles that are rare or threatened. We studied the cerambycid beetle Plagionotus detritus ssp. Read More

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http://dx.doi.org/10.1007/s10886-018-1031-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6327004PMC
January 2019
7 Reads

Identification and Field Testing of Volatile Components in the Sex Attractant Pheromone Blend of Female House Mice.

J Chem Ecol 2019 Jan 9;45(1):18-27. Epub 2018 Nov 9.

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

Recently, it was reported (i) that the sex pheromone blend of male house mice, Mus musculus, comprises not only volatile components (3,4-dehydro-exo-brevicomin; 2-sec-butyl-4,5-dihydrothiazole) but also a component of low volatility (the sex steroid testosterone), and (ii) that the sex steroids progesterone and estradiol are sex pheromone components of female house mice. Here we tested the hypothesis that the sex attractant pheromone blend of female mice, analogous to that of male mice, also comprises volatile pheromone components. Analyzing by GC-MS the head space volatiles of bedding soiled with urine and feces of laboratory-kept females and males revealed three candidate pheromone components (CPCs) that were adult female-specific: butyric acid, 2-methyl butyric acid and 4-heptanone. Read More

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http://dx.doi.org/10.1007/s10886-018-1032-3DOI Listing
January 2019

Preferences of Specialist and Generalist Mammalian Herbivores for Mixtures Versus Individual Plant Secondary Metabolites.

J Chem Ecol 2019 Jan 6;45(1):74-85. Epub 2018 Nov 6.

Boise State University, 1910 W. University Dr, Boise, ID, 83725, USA.

Herbivores that forage on chemically defended plants consume complex mixtures of plant secondary metabolites (PSMs). However, the mechanisms by which herbivores tolerate mixtures of PSMs are relatively poorly understood. As such, it remains difficult to predict how PSMs, singly or as complex mixtures, influence diet selection by herbivores. Read More

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http://link.springer.com/10.1007/s10886-018-1030-5
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http://dx.doi.org/10.1007/s10886-018-1030-5DOI Listing
January 2019
11 Reads

Accelerated Development and Toxin Tolerance of the Navel Orangeworm Amyelois transitella (Lepidoptera: Pyralidae) in the Presence of Aspergillus flavus.

J Chem Ecol 2018 Dec 28;44(12):1170-1177. Epub 2018 Oct 28.

Department of Entomology, University of Illinois at Urbana-Champaign, 204 Morrill Hall, 505 S. Goodwin Ave, Urbana, IL, 61801, USA.

The navel orangeworm (Amyelois transitella) and the fungus Aspergillus flavus constitute a facultative mutualism and pest complex in tree nut and fruit orchards in California. The possibility exists that the broad detoxification capabilities of A. flavus benefit its insect associate by metabolizing toxicants, including hostplant phytochemicals and pesticides. Read More

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http://link.springer.com/10.1007/s10886-018-1027-0
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December 2018
8 Reads

Paenibacillus polymyxa Associated with the Stingless Bee Melipona scutellaris Produces Antimicrobial Compounds against Entomopathogens.

J Chem Ecol 2018 Dec 23;44(12):1158-1169. Epub 2018 Oct 23.

Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, Ribeirão Preto, SP, 14040-903, Brazil.

Social insects are frequently observed in symbiotic association with bacteria that produce antimicrobial natural products as a defense mechanism. There is a lack of studies on the microbiota associated with stingless bees and their antimicrobial compounds. To the best of our knowledge, this study is the first to report the isolation of Paenibacillus polymyxa ALLI-03-01 from the larval food of the stingless bee Melipona scutellaris. Read More

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http://link.springer.com/10.1007/s10886-018-1028-z
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http://dx.doi.org/10.1007/s10886-018-1028-zDOI Listing
December 2018
17 Reads

Correction to: Novel floral scent compounds from night-blooming Araceae pollinated by cyclocephaline scarabs (Melolonthidae, Cyclocephalini).

J Chem Ecol 2018 Oct 18. Epub 2018 Oct 18.

Department of Biosciences, University of Salzburg, Billrothstraße 11 and Hellbrunnerstraße 34, 5020, Salzburg, Austria.

The original version of this article unfortunately contained a mistake. The description of subheadings of Figs. 4c and d have to be interchanged. Read More

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http://dx.doi.org/10.1007/s10886-018-1026-1DOI Listing
October 2018
2.750 Impact Factor

(Z)-7-Hexadecene is an Aggregation-Sex Pheromone Produced by Males of the South American Cerambycid Beetle Susuacanga octoguttata.

J Chem Ecol 2018 Dec 10;44(12):1115-1119. Epub 2018 Oct 10.

Departments of Entomology and Chemistry, University of California, Riverside, CA, 92521, USA.

We describe the identification, synthesis, and field bioassays of a novel aggregation-sex pheromone produced by males of Susuacanga octoguttata (Germar), a South American cerambycid beetle. Analyses of extracts of headspace volatiles produced by adult beetles revealed a sex-specific compound emitted by males which was identified as (Z)-7-hexadecene by microchemical and spectroscopic analyses. The synthesized pheromone was attractive to beetles of both sexes in field trials. Read More

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http://link.springer.com/10.1007/s10886-018-1024-3
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December 2018
2 Reads

Sphagnum Species Modulate their Phenolic Profiles and Mycorrhizal Colonization of Surrounding Andromeda polifolia along Peatland Microhabitats.

J Chem Ecol 2018 Dec 8;44(12):1146-1157. Epub 2018 Oct 8.

Laboratoire ChronoEnvironnement, UMR CNRS 6249 USC INRA, Université de Bourgogne-Franche Comté, 25 211, Montbéliard Cedex, France.

Sphagnum mosses mediate long-term carbon accumulation in peatlands. Given their functional role as keystone species, it is important to consider their responses to ecological gradients and environmental changes through the production of phenolics. We compared the extent to which Sphagnum phenolic production was dependent on species, microhabitats and season, and how surrounding dwarf shrubs responded to Sphagnum phenolics. Read More

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http://link.springer.com/10.1007/s10886-018-1023-4
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http://dx.doi.org/10.1007/s10886-018-1023-4DOI Listing
December 2018
1 Read

Neuronal Responses of Antennal Olfactory Sensilla to Insect Chemical Repellents in the Yellow Fever Mosquito, Aedes aegypti.

J Chem Ecol 2018 Dec 6;44(12):1120-1126. Epub 2018 Oct 6.

Department of Entomology & Plant Pathology, Auburn University, 301 Funchess Hall, Auburn, AL, 36849-5413, USA.

The yellow fever mosquito, Aedes aegypti, is a vector of many human diseases such as yellow fever, dengue fever, and Zika. As insecticide resistance has been widely reported, chemical repellents have been adopted as alternative options for mosquito and mosquito-borne disease control. This study characterized the responses of olfactory receptor neurons (ORNs) in different types of antennal olfactory sensilla in Ae. Read More

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http://link.springer.com/10.1007/s10886-018-1022-5
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December 2018
10 Reads

Methyl Jasmonate Changes the Composition and Distribution Rather than the Concentration of Defence Compounds: a Study on Pyrrolizidine Alkaloids.

J Chem Ecol 2018 Oct 4. Epub 2018 Oct 4.

Plant Ecology and Phytochemistry, Institute of Biology, Leiden University, Sylviusweg 72, P. O. Box 9505, 2300 RA, Leiden, The Netherlands.

In this study we investigated the effect of methyl jasmonate (MeJA) application on pyrrolizidine alkaloid (PA) concentration and composition of two closely related Jacobaea species. In addition, we examined whether MeJA application affected herbivory of the polyphagous leaf feeding herbivore Spodoptera exigua. A range of concentrations of MeJA was added to the medium of Jacobaea vulgaris and J. Read More

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http://link.springer.com/10.1007/s10886-018-1020-7
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October 2018
2 Reads

Toxic Peptides in Populations of Two Pergid Sawflies, Potential Biocontrol Agents of Brazilian Peppertree.

J Chem Ecol 2018 Dec 1;44(12):1139-1145. Epub 2018 Oct 1.

Invasive Plant Research Laboratory, USDA-ARS, 3225 College Avenue, Ft. Lauderdale, FL, 33314, USA.

Determination of the safety of agents prior to release is one of the most important research goals in biological control. In addition to concerns for the safety of non-target plants, determination of the potential toxic properties of new agents needs to be assessed. Numerous phytophagous insects are defended by chemicals against the attack of natural enemies. Read More

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http://dx.doi.org/10.1007/s10886-018-1021-6DOI Listing
December 2018
2 Reads

An IDS-Type Sesquiterpene Synthase Produces the Pheromone Precursor (Z)-α-Bisabolene in Nezara viridula.

J Chem Ecol 2018 Sep 29. Epub 2018 Sep 29.

Department of Biological Sciences, Latham Hall, 220 Ag Quad Lane, Blacksburg, VA, 24061, USA.

Insects use a wide range of structurally diverse pheromones for intra-specific communication. Compounds in the class of terpenes are emitted as sex, aggregation, alarm, or trail pheromones. Despite the common occurrence of terpene pheromones in different insect lineages, their origin from dietary host plant precursors or de novo biosynthetic pathways often remains unknown. Read More

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http://dx.doi.org/10.1007/s10886-018-1019-0DOI Listing
September 2018
3 Reads

Differential Impact of Herbivores from Three Feeding Guilds on Systemic Secondary Metabolite Induction, Phytohormone Levels and Plant-Mediated Herbivore Interactions.

J Chem Ecol 2018 Dec 29;44(12):1178-1189. Epub 2018 Sep 29.

Agroscope, Research Division Agroecology and Environment, Reckenholzstrasse 191, 8046, Zurich, Switzerland.

Phytochemical defense responses of plants are often herbivore-specific and can be affected by a herbivore's feeding mode. However, comprehensive studies documenting the impact of multiple herbivores from different feeding guilds on induced phytochemical responses in distal leaves and its consequences for plant-mediated herbivore interactions are limited and findings are inconsistent. We investigated how herbivory by leaf-chewing caterpillars, cell-content feeding spider mites and phloem-feeding aphids and whiteflies affect secondary metabolomes and phytohormone levels in youngest, non-damaged cotton leaves (distal leaves). Read More

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December 2018
1 Read

What Can Computational Modeling Tell Us about the Diversity of Odor-Capture Structures in the Pancrustacea?

J Chem Ecol 2018 Dec 21;44(12):1084-1100. Epub 2018 Sep 21.

Applied Mathematics Unit School of Natural Sciences, University of California, Merced, CA, 95343, USA.

A major transition in the history of the Pancrustacea was the invasion of several lineages of these animals onto land. We investigated the functional performance of odor-capture organs, antennae with olfactory sensilla arrays, through the use of a computational model of advection and diffusion of odorants to olfactory sensilla while varying three parameters thought to be important to odor capture (Reynolds number, gap-width-to-sensillum-diameter ratio, and angle of the sensilla array with respect to oncoming flow). We also performed a sensitivity analysis on these parameters using uncertainty quantification to analyze their relative contributions to odor-capture performance. Read More

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http://link.springer.com/10.1007/s10886-018-1017-2
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http://dx.doi.org/10.1007/s10886-018-1017-2DOI Listing
December 2018
3 Reads

Carabidae Semiochemistry: Current and Future Directions.

J Chem Ecol 2018 Dec 19;44(12):1069-1083. Epub 2018 Sep 19.

Department of Entomology, The Pennsylvania State University, 501 ASI Building, University Park, State College, PA, 16802, USA.

Ground beetles (Carabidae) are recognized for their diverse, chemically-mediated defensive behaviors. Produced using a pair of pygidial glands, over 250 chemical constituents have been characterized across the family thus far, many of which are considered allomones. Over the past century, our knowledge of Carabidae exocrine chemistry has increased substantially, yet the role of these defensive compounds in mediating behavior other than repelling predators is largely unknown. Read More

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http://dx.doi.org/10.1007/s10886-018-1011-8DOI Listing
December 2018
2 Reads

Novel Floral Scent Compounds from Night-Blooming Araceae Pollinated by Cyclocephaline Scarabs (Melolonthidae, Cyclocephalini).

J Chem Ecol 2018 Sep 19. Epub 2018 Sep 19.

Department of Biosciences, University of Salzburg, Billrothstraße 11 and Hellbrunnerstraße 34, 5020, Salzburg, Austria.

Nocturnal flowering plants often release strong scents to attract their pollinators. Among night active flower visitors are cyclocephaline scarab beetles, which have been demonstrated to respond to uncommon volatile organic compounds released in high amounts by their host plants. In Araceae, the molecular structure of several such compounds is yet to be unveiled. Read More

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http://dx.doi.org/10.1007/s10886-018-1018-1DOI Listing
September 2018
3 Reads
2.750 Impact Factor

Phytochemical Background Mediates Effects of Pyrrolizidine Alkaloids on Western Flower Thrips.

J Chem Ecol 2018 Sep 16. Epub 2018 Sep 16.

Plant Ecology and Phytochemistry, Institute of Biology, Leiden University, PO Box 9505, 2300, RA, Leiden, The Netherlands.

Plants produce an extremely diverse array of metabolites that mediate many aspects of plant-environment interactions. In the context of plant-herbivore interactions, it is as yet poorly understood how natural backgrounds shape the bioactivity of individual metabolites. We tested the effects of a methanol extract of Jacobaea plants and five fractions derived from this extract, on survival of western flower thrips (WFT). Read More

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http://dx.doi.org/10.1007/s10886-018-1009-2DOI Listing
September 2018

The Role of the Glucosinolate-Myrosinase System in Mediating Greater Resistance of Barbarea verna than B. vulgaris to Mamestra brassicae Larvae.

J Chem Ecol 2018 Sep 14. Epub 2018 Sep 14.

Copenhagen Plant Science Center and Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg C, Denmark.

We investigated the influences of two structurally similar glucosinolates, phenethylglucosinolate (gluconasturtiin, NAS) and its (S)-2-hydroxyl derivative glucobarbarin (BAR), as well as their hydrolysis products on larvae of the generalist Mamestra brassicae (Lepidoptera: Noctuidae). Previous results suggested a higher defensive activity of BAR than NAS based on resistance toward M. brassicae larvae of natural plant genotypes of Barbarea vulgaris R. Read More

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http://dx.doi.org/10.1007/s10886-018-1016-3DOI Listing
September 2018

Pollinator Preferences for Floral Volatiles Emitted by Dimorphic Anthers of a Buzz-Pollinated Herb.

J Chem Ecol 2018 Nov 7;44(11):1058-1067. Epub 2018 Sep 7.

El Colegio de la Frontera Sur, Unidad Tapachula, Carretera Antiguo Aeropuerto km 2.5, C.P. 30700, Tapachula, Chiapas, Mexico.

Floral scents attract pollinators to plant rewards; in nectarless flowers, pollen grains are the only reward. Thus, pollen not only fertilizes ovules, but also feeds pollinators. This dilemma is resolved by specialization of anthers (i. Read More

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http://link.springer.com/10.1007/s10886-018-1014-5
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http://dx.doi.org/10.1007/s10886-018-1014-5DOI Listing
November 2018
15 Reads

Antennal Olfactory Physiology and Behavior of Males of the Ponerine Ant Harpegnathos saltator.

J Chem Ecol 2018 Nov 7;44(11):999-1007. Epub 2018 Sep 7.

School of Life Sciences, Arizona State University, 427 East Tyler Mall, Tempe, AZ, 85283, USA.

In comparison to the large amount of study on the communication abilities of females in ant societies and their associated chemical ecology and sensory physiology, such study of male ants has been largely ignored; accordingly, little is known about their olfactory sensory capabilities. To address this, we explored peripheral odor sensitivities in male Harpegnathos saltator by measuring the electrophysiological activity of olfactory sensory neurons within antennal trichoid and coeloconic sensilla using an extracellular recording technique. In an initial trial of 46 compounds, sensilla trichodea responded strongly to two alarm pheromone components, while a limited number of non-hydrocarbon odorants elicited strong responses in sensilla coeloconica. Read More

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http://link.springer.com/10.1007/s10886-018-1013-6
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http://dx.doi.org/10.1007/s10886-018-1013-6DOI Listing
November 2018
9 Reads

Host Plant Suitability in a Specialist Herbivore, Euphydryas anicia (Nymphalidae): Preference, Performance and Sequestration.

J Chem Ecol 2018 Nov 3;44(11):1051-1057. Epub 2018 Sep 3.

Department of Ecology and Evolutionary Biology and University of Colorado Museum, 334 UCB, University of Colorado, Boulder, CO, 80309, USA.

The checkerspot butterfly, Euphydryas anicia (Nymphalidae), specializes on plants containing iridoid glycosides and has the ability to sequester these compounds from its host plants. This study investigated larval preference, performance, and sequestration of iridoid glycosides in a population of E. anicia at Crescent Meadows, Colorado, USA. Read More

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http://dx.doi.org/10.1007/s10886-018-1012-7DOI Listing
November 2018
12 Reads

Ontogeny of Defensive Chemistry in Longitarsus Flea Beetles (Coleoptera, Chrysomelidae): More Protection for the Vulnerable Stages?

J Chem Ecol 2018 Aug 31. Epub 2018 Aug 31.

Institute of Biology I, University of Freiburg, Freiburg, Germany.

Several species of the flea beetles genus Longitarsus sequester pyrrolizidine alkaloids (PAs) from their host plants. Previous data demonstrated that PAs may be transferred from root-feeding larvae into the adult beetles. Here we compared the patterns and concentrations found in larvae and pupae of L. Read More

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http://link.springer.com/10.1007/s10886-018-1010-9
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http://dx.doi.org/10.1007/s10886-018-1010-9DOI Listing
August 2018
5 Reads

Identification of the Aggregation-sex Pheromone of the Cerambycid Beetle Phymatodes pusillus ssp. pusillus and Evidence of a Synergistic Effect from a Heterospecific Pheromone Component.

J Chem Ecol 2018 Nov 28;44(11):987-998. Epub 2018 Aug 28.

Unit of Chemical Ecology, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Box 102, Sundsvägen 14, 230 53, Alnarp, Sweden.

The longhorn beetle Phymatodes (Poecilium) pusillus ssp. pusillus is a rare, elusive species that is included on Red Lists of threatened species. Previously, 1-hexanol and 1-butanol were reported as putative components of the aggregation-sex pheromone of this species, but behavioral assays to confirm this have not been performed. Read More

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http://dx.doi.org/10.1007/s10886-018-1008-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6182721PMC
November 2018
7 Reads

The Effects of Milkweed Induced Defense on Parasite Resistance in Monarch Butterflies, Danaus plexippus.

J Chem Ecol 2018 Nov 20;44(11):1040-1044. Epub 2018 Aug 20.

Department of Biology, Emory University, 1510 Clifton Road, Atlanta, GA, 30322, USA.

Many plants express induced defenses against herbivores through increasing the production of toxic secondary chemicals following damage. Phytochemical induction can directly or indirectly affect other organisms within the community. In tri-trophic systems, increased concentrations of plant toxins could be detrimental to plants if herbivores can sequester these toxins as protective chemicals for themselves. Read More

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http://dx.doi.org/10.1007/s10886-018-1007-4DOI Listing
November 2018
1 Read

Fatal Attraction: Ricinus communis Provides an Attractive but Risky Mating Site for Holotrichia parallela Beetles.

J Chem Ecol 2018 Oct 16;44(10):965-974. Epub 2018 Aug 16.

Department of Entomology, College of Plant Protection, Henan Agricultural University, No. 63 Nongye Road, Zhengzhou, Henan Province, China.

The castor bean, Ricinus communis L., is a non-host plant for the large black chafer, Holotrichia parallela Motschulsky (Coleoptera: Scarabaeidae). In laboratory bioassays we found that this plant was no less attractive than the main host plant (peanut, Arachis hypogaea) and three food plant species: velvetleaf (Abutilon theophrasti), the glossy privet (Ligustrum lucidum), and the Siberian elm (Ulmus pumila). Read More

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http://link.springer.com/10.1007/s10886-018-0994-5
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http://dx.doi.org/10.1007/s10886-018-0994-5DOI Listing
October 2018
8 Reads

Clonal Saplings of Trembling Aspen Do Not Coordinate Defense Induction.

J Chem Ecol 2018 Nov 15;44(11):1045-1050. Epub 2018 Aug 15.

Department of Entomology, University of Wisconsin-Madison, Madison, WI, 53706, USA.

Induction of plant chemical defenses in response to insect feeding may be localized to the site of damage or expressed systemically, mediated by signal transduction throughout the plant. Such systemic induction processes have been widely investigated in plants with single stems, but rarely in clonal plants comprised of multiple ramets with vascular connections. For a clonal tree species such as trembling aspen (Populus tremuloides Michx), integration of induced defense within clones could be adaptive, as clones are spatially extensive and susceptible to outbreak herbivores. Read More

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http://dx.doi.org/10.1007/s10886-018-1006-5DOI Listing
November 2018
13 Reads

Role of Chemical Mediators in Aquatic Interactions across the Prokaryote-Eukaryote Boundary.

J Chem Ecol 2018 Nov 14;44(11):1008-1021. Epub 2018 Aug 14.

Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll Institute, Beutenbergstraße 11a, 07745, Jena, Germany.

There is worldwide growing interest in the occurrence and diversity of metabolites used as chemical mediators in cross-kingdom interactions within aquatic systems. Bacteria produce metabolites to protect and influence the growth and life cycle of their eukaryotic hosts. In turn, the host provides a nutrient-enriched environment for the bacteria. Read More

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http://dx.doi.org/10.1007/s10886-018-1004-7DOI Listing
November 2018

Particular Levels of Odors Released by Virgin Females Attract Conspecific Males of the Funnel-Web Spider Allagelena difficilis.

J Chem Ecol 2018 Oct 10;44(10):905-914. Epub 2018 Aug 10.

College of Life Sciences, Jinggangshan University, Ji'an, 343009, Jiangxi, China.

Female-released chemical signals are crucial clues for mate-searching males to locate and gain sexual receptivity of conspecific females. Abundant behavioral evidence indicates that female spiders release sex pheromones to guide mate-searching behavior of conspecific mature males. However, the chemical nature of spider pheromones is poorly understood. Read More

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http://dx.doi.org/10.1007/s10886-018-0998-1DOI Listing
October 2018
1 Read

Identification and Field Evaluation of the Sex Pheromone of Orthaga achatina (Lepidoptera: Pyralidae).

J Chem Ecol 2018 Oct 9;44(10):886-893. Epub 2018 Aug 9.

Education Ministry Key Laboratory of Integrated Management of Crop Disease and Pests/College of Plant Protection, Nanjing Agricultural University, No.1 Weigang, Nanjing, 210095, China.

Orthaga achatina (Lepidoptera: Pyralidae) is the most serious pest in south China of camphor trees, Cinnamomum camphora (L.) Presl, an important urban tree species. Gas chromatography-electroantennographic detection (GC-EAD) of the sex pheromone of O. Read More

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http://dx.doi.org/10.1007/s10886-018-0997-2DOI Listing
October 2018
3 Reads

α-Amylase Mediates Host Acceptance in the Braconid Parasitoid Cotesia flavipes.

J Chem Ecol 2018 Nov 7;44(11):1030-1039. Epub 2018 Aug 7.

IRD c/o icipe, P.O. Box 30772-00100, Nairobi, Kenya.

Foraging parasitoids use chemical signals in host recognition and selection processes. Although, the volatiles play a relevant role in the localization by parasitoids of their hosts feeding on plants, the host identification process for acceptance occurs mainly during contact between the parasitoid and its host where host products related to feeding activities, fecal pellets and oral secretions, play a crucial role. The purpose of this study was to identify the nature of the contact kairomone(s) that mediate the acceptance for oviposition of the parasitoid Cotesia flavipes Cameron (Hymenoptera, Braconidae), which was released in Kenya in 1993 to control the invasive crambid Chilo partellus (Swinhoe). Read More

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http://dx.doi.org/10.1007/s10886-018-1002-9DOI Listing
November 2018
8 Reads

Quinolizidine and Pyrrolizidine Alkaloid Chemical Ecology - a Mini-Review on Their Similarities and Differences.

Authors:
Michael Wink

J Chem Ecol 2018 Aug 6. Epub 2018 Aug 6.

Heidelberg University, Institute of Pharmacy and Molecular Biotechnology, INF 364, D-69120, Heidelberg, Germany.

This mini-review summarizes over 40 years of research on quinolizidine (QAs) and pyrrolizidine alkaloids (PAs). Emphasis is on the chemical ecology of both groups of alkaloids, which serve as general defense compounds against herbivores for the plants producing them. For QAs and PAs, a number of insects (aphids, moths, beetles) have acquired tolerance. Read More

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http://dx.doi.org/10.1007/s10886-018-1005-6DOI Listing
August 2018
2 Reads