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Journal of Chemical Ecology

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https://www.readbyqxmd.com/read/28744733/arthropods-associate-with-their-red-wood-ant-host-without-matching-nestmate-recognition-cues
#1
Thomas Parmentier, Wouter Dekoninck, Tom Wenseleers
Social insect colonies provide a valuable resource that attracts and offers shelter to a large community of arthropods. Previous research has suggested that many specialist parasites of social insects chemically mimic their host in order to evade aggression. In the present study, we carry out a systematic study to test how common such chemical deception is across a group of 22 arthropods that are associated with red wood ants (Formica rufa group). In contrast to the examples of chemical mimicry documented in some highly specialized parasites in previous studies, we find that most of the rather unspecialized red wood ant associates surveyed did not use mimicry of the cuticular hydrocarbon recognition cues to evade host detection...
July 26, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28744732/medicago-truncatula-oleanolic-derived-saponins-are-correlated-with-caterpillar-deterrence
#2
Fanping Cai, Bonnie S Watson, David Meek, David V Huhman, Daniel J Wherritt, Cecile Ben, Laurent Gentzbittel, Brian T Driscoll, Lloyd W Sumner, Jacqueline C Bede
Plant resistance mechanisms to insect herbivory can potentially be bred into crops as an important strategy for integrated pest management. Medicago truncatula ecotypes inoculated with the rhizobium Ensifer medicae (Sinorhizobium medica) WSM419 were screened for resistance to herbivory by caterpillars of the beet armyworm, Spodoptera exigua, through leaf and whole plant choice studies; TN1.11 and F83005.5 are identified as the least and most deterrent ecotypes, respectively. In response to caterpillar herbivory, both ecotypes mount a robust burst of plant defensive jasmonate phytohormones...
July 25, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28744731/plant-community-chemical-composition-influences-trembling-aspen-populus-tremuloides-intake-by-sheep
#3
Kristen Y Heroy, Samuel B St Clair, Elizabeth A Burritt, Juan J Villalba
Nutrients and plant secondary compounds in aspen (Populus tremuloides) may interact with nutrients in the surrounding vegetation to influence aspen use by herbivores. Thus, this study aimed to determine aspen intake and preference by sheep in response to supplementary nutrients or plant secondary compounds (PSC) present in aspen trees. Thirty-two lambs were randomly assigned to one of four molasses-based supplementary feeds to a basal diet of tall fescue hay (N = 8) during three experiments. The supplements were as follows: (1) high-protein (60% canola meal), (2) a PSC (6% quebracho tannins), (3) 25% aspen bark, and (4) control (100% molasses)...
July 25, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28735421/ammonia-released-by-streptomyces-aburaviensis-induces-droplet-formation-in-streptomyces-violaceoruber
#4
Kathrin Schmidt, Dieter Spiteller
Streptomyces violaceoruber grown in co-culture with Streptomyces aburaviensis produces an about 17-fold higher volume of droplets on its aerial mycelium than in single-culture. Physical separation of the Streptomyces strains by either a plastic barrier or by a dialysis membrane, which allowed communication only by the exchange of volatile compounds or diffusible compounds in the medium, respectively, still resulted in enhanced droplet formation. The application of molecular sieves to bioassays resulted in the attenuation of the droplet-inducing effect of S...
July 22, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28711978/the-activity-of-the-antioxidant-defense-system-of-the-weed-species-senna-obtusifolia-l-and-its-resistance-to-allelochemical-stress
#5
Érica Marusa Pergo Coelho, Mauro Cezar Barbosa, Márcio Shigueaki Mito, Gislaine Cristiane Mantovanelli, Rubem Silvério Oliveira, Emy Luiza Ishii-Iwamoto
Senna obtusifolia L., a common weed in the tropical and subtropical regions of the world, is able to germinate under adverse environmental conditions, suggesting that this species has efficient stress-adaptation strategies. The aims of the present work were to examine the energy metabolism and the antioxidant defense system of the Senna obtusifolia L. during seed germination and initial growth, and the responses to allelochemical-induced stress. Respiratory activity, the activities of alcohol dehydrogenase (ADH), superoxide dismutase (SOD), catalase (CAT),guaicol peroxidase (POD), ascorbate peroxidase (APX), glutathione reductase (GR), lipoxygenase (LOX) and the content of malondialdehyde (MDA) and glutathione (GSSG and GSH) were measured...
July 15, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28695387/the-role-of-leaf-volatiles-of-ludwigia-octovalvis-jacq-raven-in-the-attraction-of-altica-cyanea-weber-coleoptera-chrysomelidae
#6
Saubhik Mitra, Amarnath Karmakar, Abhishek Mukherjee, Anandamay Barik
Larvae and adults of Altica cyanea (Weber) (Coleoptera: Chrysomelidae) feed on the rice-field weed Ludwigia octovalvis (Jacq.) Raven (Onagraceae), commonly known as willow primrose, which is considered a biocontrol agent of the weed. Volatile organic compounds from undamaged plants, plants after 4, 12, and 36 h of continuous feeding by A. cyanea larvae or adult females and after mechanical damaging were identified by GC-MS and GC-FID analyses. Twenty nine compounds were identified from undamaged plants. 2Z-Penten-1-ol, geraniol, and 1-tridecanol were present in all plants damaged by larvae...
July 10, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28689277/identification-of-the-aggregation-sex-pheromone-produced-by-male-monochamus-saltuarius-a-major-insect-vector-of-the-pine-wood-nematode
#7
Hyo-Rim Lee, Sung-Chan Lee, Dong Ha Lee, Won-Sil Choi, Chan-Sik Jung, Jae-Ho Jeon, Jeong-Eun Kim, Il-Kwon Park
In this study, we isolated and identified an aggregation-sex pheromone from Monochamus saltuarius, the major insect vector of the pine wood nematode in Korea. Adult males of M. saltuarius produce 2-undecyloxy-1-ethanol, which is known as an aggregation-sex pheromone in other Monochamus species. We performed field experiments to determine the attractiveness of the pheromone and other synergists. More M. saltuarius adult beetles were attracted to traps baited with the pheromone than to unbaited traps. Ethanol and (-)-α-pinene interacted synergistically with the pheromone...
July 8, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28674827/evaluation-of-host-derived-volatiles-for-trapping-culicoides-biting-midges-diptera-ceratopogonidae
#8
Elin Isberg, Daniel Peter Bray, Ylva Hillbur, Rickard Ignell
Culicoides biting midges (Diptera: Ceratopognidae) cause pain and distress through blood feeding, and transmit viruses that threaten both animal and human health worldwide. There are few effective tools for monitoring and control of biting midges, with semiochemical-based strategies offering the advantage of targeting host-seeking populations. In previous studies, we identified the host preference of multiple Culicoides species, including Culicoides impunctatus, as well as cattle-derived compounds that modulate the behavioral responses of C...
July 3, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28674826/conifer-diterpene-resin-acids-disrupt-juvenile-hormone-mediated-endocrine-regulation-in-the-indian-meal-moth-plodia-interpunctella
#9
Hyun-Woo Oh, Chan-Seok Yun, Jun Hyoung Jeon, Ji-Ae Kim, Doo-Sang Park, Hyung Won Ryu, Sei-Ryang Oh, Hyuk-Hwan Song, Yunhee Shin, Chan Sik Jung, Sang Woon Shin
Diterpene resin acids (DRAs) are important components of oleoresin and greatly contribute to the defense strategies of conifers against herbivorous insects. In the present study, we determined that DRAs function as insect juvenile hormone (JH) antagonists that interfere with the juvenile hormone-mediated binding of the JH receptor Methoprene-tolerant (Met) and steroid receptor coactivator (SRC). Using a yeast two-hybrid system transformed with Met and SRC from the Indian meal moth Plodia interpunctella, we tested the interfering activity of 3704 plant extracts against JH III-mediated Met-SRC binding...
July 3, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28667548/synthetic-co-attractants-of-the-aggregation-pheromone-of-the-date-palm-root-borer-oryctes-agamemnon
#10
Narjes Hasni, Centina Pinier, Cheraief Imed, Monêem Ouhichi, Philippe Couzi, Brahim Chermiti, Brigitte Frérot, Imen Saïd, Didier Rochat
Laboratory and field investigations to identify and evaluate plant co-attractants of the aggregation pheromone of the date palm pest Oryctes agamemnon are reported. Volatiles emitted by freshly cut palm core and palm core with feeding males, were collected, analyzed by gas chromatography coupled to mass spectrometry and evaluated in olfactometers alone or combined with synthetic pheromone. A collection of palm odor without male effluvia was attractive alone and enhanced attraction to synthetic pheromone in an olfactometer similar to that to a collection of palm odor emitted with feeding males and containing natural pheromone...
June 30, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28647840/interaction-of-ferulic-acid-with-glutathione-s-transferase-and-carboxylesterase-genes-in-the-brown-planthopper-nilaparvata-lugens
#11
Jun Yang, Xiao-Qin Sun, Shu-Ying Yan, Wen-Jun Pan, Mao-Xin Zhang, Qing-Nian Cai
Plant phenolics are crucial defense phytochemicals against herbivores and glutathione S-transferase (GST) and carboxylesterase (CarE) in herbivorous insects are well-known detoxification enzymes for such xenobiotics. To understand relationship between a plant phenolic and herbivore GST or CarE genes, we evaluated the relationship between a rice phenolic ferulic acid and resistance to brown planthopper (BPH, Nilaparvata lugens), and investigated the interaction of ferulic acid with GST or CarE genes in BPH. The results indicate that ferulic acid content in tested rice varieties was highly associated with resistance to BPH...
June 24, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28536987/sexual-deception-in-the-eucera-pollinated-ophrys-leochroma-a-chemical-intermediate-between-wasp-and-andrena-pollinated-species
#12
Monica Cuervo, Demetra Rakosy, Carlos Martel, Stefan Schulz, Manfred Ayasse
Ophrys flowers mimic sex pheromones of attractive females of their pollinators and attract males, which attempt to copulate with the flower and thereby pollinate it. Virgin females and orchid flowers are known to use the same chemical compounds in order to attract males. The composition of the sex pheromone and its floral analogue, however, vary between pollinator genera. Wasp-pollinated Ophrys species attract their pollinators by using polar hydroxy acids, whereas Andrena-pollinated species use a mixture of non-polar hydrocarbons...
May 23, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28500568/female-sex-pheromone-of-the-cone-moth-dioryctria-mendacella-investigation-of-synergism-between-type-i-and-type-ii-pheromone-components
#13
David R Hall, Dudley Farman, Juan C Domínguez, Juan A Pajares
Polyunsaturated hydrocarbons (Type II pheromone components) have been reported to be synergists for unsaturated acetates, alcohols or aldehydes (Type I components) in the sex pheromones of several species of Lepidoptera. However, there is some debate over whether the active components are the hydrocarbons themselves or more volatile degradation products. Extracts of pheromone glands of adult females of the cone moth, Dioryctria mendacella (Lepidoptera: Pyralidae), contain (Z,E)-9,11-tetradecadienyl acetate (ZE9,11-14:Ac) and at least ten times as much (Z,Z,Z,Z,Z)-3,6,9,12,15-pentacosapentaene (ZZZZZ3,6,9,12,15-25:H)...
May 12, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28478546/the-extended-community-level-effects-of-genetic-variation-in-foliar-wax-chemistry-in-the-forest-tree-eucalyptus-globulus
#14
Benjamin Gosney, Julianne O'Reilly-Wapstra, Lynne Forster, Carmen Whiteley, Brad Potts
Genetic variation in foundation trees can influence dependent communities, but little is known about the mechanisms driving these extended genetic effects. We studied the potential chemical drivers of genetic variation in the dependent foliar community of the focal tree Eucalyptus globulus. We focus on the role of cuticular waxes and compare the effects to that of the terpenes, a well-studied group of secondary compounds known to be bioactive in eucalypts. The canopy community was quantified based on the abundance of thirty-nine distinctive arthropod and fungal symptoms on foliar samples collected from canopies of 246 progeny from 13 E...
May 6, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28477139/caterpillar-induced-plant-volatiles-attract-adult-tortricidae
#15
D M Suckling, A M El-Sayed
Binary and ternary combinations of volatile organic compounds identified earlier from caterpillar-infested apple foliage caught more than one thousand individuals of both sexes of several adult tortricid leafroller species in several days of trials conducted in apple orchards in southern British Columbia. A series of combinations with phenylacetonitrile, benzyl alcohol, and/or 2-phenylethanol and acetic acid enabled substantial catches of both sexes of eye-spotted budmoth, Spilonota ocellana, oblique-banded leafroller, Choristoneura rosaceana and three-lined leafroller, Pandemis limitata...
May 6, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28466378/a-native-parasitic-plant-systemically-induces-resistance-in-jack-pine-to-a-fungal-symbiont-of-invasive-mountain-pine-beetle
#16
Jennifer G Klutsch, Ahmed Najar, Patrick Sherwood, Pierluigi Bonello, Nadir Erbilgin
Conifer trees resist pest and pathogen attacks by complex defense responses involving different classes of defense compounds. However, it is unknown whether prior infection by biotrophic pathogens can lead to subsequent resistance to necrotrophic pathogens in conifers. We used the infection of jack pine, Pinus banksiana, by a common biotrophic pathogen dwarf mistletoe, Arceuthobium americanum, to investigate induced resistance to a necrotrophic fungus, Grosmannia clavigera, associated with the mountain pine beetle, Dendroctonus ponderosae...
May 2, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28647839/do-bumble-bee-bombus-impatiens-queens-signal-their-reproductive-and-mating-status-to-their-workers
#17
Etya Amsalem, Mario Padilla, Paul M Schreiber, Naomi S Altman, Abraham Hefetz, Christina M Grozinger
Reproduction in social insect societies reflects a delicate balance between cooperation and conflict over offspring production, and worker reproduction is widespread even in species showing strong reproductive skew in favor of the queen. To navigate these conflicts, workers are predicted to develop the means to estimate the queen's fecundity - potentially through behavioral and/or chemical cues - and to adjust their reproduction to maximize their fitness. Here, we introduced bumble bee, Bombus impatiens, workers to queens of different mating and reproductive status and examined worker reproduction and expression levels of two genes which were previously shown to be sensitive to the presence of the queen, vitellogenin and Krüppel-homolog 1...
June 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28634722/three-novel-bile-alcohols-of-mature-male-sea-lamprey-petromyzon-marinus-act-as-chemical-cues-for-conspecifics
#18
Ke Li, Anne M Scott, Joseph J Riedy, Skye Fissette, Zoe E Middleton, Weiming Li
Sea lamprey, Petromyzon marinus, rely heavily on chemical cues that mediate their life history events, such as migration and reproduction. Here, we describe petromyzone A-C (1-3), three novel bile alcohols that are highly oxidized and sulfated, isolated from water conditioned with spermiated male sea lamprey. Structures of these compounds were unequivocally established by spectroscopic analyses and by comparison with spectra of known compounds. Electro-olfactogram recordings showed that 1 at 10(-11) M was stimulatory to the adult sea lamprey olfactory epithelium, while 2 and 3 were stimulatory at 10(-13) M...
June 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28620771/oviposition-preference-for-young-plants-by-the-large-cabbage-butterfly-pieris-brassicae-does-not-strongly-correlate-with-caterpillar-performance
#19
Minghui Fei, Jeffrey A Harvey, Yi Yin, Rieta Gols
The effects of temporal variation in the quality of short-lived annual plants on oviposition preference and larval performance of insect herbivores has thus far received little attention. This study examines the effects of plant age on female oviposition preference and offspring performance in the large cabbage white butterfly Pieris brassicae. Adult female butterflies lay variable clusters of eggs on the underside of short-lived annual species in the family Brassicaceae, including the short-lived annuals Brassica nigra and Sinapis arvensis, which are important food plants for P...
June 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28601940/the-male-produced-aggregation-pheromone-of-a-strawberry-sap-beetle-lobiopa-insularis-coleoptera-nitidulidae
#20
Antonioni A C Moliterno, Camila B C Martins, Daiane Szczerbowski, Maria Aparecida C Zawadneak, Paulo H G Zarbin
The nitidulid beetle Lobiopa insularis is an important pest of strawberry crops in the United States and Brazil. Both larvae and adults feed on ripe strawberries, causing 20-70% loss in production during serious infestations. Aiming at the development of efficient, clean, and highly specific pest management systems, semiochemicals, especially pheromones, are particularly useful. Analyses of the extracts of both males and females obtained from aeration of live beetles showed the presence of three male specific compounds, 2-nonanone, 2-undecanone, and 2-undecanol (in an enantiomeric ratio of S:R = 3...
June 2017: Journal of Chemical Ecology
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