Journal of Chemical Ecology最新文献_第5页

Machine Learning Predicts Non-Preferred and Preferred Vertebrate Hosts of Tsetse Flies (Glossina spp.) Based on Skin Volatile Emission Profiles. 基于皮肤挥发性释放谱的机器学习预测采采蝇（Glossina spp.）非首选和首选脊椎动物宿主。

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-03-07 DOI: 10.1007/s10886-025-01582-6

Olabimpe Y Orubuloye, David P Tchouassi, Abdullahi A Yusuf, Christian W W Pirk, Daniel K Masiga, Edward Kariuki, Baldwyn Torto

{"title":"Machine Learning Predicts Non-Preferred and Preferred Vertebrate Hosts of Tsetse Flies (Glossina spp.) Based on Skin Volatile Emission Profiles.","authors":"Olabimpe Y Orubuloye, David P Tchouassi, Abdullahi A Yusuf, Christian W W Pirk, Daniel K Masiga, Edward Kariuki, Baldwyn Torto","doi":"10.1007/s10886-025-01582-6","DOIUrl":"10.1007/s10886-025-01582-6","url":null,"abstract":"Tsetse fly vectors of African trypanosomosis preferentially feed on certain vertebrates largely determined by olfactory cues they emit. Previously, we established that three skin-derived ketones including 6-methyl-5-hepten-2-one, acetophenone and geranyl acetone accounted for avoidance of zebra by tsetse flies. Here, we tested the hypothesis that these three ketones serve as biomarkers for tsetse flies to distinguish between non-preferred- and preferred-vertebrate hosts. We used coupled gas chromatography/mass spectrometry to analyze and compare the skin volatile emissions of two non-preferred- (waterbuck and zebra) and four preferred- (buffalo, donkey, horse, warthog) vertebrate hosts in two wildlife parks in Kenya. We detected a total of 96 volatile organic compounds (VOCs) in the skin emissions composed mainly of aldehydes, ketones, alcohols, phenols and alkanes, which varied with the vertebrate host. Using random forest analysis, we found a weak correlation between the three skin-odor repellent ketones and non-preferred and preferred vertebrate hosts. However, we found that the three repellent ketones plus skin background odors may be more sensitive chemical signals for tsetse flies to discriminate vertebrate hosts. These results contribute to understanding tsetse fly vertebrate host preferences in their natural habitat across geographic scales.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"30"},"PeriodicalIF":2.2,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11889071/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143573050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Nectar Composition and Nectar Yeasts on Volatile Emissions and Parasitoid Behavior. 花蜜成分和蜜酵母对挥发物排放和寄生蜂行为的影响。

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-03-06 DOI: 10.1007/s10886-025-01587-1

Islam S Sobhy, Tim Goelen, Felix Wäckers, Kevin J Verstrepen, Tom Wenseleers, Hans Jacquemyn, Bart Lievens

{"title":"Impact of Nectar Composition and Nectar Yeasts on Volatile Emissions and Parasitoid Behavior.","authors":"Islam S Sobhy, Tim Goelen, Felix Wäckers, Kevin J Verstrepen, Tom Wenseleers, Hans Jacquemyn, Bart Lievens","doi":"10.1007/s10886-025-01587-1","DOIUrl":"10.1007/s10886-025-01587-1","url":null,"abstract":"Nectar yeasts can significantly influence the scent of floral nectar and therefore the foraging behavior of flower-visiting insects. While these effects likely depend on nectar chemistry and yeast species, their joint impact on nectar volatile profiles and associated insect responses remain poorly understood. Here, we used four synthetic nectar types varying in sugar and amino acid concentration and two specialist nectar yeasts (Metschnikowia gruessii and Metschnikowia reukaufii) to investigate how nectar composition and yeast species affect volatile profiles and the olfactory responses of the generalist aphid parasitoid Aphidius ervi. Olfactometer assays showed that A. ervi females significantly preferred fermented nectars with high amino acid-low sugar content (HL) and low amino acid-high sugar (LH) content, regardless being fermented by M. gruessii or M. reukaufii, over non-inoculated nectars. This effect was not observed for nectars with low amino acid-low sugar (LL) and high amino acid-high sugar (HH) content. Moreover, LL nectar fermented with M. gruessii became even repellent to the parasitoids. GC-MS analysis of volatile organic compounds (VOCs) revealed that VOC profiles of fermented nectars depended significantly on nectar type (i.e., chemical composition), yeast species, and their interaction. Whereas propyl acetate, isobutyl acetate, styrene, α-guaiene and pentyl-octanoate were associated with the LH fermented nectars, ethyl acetate and E-methyl isoeugenol were mainly associated with the HL fermented nectars, suggesting possible involvement in A. ervi attraction to these nectars. In contrast, isopropyl-hexadecanoate was associated with the non-attractive or repellent LL fermented nectars. Altogether, our results indicate that nectar composition has a strong impact on nectar scent when fermented by specialist nectar yeasts and subsequently on insect foraging behavior.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"29"},"PeriodicalIF":2.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11885403/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143567316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antennal Responses to Volatiles Related to Host Location in the Ambrosia Beetle Platypus quercivorus (Murayama). 黄斑鸭嘴兽（Ambrosia Beetle Platypus quercivorus）对寄主位置相关挥发物的触角响应。

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-02-25 DOI: 10.1007/s10886-025-01580-8

Ryuichi Okada, Yasuto Ito, Michimasa Yamasaki

{"title":"Antennal Responses to Volatiles Related to Host Location in the Ambrosia Beetle Platypus quercivorus (Murayama).","authors":"Ryuichi Okada, Yasuto Ito, Michimasa Yamasaki","doi":"10.1007/s10886-025-01580-8","DOIUrl":"10.1007/s10886-025-01580-8","url":null,"abstract":"The ambrosia beetle Platypus quercivorus (Murayama) is a vector of Japanese oak wilt, a fungal pathogen that causes mass mortality of Fagaceae trees. The male locates and lands on the host tree and releases an aggregation pheromone that attracts both males and females. Thus, aggregation pheromones and host tree volatiles are important chemicals for host location. However, the antennal responses to these volatiles have not yet been examined. To obtain physiological property of P. quercivorus antennae, we electrophysiologically recorded the antennal responses of this beetle to candidate volatiles, including isoprene and other leaf volatiles (1-hexanol, 2-ethyl-1-hexanol, trans-2-hexenal, decanal, and benzaldehyde) of the host trees, as well as quercivorol (aggregation pheromone) and ethanol (widely used for trapping this insect in the field). Electroantennograms (EAGs) exhibited clear dose-dependent responses to the tested volatiles, but antennae did not respond to decanal. Sexual differences in responses were not observed for almost all volatiles. However, the EAGs suggested that the quercivorol and trans-2-hexenal sensitivity of males was higher than that of females. Ethanol elicited a large EAG amplitude in both sexes, but the sensitivity of males or females to ethanol was lower than that to the other volatiles. EAGs showed a very weak response to isoprene only in males, although isoprene is considered a possible attractant for host location. Our study will facilitate to understand the mechanism of the host location ecologically and neurophysiologically.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"27"},"PeriodicalIF":2.2,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143492044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fungal alkaloids mediate defense against bruchid beetles in field populations of an arborescent ipomoea. 真菌生物碱介导了一种乔木瓢虫田间种群对野瓢虫的防御。

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-02-25 DOI: 10.1007/s10886-025-01578-2

Alberto Prado, Susana Pineda-Solis, Roberto Garibay-Orijel, Donald Windsor, Jean-Luc Boevé

{"title":"Fungal alkaloids mediate defense against bruchid beetles in field populations of an arborescent ipomoea.","authors":"Alberto Prado, Susana Pineda-Solis, Roberto Garibay-Orijel, Donald Windsor, Jean-Luc Boevé","doi":"10.1007/s10886-025-01578-2","DOIUrl":"10.1007/s10886-025-01578-2","url":null,"abstract":"Several Convolvulaceae species harbor heritable fungal endophytes from which alkaloids are translocated to reproductive tissues of the plant host. Evidence for the distribution and ecological role of these fungal alkaloids, however, is lacking or incomplete for many host species and growth forms. Here we report on the identity of the fungal endophytes and quantities of alkaloids present in the leaves and seeds of the arborescent morning glory, Ipomoea murucoides (Convolvulaceae). Young folded leaf samples taken from the wild, harbored mycelium of one of two fungal taxa wrapped around the leaves' glandular trichomes. Most trees harbored the swainsonine producing Ceramothyrium (Chaetothyriales) fungi while a few trees were found to harbor a Truncatella (Xylariales) species, suggesting endophyte replacement. Seeds had higher concentrations of the indolizidine alkaloid swainsonine than leaves. Additionally, seeds from trees harboring Ceramothyrium fungi exhibited less bruchid damage and had higher concentrations of swainsonine than seeds from trees harboring Truncatella fungi. Five sesquiterpenes were detected in the leaf trichomes in both Ceramothyrium and Truncatella colonized trees. The seed content of the tropane alkaloids, tropine and tropinone, did not differ significantly among the two fungal symbionts. It is likely that the host allocates the defensive chemicals from leaves to seeds, protecting them from seed predators such as bruchid beetles. Overall, our field data show that Ipomoea species provides an interesting opportunity to study vertical and horizontal fungal symbiont transmissions.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"26"},"PeriodicalIF":2.2,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11850502/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143492046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functional Characterization of a Female-Biased Chemoreceptor of the Codling Moth (Cydia pomonella) Responding to Aldehydes and Other Volatile Compounds. 冷蛾（Cydia pomonella）对醛类和其他挥发性化合物反应的雌性偏向性化学受体的功能表征。

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-02-25 DOI: 10.1007/s10886-025-01579-1

Alberto Maria Cattaneo, Charles A Kwadha, Heidi Pullmann-Lindsley, Anna L Erdei, R Jason Pitts, William B Walker

{"title":"Functional Characterization of a Female-Biased Chemoreceptor of the Codling Moth (Cydia pomonella) Responding to Aldehydes and Other Volatile Compounds.","authors":"Alberto Maria Cattaneo, Charles A Kwadha, Heidi Pullmann-Lindsley, Anna L Erdei, R Jason Pitts, William B Walker","doi":"10.1007/s10886-025-01579-1","DOIUrl":"10.1007/s10886-025-01579-1","url":null,"abstract":"With the advent of semiochemical-based control strategies used to mitigate damage of agricultural pest moths, many studies have focused on the function of male-specific putative pheromone receptors (PRs). In this investigation, we instead isolated, heterologously expressed, and functionally characterized a female-biased candidate PR, CpomOR22, from the codling moth, Cydia pomonella. Using transgenic Drosophila melanogaster for single sensillum recording (SSR) and gas-chromatographic SSR, we tested both synthetic ligands and various apple headspace extracts, identifying saturated and unsaturated aldehydes (nonanal, decanal, undecanal, dodecanal; (Z)-4-undecenal and (Z)-6-undecenal) among the most active ligands. Parallel experiments expressing CpomOR22 in Xenopus oocytes confirmed the binding of nonanal, decanal and undecanal and revealed lactones (γ-undecalactone and δ-dodecalactone) and several carboxylic acids as additional active compounds. The renowned ecological importance of aldehydes for the codling moth and the potential for newly identified ligands, such as lactones, may inform innovative control strategies based on novel semiochemicals to interfere with the female-specific chemosensory systems of this insect.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"28"},"PeriodicalIF":2.2,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11861427/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143501536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Insights into the Composition of Aggregation Pheromones in Polygraphus poligraphus, Polygraphus punctifrons, Polygraphus subopacus and Polygraphus proximus. 多笔、点笔、次笔和近笔聚集信息素组成的新认识。

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-02-07 DOI: 10.1007/s10886-025-01577-3

Lina Viklund, Joakim Bång, Martin Schroeder, Erik Hedenström

{"title":"New Insights into the Composition of Aggregation Pheromones in Polygraphus poligraphus, Polygraphus punctifrons, Polygraphus subopacus and Polygraphus proximus.","authors":"Lina Viklund, Joakim Bång, Martin Schroeder, Erik Hedenström","doi":"10.1007/s10886-025-01577-3","DOIUrl":"10.1007/s10886-025-01577-3","url":null,"abstract":"Four-eyed bark beetles of the genus Polygraphus have been involved in large bark beetle outbreaks in different parts of the world, resulting in major economic losses. A striking example is the invasive species Polygraphus proximus which is a pest on Abies sibirica in Russia. In Sweden, Polygraphus poligraphus has been involved in bark beetle outbreaks on Norway spruce, Picea abies, together with the European spruce bark beetle Ips typographus. Two related species, Polygraphus punctifrons and Polygraphus subopacus are also present in Sweden. Recently, aggregation pheromones or pheromone components have been identified for these four Polygraphus species. However, questions remain regarding the complete composition of their pheromones, particularly for P. subopacus and P. proximus, whose aggregation pheromones appear to be very similar. In an attempt to better understand the chemical communication of these species, additional studies were conducted on P. poligraphus, P. punctifrons and P. subopacus using solid phase microextraction coupled with gas chromatography and mass spectrometry (SPME-GC-MS), electroantennography (EAG) as well as SPME-GC-MS and GC-MS with electroantennographic detection (EAD). Field experiments were also conducted. In P. punctifrons, some male-specific compounds were found in addition to those previously identified. In EAG and SPME-GC-MS/EAD studies, all three Polygraphus species responded strongly to grandisol. Using a chiral column, GC-MS/EAD revealed that they were able to detect both enantiomers of grandisol. In summary, this work presents our current understanding of the aggregation pheromones in four Polygraphus species and the challenges we have met in identifying species-specific pheromone blends for some of these species.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 1","pages":"25"},"PeriodicalIF":2.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11805885/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143364855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differential Attraction of Summer and Winter Morphs of Spotted Wing Drosophila, Drosophila suzukii, to Yeasts. 苏氏斑翅果蝇夏、冬型对酵母菌的差异吸引。

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-02-05 DOI: 10.1007/s10886-025-01561-x

Rory Jones, Matthew R Goddard, Paul E Eady, David R Hall, Daniel P Bray, Dudley I Farman, Michelle T Fountain

{"title":"Differential Attraction of Summer and Winter Morphs of Spotted Wing Drosophila, Drosophila suzukii, to Yeasts.","authors":"Rory Jones, Matthew R Goddard, Paul E Eady, David R Hall, Daniel P Bray, Dudley I Farman, Michelle T Fountain","doi":"10.1007/s10886-025-01561-x","DOIUrl":"10.1007/s10886-025-01561-x","url":null,"abstract":"Drosophila suzukii is a pest of soft and stone fruits that is attracted to yeast volatile metabolites. Drosophila suzukii has distinct summer and winter morphs which are found in different habitats. Complex communities of yeasts likely differ between habitats and thus we hypothesized morphs differ in their attraction to yeast volatiles from different species and combinations of species. We presented D. suzukii with yeast species in isolation and in combinations, as either post-culture mixes or co-cultured, and measured activity of the flies in laboratory choice tests with a Locomotor Activity Monitor as a proxy for attraction. Candida zemplinina was more attractive to winter than summer morphs when cultured in both sterile strawberry juice (SSJ) and artificial culture media (YPD). No significant correlations were found between principle component scores derived from single yeast volatile profiles and fly activity. There was also differential attraction of morphs to certain yeast mixes, most notably post SSJ culture mixes of Hanseniaspora uvarum and C. zemplinina were consistently more attractive to winter morphs. Mixtures of Metschnikowia pulcherrima + Pichia pijperi + H. uvarum in SSJ and M. pulcherrima + P. pijperi yeasts in YPD were also preferred by winter morphs, whilst summer morphs were attracted to SSJ co-cultures of M. pulcherrima + H. uvarum. However, co-culturing yeasts did not enhance attraction compared to post-culture mixes of constituent yeasts for either morph. Differential attraction of morphs to certain yeasts suggests options for new bait formulations in integrated pest management strategies may be tailored to better target morphs.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 1","pages":"23"},"PeriodicalIF":2.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799104/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143189167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discovery and Field Evaluation of Sex Pheromone Components for the Click Beetle Melanotus verberans (LeConte) (Coleoptera: Elateridae). 发现和实地评估咔哒甲虫 Melanotus verberans (LeConte) (Coleoptera: Elateridae) 的性信息素成分。

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-02-05 DOI: 10.1007/s10886-025-01569-3

Livy Williams Iii, Sean T Halloran, Paul D Baker, Frank E Etzler, Lance L Lawrence, Jocelyn G Millar

{"title":"Discovery and Field Evaluation of Sex Pheromone Components for the Click Beetle Melanotus verberans (LeConte) (Coleoptera: Elateridae).","authors":"Livy Williams Iii, Sean T Halloran, Paul D Baker, Frank E Etzler, Lance L Lawrence, Jocelyn G Millar","doi":"10.1007/s10886-025-01569-3","DOIUrl":"10.1007/s10886-025-01569-3","url":null,"abstract":"Wireworms, the larval stage of elaterid beetles, are among the most serious soil-borne insect pests in the world. Wireworms feed on a variety of key crops, including small grains, maize, vegetables, fruits, sugar cane, sugar beets, potatoes, and sweet potatoes. Management of these pests is becoming increasingly problematic, in part due to knowledge gaps in their basic biology, which hinders development of effective crop protection strategies. In particular, little is known about the semiochemicals that mediate the reproductive behavior of these pests. Research over the past two decades has begun to fill this need, with: (1) the discovery of sex attractants for several key pest species, and (2) subsequent studies toward development of semiochemically-based pest management approaches. We used chemical and behavioral studies to identify, synthesize, and field test the sex attractant pheromone of adult Melanotus verberans, the larvae of which are important crop pests. In coupled gas chromatography-mass spectrometry analyses of extracts of ovipositors of females, five possible pheromone components were identified. Subsequent coupled gas chromatography-electroantennogram detection analyses indicated that male antennae were responsive to only two of these compounds, 13-tetradecenyl acetate and 13-tetradecenyl hexanoate. In field trials, neither compound alone was attractive, but a blend of the two was strongly attractive to conspecific male beetles, and did not attract other species. A two-year field study showed that most male beetle flight activity occurred from April through May. Because the sex pheromone of M. verberans consists of two compounds that can be readily synthesized, its development for integrated pest management should be economically feasible.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 1","pages":"24"},"PeriodicalIF":2.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799071/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143189181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pheromone Composition of the Eastern Larch Beetle Dendroctonus simplex Leconte (Coleoptera: Curculionidae): Quantitative Analyses and Olfactory Responses. 东方落叶松甲虫（鞘翅目：松毛虫科）信息素组成的定量分析与嗅觉反应。

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-02-04 DOI: 10.1007/s10886-025-01575-5

Emily R Althoff, Brian H Aukema, Brian T Sullivan

{"title":"Pheromone Composition of the Eastern Larch Beetle Dendroctonus simplex Leconte (Coleoptera: Curculionidae): Quantitative Analyses and Olfactory Responses.","authors":"Emily R Althoff, Brian H Aukema, Brian T Sullivan","doi":"10.1007/s10886-025-01575-5","DOIUrl":"10.1007/s10886-025-01575-5","url":null,"abstract":"The eastern larch beetle, Dendroctonus simplex LeConte, colonizes tamarack, Larix laricina (Du Roi) K. Koch, and has become a major tree killer in parts of its temperate North American range. To fill existing gaps in knowledge of this insect's pheromone system, we used gas chromatography-mass spectrometry to perform quantitative studies of pheromone production by unfed beetles of both sexes, founding females excised from newly established galleries in a tamarack log, and both sexes excised post-pairing. To identify olfactory stimulants and thereby possible, additional pheromone components, we performed gas chromatography-electroantennographic detection analyses with antennae of both sexes exposed to volatiles collections from the beetles. We also exposed unfed male and female beetles to juvenile hormone III (JH III) to identify pheromone components regulated through this mechanism. Both female and male beetles exhibited antennal responses to 1,5-dimethyl-6,8-dioxabicyclo[3.2.1]octane (frontalin), 3-methylcyclohex-2-en-1-ol (seudenol), and 3-methylcyclohex-2-en-1-one (MCH) in volatiles of solitary mining females. Within approximately 24 h of joining a male, female production of seudenol and MCH largely ceased while production of frontalin continued. Unfed females produced no more than minute amounts of pheromone, and application of JH III induced production of frontalin from some females but not seudenol or MCH. Unfed males and males exposed to JH III produced almost no volatiles, whereas paired males produced minute amounts of frontalin (possibly an artifact), no seudenol or MCH, and some oxygenated monoterpenes. We found that timing of production of certain pheromone components was inconsistent with their known activity.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 1","pages":"18"},"PeriodicalIF":2.2,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143189282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regionality and Temporal Dynamics of Sequestration and Relocation of Cardenolides in the Monarch Butterfly, Danaus plexippus. 帝王斑蝶体内钙化醇类化合物的区域性和时间动态变化

IF 2.2 3区环境科学与生态学

Journal of Chemical Ecology Pub Date : 2025-02-04 DOI: 10.1007/s10886-025-01572-8

Anja Betz, Birgit Höglinger, Frank Walker, Georg Petschenka

{"title":"Regionality and Temporal Dynamics of Sequestration and Relocation of Cardenolides in the Monarch Butterfly, Danaus plexippus.","authors":"Anja Betz, Birgit Höglinger, Frank Walker, Georg Petschenka","doi":"10.1007/s10886-025-01572-8","DOIUrl":"10.1007/s10886-025-01572-8","url":null,"abstract":"The adaptation of monarch butterflies (Danaus plexippus) to milkweed plants and their ability to sequester toxic cardenolides is a model system for plant-herbivore coevolution. However, the physiological mechanisms underlying cardenolide sequestration and its temporal dynamics remain largely unknown. Here, we show that the polar cardenolide ouabain passes through the isolated midgut epithelium of D. plexippus in vitro and is also absorbed into the body cavity of monarch caterpillars. Remarkably, the same pattern was observed in caterpillars of the related, but non-sequestering milkweed butterfly Euploea core, and even in the non-adapted Solanaceae specialist Manduca sexta, although uptake across gut epithelia occurred at a lower rate. Furthermore, we demonstrated that cardenolides begin to cross the epithelium in the anterior part of the intestine and can be detected in body tissues as soon as one minute after ingestion. Finally, we show that not all cardenolides are translocated into butterfly tissues during metamorphosis, and that the most apolar cardenolides are removed with the last caterpillar exuviae. As a result, adult butterflies contain no cardenolides less polar than the milkweed cardenolide calactin. We conclude that uptake by the intestinal epithelium is a very rapid process and that quantitative differences in cardenolide sequestration among lepidopteran caterpillars are only partially mediated by the gut epithelium, likely involving additional mechanisms such as metabolism or excretion. In addition, the translocation of cardenolides from the caterpillar is a selective process which may be due to the limited mobility of highly apolar cardenolides.","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 1","pages":"19"},"PeriodicalIF":2.2,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11794346/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143189264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0