Journal of Chemical Ecology最新文献

{"title":"Microbial Interactions Influence the Chemical Defense of Wild and Cultivated Tomato Species.","authors":"Dimitri Orine, Haymanti Saha, Gaetan Glauser, Arjen Biere, Sergio Rasmann","doi":"10.1007/s10886-025-01598-y","DOIUrl":"10.1007/s10886-025-01598-y","url":null,"abstract":"<p><p>Tomato, a globally significant crop, faces continuous threats from pests and pathogens, necessitating alternative approaches to reduce chemical inputs. Beneficial soil microbes, such as arbuscular mycorrhizal fungi (AMF) and plant growth-promoting rhizobacteria (PGPR), offer promising solutions by enhancing plant growth and pest tolerance. However, domestication may have weakened tomatoes' interactions with these microbes, potentially compromising their innate immunity, a hypothesis that remains largely unexplored. To address this gap, we examined the effects of AMF and PGPR inoculation on growth, herbivory resistance, and metabolic responses in the domesticated Solanum lycopersicum 'Moneymaker' and three wild tomato relatives. Our findings reveal that microbial inoculation significantly influences both domesticated and wild tomatoes, with PGPR generally enhancing and AMF reducing plant growth across species. Using targeted and untargeted metabolomics, we found that soil microbes substantially alter plant chemistry above- and belowground in a species-specific manner. Notably, herbivore responses were more affected by AMF presence than by tomato species. These results highlight that while domestication has profoundly shaped tomato traits, microbial interactions can modulate these phenotypes. Thus, selecting microbial strains best suited to modern cultivars is crucial for optimizing plant growth and resilience against pests.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"47"},"PeriodicalIF":2.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143795590","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}

{"title":"Intercropping Alters Phytochemicals Associated With Insect Herbivory.","authors":"Jarrod Q Fyie, Chase A Stratton, William R Morrison, Ebony G Murrell","doi":"10.1007/s10886-025-01555-9","DOIUrl":"https://doi.org/10.1007/s10886-025-01555-9","url":null,"abstract":"<p><p>Given the multiple possible mechanisms for interspecific chemical interaction between adjacent heterospecific plants, phytochemical profiles, which include phytochemical defense compounds, of crop species could potentially be enhanced or altered by intercropping with phytochemically diverse neighbors. We assessed the influence of intercropping between phytochemically diverse plants on plant biomass and aerial volatile organic compound (VOC) emission profiles by intercropping sweetclover (Melilotus alba) and wheat (Triticum aestivum) with silflower (Silphium integrifolium) in AMF-inoculated soil. We also assessed the impact of intercropping on induced VOC profiles by conducting an in-situ, no-choice bioassay with fall armyworm (Spodoptera frugiperda). Of eight compound classes we identified across the three plant species, prenol lipids (terpenoids) were upregulated in silflower plants when monocropped with wheat and when herbivory was introduced. Carboxylic acids and organooxygen compounds were reduced in sweetclover when intercropped with silflower, but increased under herbivory. Uninfested wheat plants emitted more organooxygen compounds and fatty acyls than infested plants when intercropped with silflower, but not when monocropped. Wheat and sweetclover biomass increased when intercropped with silflower, but silflower biomass was unaffected by intercropping. This study showed that VOC emissions of plants from three diverse taxa are altered by both intercropping and herbivory in ways that may impact their resistance to insect herbivory. Further research into the role of intercropping on volatile profile emissions, and possible pest resistance in agroecological systems, could help farmers to design intercropping systems that optimize natural plant herbivory defenses, thus improving agricultural sustainability.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"46"},"PeriodicalIF":2.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143752948","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}

{"title":"Correction: Chemical Ecology and Management of the Small Hive Beetle, Aethina tumida (Coleoptera: Nitidulidae).","authors":"Bridget Bobadoye, Beatrice T Nganso, Charles Stuhl, Baldwyn Torto, Ayuka T Fombong","doi":"10.1007/s10886-025-01589-z","DOIUrl":"https://doi.org/10.1007/s10886-025-01589-z","url":null,"abstract":"","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"44"},"PeriodicalIF":2.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143700506","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}

{"title":"Cabbage Leaf Epicuticular Wax Deters Female Oviposition and Larval Feeding of Pieris rapae.","authors":"Itsuki Ueno, Taisei Kanedawara, Kodai Inoue, Sotaro Watanabe, Hisashi Ômura","doi":"10.1007/s10886-025-01597-z","DOIUrl":"10.1007/s10886-025-01597-z","url":null,"abstract":"<p><p>The small white butterfly Pieris rapae is a major pest of brassicaceous crops, causing extensive damage to cabbage Brassica oleraceae var. capitata. Pieris rapae utilizes glucosinolates, which are characteristic of brassicaceous plants, for host selection. However, the effect of epicuticular wax of cabbage leaves on host selection by P. rapae remains unclear. This study was aimed to determine the effects of leaf epicuticular wax on female oviposition and larval feeding of P. rapae. We used a common cabbage variety 'Kinkei 201' containing n-nonacosane as the predominant leaf wax component. Wax removal treatments, in which the leaf surface was rubbed with cotton balls, significantly increased female oviposition and mid-stage (2nd-4th instars) larval feeding compared with untreated (intact) leaves. Spraying treatments with n-nonacosane standard on wax-removed leaves significantly suppressed female oviposition and mid-stage larval feeding. Thus, n-nonacosane in cabbage leaf epicuticular wax potentially affects host selection and preference by P. rapae. In contrast, final-stage (5th instar) larvae significantly preferred intact leaves to wax-removed leaves, and spraying treatments with n-nonacosane did not significantly change their feeding on wax-removed leaves. This suggests that young larvae are more susceptible to wax feeding inhibition than older larvae and that increasing leaf wax content enhances the resistance of cabbage against P. rapae. Acquiring these traits in cabbage leaves through improved breeding and cultivation methods may reduce and control the oviposition and feeding damage by P. rapae.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"45"},"PeriodicalIF":2.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11937181/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143709999","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}

{"title":"Rainfall Promote Bruceine D Release from Brucea javanica Leaf Litter Thus Reducing Weeds and Enhancing Plant Competitiveness.","authors":"Yao Tong, Hai-Ou Lin, Dong-Qiang Zeng, Fa-Yang Xie, Wen-Wei Tang","doi":"10.1007/s10886-025-01596-0","DOIUrl":"https://doi.org/10.1007/s10886-025-01596-0","url":null,"abstract":"<p><p>Brucea javanica (L.) Merr. is a medicinal plant widely cultivated in tropical and subtropical regions, and under the B. javanica plantations region few weed species have been established. This study demonstrated that mulching with moistened B. javanica leaf powder inhibited the emergence of Bidens pilosa and Digitaria sanguinalis seedlings compared to the control, with the inhibitory effect being thickness-dependent. Among the four extracts (methanolic, M; petroleum ether, PE; ethyl acetate, EA; and n-butanol, n-B) of B. javanica leaf powder, both n-B and EA extracts showed significant inhibitory activity in laboratory and greenhouse experiments, which were correlated with their relatively high Bruceine D (BD) content. Further column leaching simulated rainfall demonstrated that decreased rainfall intensity could enhance the herbicidal activity of the B. javanica leaf powder against weed seedling emergence, which significantly coincided with the increased content of BD leached. Our results concluded that BD, may as the main phytotoxic compound in B. javanica leaf litter, could be leached into the soil by rainfall and interfere with the germination and growth of neighboring plants to help B. javanica gain an advantage in the particular habitat.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"43"},"PeriodicalIF":2.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143700508","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}

{"title":"Chemical Composition of Secretions from Facial Glands of Captive Hoary Bat (Lasiurus cinereus) in Virginia.","authors":"Kristina R Stefaniak, Lark Kellogg, Matthew T Close, Karen E Powers","doi":"10.1007/s10886-025-01593-3","DOIUrl":"10.1007/s10886-025-01593-3","url":null,"abstract":"<p><p>Our study represents the first known report of hoary bat (Lasiurus cinereus) facial gland histology and chemical characterization of facial gland secretions. While in captivity from October 2023 to February 2024, facial secretions of a male hoary bat were observed and collected. Gas chromatography-mass spectrometry (GC-MS) analysis of a methanol extraction of November 2023 samples identified 23 compounds after comparing retention times, mass spectra, and Kovats retention index. These compounds consisted of alkanes, alcohols, ketones, terpenoids, monoacylglycerols, and androgens. Of interest was the identification of five androstane derivatives, testosterone metabolites, that have not been seen previously in mammal secretions and indicate possible mating readiness. The chemical analyses from November swabs and histological examination of facial skin in February suggest that this male was actively secreting mate-signaling compounds throughout late fall and winter months. Anecdotal mating records on wintering grounds combined with this bat's warm captive environment likely allowed for this extended mating readiness for his many months at the wildlife center.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"42"},"PeriodicalIF":2.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11923032/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143663606","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}

{"title":"Discrimination of Methyl-Branched Hydrocarbons by Tetramorium tsushimae Ants: a Focus on Branch Position and Chain Length.","authors":"Masayuki Hayashi, Naofumi Ito, Jocelyn G Millar, Kiyoshi Nakamuta","doi":"10.1007/s10886-025-01595-1","DOIUrl":"https://doi.org/10.1007/s10886-025-01595-1","url":null,"abstract":"<p><p>In nature, organisms are exposed to scents and tastes composed of multiple rather than single chemicals. The ability to sense and correctly identify different chemicals within these complex mixtures is essential for optimized behavior. However, when minor variations in chemical structure do not significantly impact the organisms, a generalized response to similar chemicals without discrimination might be more adaptive. In this study, we investigated the ability of ants to discriminate among methyl-branched alkanes. Ants recognize each other using cuticular hydrocarbons (CHCs), typically composed of a mixture of n-alkanes, n-alkenes, and methyl-branched alkanes. Tetramorium tsushimae ants have been shown to use the methylalkane fraction of CHCs to identify their mutualistic partners. We measured the behavioral responses of ant workers to dummies coated with various hydrocarbons, after presenting them with dummies treated with methylalkanes and a sucrose solution as a reward. The results showed that ants previously exposed to 2-methyltetracosane (2-MeC24) decreased their aggression not only toward 2-MeC24 but also toward 2-MeC26, despite the difference in the chain lengths. Conversely, ants exposed to 13-MeC27 maintained high levels of aggression toward 5-MeC27, which has the methyl branch in a different position. These findings suggest that T. tsushimae ants can differentiate between methylalkanes with different methyl branch positions, but are less able to discriminate between those with the same methyl branch position but different chain lengths.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"41"},"PeriodicalIF":2.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143657454","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}

{"title":"Understanding your Biases in Collecting Organismal VOCs.","authors":"Lucas Seybert, Christophe Duplais","doi":"10.1007/s10886-025-01592-4","DOIUrl":"https://doi.org/10.1007/s10886-025-01592-4","url":null,"abstract":"<p><p>Volatile organic compounds (VOCs) play a fundamental role in organismal interactions, facilitating intra- and interspecific communications. Accurate collection and analysis of VOCs are essential for understanding these interactions, but the choice of collection methods and adsorbent materials can introduce biases. This study investigates the variability and recovery yield in VOC collection using various adsorbents and thin-film solid-phase microextraction (TF-SPME). We compared the performance of nine adsorbents and TF-SPME in capturing a standard VOC mixture and VOCs from rosemary plants. Results show significant differences in efficiency among adsorbents, with Porapak^® P generally providing the best recovery for most compounds. TF-SPME exhibited higher sensitivity and detected a broader range of volatiles compared to adsorbents, though qualitative profiles varied. Our findings underscore the importance of empirical testing in adsorbent selection and highlight the inherent biases in VOC collection methods. These insights aim to guide and empower researchers in making informed decisions regarding experimental design and data interpretation to achieve more accurate and reliable VOC results in chemical ecology studies.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"40"},"PeriodicalIF":2.2,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143630543","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}

{"title":"Fall Armyworm Frass Induce Sorghum Defenses Against Insect Herbivores.","authors":"Sanket Shinde, Edith Ikuze, Esha Kaler, Kashish Verma, Joe Louis","doi":"10.1007/s10886-025-01591-5","DOIUrl":"https://doi.org/10.1007/s10886-025-01591-5","url":null,"abstract":"<p><p>The fall armyworm (FAW; Spodoptera frugiperda) is a global invasive agricultural pest. Sorghum (Sorghum bicolor), an important monocot crop cultivated worldwide, faces significant challenges from FAW, which has become a major threat to sorghum production. Plants have evolved a wide array of defense mechanisms to combat insect assault. Caterpillar secretions contain both elicitors and effectors, which can either amplify or suppress plant defenses, thereby influencing plant defense responses. In this study, we examined the role of FAW frass in modulating sorghum defenses. Our results suggest that frass application significantly induced sorghum defenses that impacted subsequent FAW herbivory. We also found that the exogenous frass application significantly elevated the phytohormone levels, specifically jasmonic acid and abscisic acid levels, potentially contributing to enhanced sorghum defense against FAW. Furthermore, FAW frass-treated plants exhibited transient increase in total flavonoids, a class of secondary metabolites, which was previously shown to have a detrimental impact on FAW growth and survival. FAW frass application on sorghum plants mitigated proliferation of specialist aphids (sugarcane aphids), though its effect on generalist aphids (greenbugs) was less pronounced. These findings highlight the role of FAW frass in mediating plant responses against both chewing and piercing-sucking insect pests, providing valuable insights into sorghum's defense mechanisms and its potential for pest management strategies.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"39"},"PeriodicalIF":2.2,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143624841","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}

{"title":"Differential Responses of the Egg-Larval Parasitoid Chelonus Bifoveolatus To Fall Armyworm-Induced and Constitutive Volatiles of Diverse Maize Genotypes.","authors":"Collins O Onjura, Emmanuel Peter, George O Asudi, Michael M Gicheru, Samira A Mohamed, Toby J A Bruce, Amanuel Tamiru","doi":"10.1007/s10886-025-01585-3","DOIUrl":"10.1007/s10886-025-01585-3","url":null,"abstract":"<p><p>The fall armyworm (FAW), Spodoptera frugiperda, is a serious invasive crop pest and threat to food security. Conventional pest control approaches using chemical pesticides can lead to adverse environmental and human health problems calling for safer alternative pest management options. Volatile organic compounds (VOCs) released by plants constitutively and in response to herbivory have been shown to enhance ecologically benign biocontrol alternatives to chemical insecticides for pest management. However, genotypic variations in VOC emissions have also been reported for plant species including maize (Zea mays). Hence, a better insight into the variations in odor profiles of different maize varieties and their corresponding role in recruiting pests' natural enemies are crucial for developing a sustainable biocontrol strategy. Our present study assessed the behavioral responses of the FAW egg-larval parasitoid, Chelonus bifoveolatus (Braconidae: Hymenoptera), to constitutive and induced volatiles from different maize landraces (Jowi Red, Nyamula) and hybrids (SC Duma, DK 777) grown in Kenya and compared their volatile profiles. In a four-arm olfactometer, female parasitoid wasps were significantly attracted to FAW oviposition-induced VOCs from SC Duma and Nyamula. Chemical analysis of test plant volatiles revealed significant variation in the quantity and quality of key bioactive VOCs such as (E)-2-hexenal, α-pinene, (Z)-3-hexenyl acetate, (E)-4,8-dimethyl-1,3,7-nonatriene, α-copaene, (E)-β-farnesene and (E, E)-4,8,12-trimethyl-1,3,7,11-tridecatetraene. Our findings provide more insights into genetic variation in VOCs emission across maize genotypes and the corresponding differences in attraction of pest natural enemies that provide indirect defense. As such, these traits could be exploited to enhance ecologically sustainable pest management strategies.</p>","PeriodicalId":15346,"journal":{"name":"Journal of Chemical Ecology","volume":"51 2","pages":"34"},"PeriodicalIF":2.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11903515/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143615642","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}