201
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Walker WB, Roy A, Anderson P, Schlyter F, Hansson BS, Larsson MC. Transcriptome Analysis of Gene Families Involved in Chemosensory Function in Spodoptera littoralis (Lepidoptera: Noctuidae). BMC Genomics 2019; 20:428. [PMID: 31138111 PMCID: PMC6540431 DOI: 10.1186/s12864-019-5815-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 05/20/2019] [Indexed: 11/26/2022] Open
Abstract
Background Deciphering the molecular mechanisms mediating the chemical senses, taste, and smell has been of vital importance for understanding the nature of how insects interact with their chemical environment. Several gene families are implicated in the uptake, recognition, and termination of chemical signaling, including binding proteins, chemosensory receptors and degrading enzymes. The cotton leafworm, Spodoptera littoralis, is a phytophagous pest and current focal species for insect chemical ecology and neuroethology. Results We produced male and female Illumina-based transcriptomes from chemosensory and non-chemosensory tissues of S. littoralis, including the antennae, proboscis, brain and body carcass. We have annotated 306 gene transcripts from eight gene families with known chemosensory function, including 114 novel candidate genes. Odorant receptors responsive to floral compounds are expressed in the proboscis and may play a role in guiding proboscis probing behavior. In both males and females, expression of gene transcripts with known chemosensory function, including odorant receptors and pheromone-binding proteins, has been observed in brain tissue, suggesting internal, non-sensory function for these genes. Conclusions A well-curated set of annotated gene transcripts with putative chemosensory function is provided. This will serve as a resource for future chemosensory and transcriptomic studies in S. littoralis and closely related species. Collectively, our results expand current understanding of the expression patterns of genes with putative chemosensory function in insect sensory and non-sensory tissues. When coupled with functional data, such as the deorphanization of odorant receptors, the gene expression data can facilitate hypothesis generation, serving as a substrate for future studies. Electronic supplementary material The online version of this article (10.1186/s12864-019-5815-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- William B Walker
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sundsvägen 14, 230 53, Alnarp, Sweden.
| | - Amit Roy
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sundsvägen 14, 230 53, Alnarp, Sweden.,Faculty of Forestry and Wood Sciences, EXTEMIT-K, Czech University of Life Sciences, Kamýcká 1176, Prague 6, 165 21, Suchdol, Czech Republic
| | - Peter Anderson
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sundsvägen 14, 230 53, Alnarp, Sweden
| | - Fredrik Schlyter
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sundsvägen 14, 230 53, Alnarp, Sweden.,Faculty of Forestry and Wood Sciences, EXTEMIT-K, Czech University of Life Sciences, Kamýcká 1176, Prague 6, 165 21, Suchdol, Czech Republic
| | - Bill S Hansson
- Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, 07745, Jena, Germany
| | - Mattias C Larsson
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sundsvägen 14, 230 53, Alnarp, Sweden
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202
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Holighaus G, Rohlfs M. Volatile and non-volatile fungal oxylipins in fungus-invertebrate interactions. FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2018.09.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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203
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Aartsma Y, Cusumano A, Fernández de Bobadilla M, Rusman Q, Vosteen I, Poelman EH. Understanding insect foraging in complex habitats by comparing trophic levels: insights from specialist host-parasitoid-hyperparasitoid systems. CURRENT OPINION IN INSECT SCIENCE 2019; 32:54-60. [PMID: 31113632 DOI: 10.1016/j.cois.2018.11.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 10/09/2018] [Accepted: 11/06/2018] [Indexed: 06/09/2023]
Abstract
Insects typically forage in complex habitats in which their resources are surrounded by non-resources. For herbivores, pollinators, parasitoids, and higher level predators research has focused on how specific trophic levels filter and integrate information from cues in their habitat to locate resources. However, these insights frequently build specific theory per trophic level and seldom across trophic levels. Here, we synthesize advances in understanding of insect foraging behavior in complex habitats by comparing trophic levels in specialist host-parasitoid-hyperparasitoid systems. We argue that resources may become less apparent to foraging insects when they are member of higher trophic levels and hypothesize that higher trophic level organisms require a larger number of steps in their foraging decisions. We identify important knowledge gaps of information integration strategies by insects that belong to higher trophic levels.
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Affiliation(s)
- Yavanna Aartsma
- Wageningen University, Laboratory of Entomology, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Antonino Cusumano
- Wageningen University, Laboratory of Entomology, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | | | - Quint Rusman
- Wageningen University, Laboratory of Entomology, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Ilka Vosteen
- Wageningen University, Laboratory of Entomology, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Erik H Poelman
- Wageningen University, Laboratory of Entomology, P.O. Box 16, 6700 AA Wageningen, The Netherlands.
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204
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Ahmed N, Darshanee HLC, Khan IA, Zhang ZF, Liu TX. Host Selection Behavior of the Green Peach Aphid, Myzus persicae, in Response to Volatile Organic Compounds and Nitrogen Contents of Cabbage Cultivars. FRONTIERS IN PLANT SCIENCE 2019; 10:79. [PMID: 30930910 PMCID: PMC6424066 DOI: 10.3389/fpls.2019.00079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 01/17/2019] [Indexed: 05/22/2023]
Abstract
Plants emit volatile organic compounds (VOCs) in response to herbivore attack. VOCs emitted from the Chinese cabbage cultivars in response to the damage by the green peach aphid, Myzus persicae, were unknown. Using a solid-phase microextraction-based headspace collection method, we investigated and compared the emissions of VOCs from seven Chinese cabbage cultivars (Qibao, Qingan 80, Lvlong, Yuanbao, Qingan 70, Jinlv, and Lvqiu 66) in response to M. persicae attack. Our results showed that the VOCs emitted from the cultivars Qingan 80 and Yuanbao differed significantly from the other cultivars in response to the attraction of wingless M. persicae. Most importantly, out of the 27 detected compounds, α-caryophyllene was detected only in Qingan 80 and Qibao, but not in the other five cultivars. Among the compounds detected, 2 monoterpene and 12 terpenes were predominant in all cabbage cultivars. Furthermore, the wingless M. persicae showed preference to Qingan 80 while it had the highest nitrogen content among the tested cultivars. Moreover, we found a remarkable relationship among M. persicae attraction, plant nitrogen content, and total volatile emissions. Nitrogen content of the plants has a significant impact on volatile emission and preference behavior of M. persicae. Our results indicate that the wingless M. persicae were efficient in their interspecific host selection with an ability to distinguish plant cultivar differences by leaf nitrogen content. This study will be helpful in understanding aphid host selection, and sets a stage to further study the attractant-based integrated aphid management programs.
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Affiliation(s)
- Nazeer Ahmed
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, Northwest A&F University, Yangling, China
- Department of Agriculture, University of Swabi, Swabi, Pakistan
| | - Hewa Lunuwilage Chamila Darshanee
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, Northwest A&F University, Yangling, China
- Graduate Research School, University of Southern Queensland, Toowoomba, QLD, Australia
| | - Imtiaz Ali Khan
- Department of Entomology, The University of Agriculture, Peshawar, Pakistan
| | - Zhan-Feng Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, Northwest A&F University, Yangling, China
| | - Tong-Xian Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, China
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, Northwest A&F University, Yangling, China
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205
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Aboubakar Souna D, Bokonon-Ganta AH, Dannon EA, Imorou N, Agui B, Cusumano A, Srinivasan R, Pittendrigh BR, Volkoff AN, Tamò M. Volatiles from Maruca vitrata (Lepidoptera, Crambidae) host plants influence olfactory responses of the parasitoid Therophilus javanus (Hymenoptera, Braconidae, Agathidinae). BIOLOGICAL CONTROL : THEORY AND APPLICATIONS IN PEST MANAGEMENT 2019; 130:104-109. [PMID: 30828225 PMCID: PMC6365886 DOI: 10.1016/j.biocontrol.2018.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 11/06/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Abstract
Plants damaged by herbivores are known to release odors attracting parasitoids. However, there is currently no information how leguminous plants damaged by the pod borer Maruca vitrata attract the exotic larval parasitoid Therophilus javanus, which was imported into Benin from the putative area of origin of the pod borer in tropical Asia for assessing its potential as a biological control agent. In this study, we used Y-tube olfactometer bioassays to investigate T. javanus response towards odors emitted by four M. vitrata-damaged host plants: cowpea Vigna unguiculata, the most important cultivated host, and the naturally occurring legumes Lonchocarpus sericeus, Sesbania rostrata and Tephrosia platycarpa. Olfactory attraction of T. javanus was influenced by the species of plant damaged by the pod borer. Moreover, odors released from M. vitrata-infested host plant organs (flowers and pods) were discriminated over non-infested organs in cowpea and T. platycarpa, respectively. These results are discussed in the context of the possible impact of M. vitrata host plants on T. javanus foraging activity and subsequent establishment in natural environments following experimental releases.
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Affiliation(s)
- Djibril Aboubakar Souna
- UMR DGIMI 1333 INRA, UM, Case Courrier 101, Place Eugène Bataillon, 34 095 Montpellier, France
- International Institute of Tropical Agriculture, Benin Research Station (IITA-Benin), 08 BP 0932 Tri Postal, Cotonou, Benin
- Department of Crop Production, Faculty of Agronomic Sciences (FSA), University of Abomey-Calavi (UAC), 03 BP 2819 Cotonou, Benin
| | - Aimé Hippolyte Bokonon-Ganta
- Department of Crop Production, Faculty of Agronomic Sciences (FSA), University of Abomey-Calavi (UAC), 03 BP 2819 Cotonou, Benin
| | - Elie Ayitondji Dannon
- International Institute of Tropical Agriculture, Benin Research Station (IITA-Benin), 08 BP 0932 Tri Postal, Cotonou, Benin
| | - Nazyhatou Imorou
- International Institute of Tropical Agriculture, Benin Research Station (IITA-Benin), 08 BP 0932 Tri Postal, Cotonou, Benin
| | - Benjamin Agui
- International Institute of Tropical Agriculture, Benin Research Station (IITA-Benin), 08 BP 0932 Tri Postal, Cotonou, Benin
| | - Antonino Cusumano
- UMR DGIMI 1333 INRA, UM, Case Courrier 101, Place Eugène Bataillon, 34 095 Montpellier, France
| | | | | | - Anne-Nathalie Volkoff
- UMR DGIMI 1333 INRA, UM, Case Courrier 101, Place Eugène Bataillon, 34 095 Montpellier, France
| | - Manuele Tamò
- International Institute of Tropical Agriculture, Benin Research Station (IITA-Benin), 08 BP 0932 Tri Postal, Cotonou, Benin
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206
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Cusumano A, Harvey JA, Dicke M, Poelman EH. Hyperparasitoids exploit herbivore-induced plant volatiles during host location to assess host quality and non-host identity. Oecologia 2019; 189:699-709. [PMID: 30725370 PMCID: PMC6418317 DOI: 10.1007/s00442-019-04352-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 01/30/2019] [Indexed: 10/27/2022]
Abstract
Although consumers often rely on chemical information to optimize their foraging strategies, it is poorly understood how top carnivores above the third trophic level find resources in heterogeneous environments. Hyperparasitoids are a common group of organisms in the fourth trophic level that lay their eggs in or on the body of other parasitoid hosts. Such top carnivores use herbivore-induced plant volatiles (HIPVs) to find caterpillars containing parasitoid host larvae. Hyperparasitoids forage in complex environments where hosts of different quality may be present alongside non-host parasitoid species, each of which can develop in multiple herbivore species. Because both the identity of the herbivore species and its parasitization status can affect the composition of HIPV emission, hyperparasitoids encounter considerable variation in HIPVs during host location. Here, we combined laboratory and field experiments to investigate the role of HIPVs in host selection of hyperparasitoids that search for hosts in a multi-parasitoid multi-herbivore context. In a wild Brassica oleracea-based food web, the hyperparasitoid Lysibia nana preferred HIPVs emitted in response to caterpillars parasitized by the gregarious host Cotesia glomerata over the non-host Hyposoter ebeninus. However, no plant-mediated discrimination occurred between the solitary host C. rubecula and the non-host H. ebeninus. Under both laboratory and field conditions, hyperparasitoid responses were not affected by the herbivore species (Pieris brassicae or P. rapae) in which the three primary parasitoid species developed. Our study shows that HIPVs are an important source of information within multitrophic interaction networks allowing hyperparasitoids to find their preferred hosts in heterogeneous environments.
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Affiliation(s)
- Antonino Cusumano
- Laboratory of Entomology, Department of Plant Sciences, Wageningen University, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands.
| | - Jeffrey A Harvey
- Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
- Section Animal Ecology, Department of Ecological Sciences, VU University Amsterdam, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands
| | - Marcel Dicke
- Laboratory of Entomology, Department of Plant Sciences, Wageningen University, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Erik H Poelman
- Laboratory of Entomology, Department of Plant Sciences, Wageningen University, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
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207
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Worthy SE, Rojas GL, Taylor CJ, Glater EE. Identification of Odor Blend Used by Caenorhabditis elegans for Pathogen Recognition. Chem Senses 2019; 43:169-180. [PMID: 29373666 PMCID: PMC6018680 DOI: 10.1093/chemse/bjy001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Animals have evolved specialized pathways to detect appropriate food sources and avoid harmful ones. Caenorhabditis elegans can distinguish among the odors of various species of bacteria, its major food source, but little is known about what specific chemical cue or combination of chemical cues C. elegans uses to detect and recognize different microbes. Here, we examine the strong innate attraction of C. elegans for the odor of the pathogenic bacterium, Serratia marcescens. This initial attraction likely facilitates ingestion and infection of the C. elegans host. Using solid-phase microextraction and gas chromatography coupled with mass spectrometry, we identify 5 volatile odors released by S. marcescens and identify those that are attractive to C. elegans. We use genetic methods to show that the amphid chemosensory neuron, AWCON, senses both S. marcescens-released 2-butanone and acetone and drives attraction to S. marcescens. In C. elegans, pairing a single odorant with food deprivation results in a reduced attractive response for that specific odor. We find that pairing the natural odor of S. marcescens with food deprivation results in a reduced attraction for the natural odor of S. marcescens and a similar reduced attraction for the synthetic blend of acetone and 2-butanone. This result indicates that only 2 odorants represent the more complex odor bouquet of S. marcescens. Although bacterial-released volatiles have long been known to be attractive to C. elegans, this study defines for the first time specific volatile cues that represent a particular bacterium to C. elegans.
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Affiliation(s)
| | - German L Rojas
- Department of Neuroscience, Pomona College, Claremont, CA, USA
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208
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Behavioural responses of bean flower thrips (Megalurothrips sjostedti) to vegetative and floral volatiles from different cowpea cultivars. CHEMOECOLOGY 2019. [DOI: 10.1007/s00049-019-00278-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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209
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Herbivore-Induced Volatiles from Maize Plants Attract Chelonus insularis, an Egg-Larval Parasitoid of the Fall Armyworm. J Chem Ecol 2019; 45:326-337. [PMID: 30746603 DOI: 10.1007/s10886-019-01051-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 01/18/2019] [Accepted: 01/28/2019] [Indexed: 10/27/2022]
Abstract
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. insularis females. In a Y-glass tube olfactometer, parasitoid females were more attracted to activated charcoal extracts than Porapak Q maize extracts. Chemical analysis of activated charcoal extracts from maize plants damaged by S. frugiperda larvae by gas chromatography coupled with electroantennography (GC-EAD) showed that the antennae of virgin female wasps consistently responded to three compounds, identified by gas chromatography-mass spectrometry (GC-MS) as α-pinene, α-longipinene and α-copaene. These compounds are constitutively released by maize plants but induction via herbivory affects their emissions. α-Longipinene and α-copaene were more abundant in damaged maize plants than in healthy ones, whereas α-pinene was produced in higher amounts in healthy maize plants than in damaged ones. Female parasitoids were not attracted to EAD-active compounds when evaluated singly; however, they were attracted to the binary blend α-pinene + α-copaene, which was the most attractive blend, even more attractive than the tertiary blend (α-pinene + α-longipinene + α-copaene) and the damaged maize plant extracts. We conclude that C. insularis is attracted to a blend of herbivore-induced volatiles emitted by maize plants.
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210
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Mechanisms of Resistance to Insect Herbivores in Isolated Breeding Lineages of Cucurbita pepo. J Chem Ecol 2019; 45:313-325. [DOI: 10.1007/s10886-019-01046-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/05/2018] [Accepted: 01/15/2019] [Indexed: 10/27/2022]
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211
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Zhou Q, Cheng X, Wang S, Liu S, Wei C. Effects of Chemical Insecticide Imidacloprid on the Release of C 6 Green Leaf Volatiles in Tea Plants (Camellia sinensis). Sci Rep 2019; 9:625. [PMID: 30679494 PMCID: PMC6345918 DOI: 10.1038/s41598-018-36556-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 11/23/2018] [Indexed: 11/27/2022] Open
Abstract
Chemical insecticides are widely used for pest control worldwide. However, the impact of insecticides on indirect plant defense is seldom reported. Here, using tea plants and the pesticide imidacloprid, effects of chemical insecticides on C6-green leaf volatiles (GLVs) anabolism and release were investigated first time. Compared with the non-treated control plants, the treatment of imidacloprid resulted in the lower release amount of key GLVs: (Z)-3-hexenal, n-hexenal, (Z)-3-hexene-1-ol and (Z)-3-Hexenyl acetate. The qPCR analysis revealed a slight higher transcript level of the CsLOX3 gene but a significantly lower transcript level of CsHPL gene. Our results suggest that imidacloprid treatment can have a negative effect on the emission of GLVs due to suppressing the critical GLVs synthesis-related gene, consequently affecting plant indirect defense.
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Affiliation(s)
- Qiying Zhou
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China.,Henan Key Laboratory of Tea Plant Biology, Xinyang Normal University, 237 Nanhu Road, Xinyang, 464000, Henan, China.,Institute for Conservation and Utilization of Agro-Bioresources in Dabie Mountains, Xinyang Normal University, 237 Nanhu Road, Xinyang, 464000, Henan, China
| | - Xi Cheng
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Shuangshuang Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Shengrui Liu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Chaoling Wei
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China.
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212
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Rizvi SAH, Ling S, Tian F, Liu J, Zeng X. Interference mechanism of Sophora alopecuroides L. alkaloids extract on host finding and selection of the Asian citrus psyllid Diaphorina citri Kuwayama (Hemiptera: Psyllidae). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:1548-1557. [PMID: 30430450 DOI: 10.1007/s11356-018-3733-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 11/09/2018] [Indexed: 06/09/2023]
Abstract
Manipulating insect behavior through the deployment of semiochemicals offers a promising opportunity for protecting crops in a sustainable manner. Therefore, there is still a significant opportunity for the development of natural crop protectants as eco-friendly tools in pest management. In this context, the aim of the current investigation is to find a novel prophylactic against the Asian citrus psyllid (ACP) and to gain a better understanding of the host-finding and selection ability of the ACP towards Murraya paniculata seedlings treated with Sophora alopecuroides alkaloids extract (SAAE). Our results indicate that foliar application of SAAE influences the psyllid host-finding and selection process. The behavioral assay with M. paniculata seedlings treated with 15 and 30 mg/mL of SAAE, with masked visual cues, revealed that only 6.6 and 10.4% psyllids were able to locate the host in the vials. The results also indicate that citrus psyllids mainly rely on both visual and olfaction in host-finding and selection. In choice settling experiments, psyllids settled almost completely on control seedlings rather than on seedlings treated with SAAE at a concentration of 30 mg/mL. Chemical analyses of the alkaloids extract revealed the presence of sophocarpine (33.90%), sophoridine (6.23%), anagyrine (2.77%), matrine (2.38%), lupanine (1.68%) aphylline (0.89%), and sophoramine (0.75%). In further behavioral bioassays with the dominant alkaloids sophocarpine and sophoridine, the alkaloids repelled ACP at higher concentrations of 50 and 70 mg/mL as compared to SAAE. Furthermore, the 50 mg/mL (1:1, v/v) combination of sophocarpine and sophoridine displayed a synergistic effect and showed the maximum behavioral effect as compared to the individual alkaloid. Based on our results, SAAE makes M. paniculata seedlings unattractive to the psyllids, and therefore, alkaloids could be used in reducing the colonization of citrus plants, subsequently curtailing HLB infection.
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Affiliation(s)
- Syed Arif Hussain Rizvi
- Guangdong Engineering Research Center for Insect Behavior Regulation, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Siquan Ling
- Guangdong Engineering Research Center for Insect Behavior Regulation, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Fajun Tian
- Guangdong Engineering Research Center for Insect Behavior Regulation, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Jiali Liu
- Guangdong Engineering Research Center for Insect Behavior Regulation, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Xinnian Zeng
- Guangdong Engineering Research Center for Insect Behavior Regulation, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China.
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213
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Collection, Identification, and Statistical Analysis of Volatile Organic Compound Patterns Emitted by Phytoplasma Infected Plants. Methods Mol Biol 2019; 1875:333-343. [PMID: 30362015 DOI: 10.1007/978-1-4939-8837-2_25] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In this chapter, we give an introduction to innovative attempts for the collection, identification, and statistical analysis of volatile organic compound (VOC) patterns emitted by phytoplasma-infected plants compared to healthy plants by the use of state-of-the-art techniques. This encompasses headspace-sampling techniques, gas chromatography coupled with mass spectrometry, and identification of VOC patterns by the "Automated Mass Spectral Deconvolution and Identification System" (AMDIS) followed by appropriate statistical analysis.
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214
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Guarino S, Arif MA, Millar JG, Colazza S, Peri E. Volatile unsaturated hydrocarbons emitted by seedlings of Brassica species provide host location cues to Bagrada hilaris. PLoS One 2018; 13:e0209870. [PMID: 30589910 PMCID: PMC6307740 DOI: 10.1371/journal.pone.0209870] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 12/12/2018] [Indexed: 01/17/2023] Open
Abstract
Bagrada hilaris Burmeister, is a stink bug native to Asia and Africa and invasive in the United States, Mexico, and more recently, South America. This species can cause serious damage to various vegetable crops in the genus Brassica, with seedlings being particularly susceptible to B. hilaris feeding activity. In this study, the role of volatile organic compounds (VOCs) emitted by seedlings of three Brassica species on the host preference of B. hilaris was evaluated. In dual choice arena and olfactometer bioassays, adult painted bugs preferred B. oleracea var. botrytis and B. napus over B. carinata. Volatiles from B. oleracea seedlings were collected and bioassayed with B. hilaris adults and late stage nymphs, using electroantennographic (EAG) and behavioral (olfactometer) techniques. When crude extracts of the VOCs from B. oleracea var. botrytis seedlings and liquid chromatography fractions thereof were bioassayed, B. hilaris adults and nymphs were attracted to the crude extract, and to a non-polar fraction containing hydrocarbons, whereas there were no responses to the more polar fractions. GC-MS analysis indicated that the main constituents of the non-polar fraction was an as yet unidentified diterpene hydrocarbon, with trace amounts of several other diterpene hydrocarbons. The major diterpene occurred in VOCs from both of the preferred host plants B. oleracea and B. napus, but not in VOCs of B. carinata. Our results suggest that this diterpene, alone or in combination with one or more of the minor compounds, is a key mediator in this insect-plant interaction, and could be a good candidate for use in lures for monitoring B. hilaris in the field.
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Affiliation(s)
- Salvatore Guarino
- Dipartimento di Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Mokhtar Abdulsattar Arif
- Dipartimento di Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Jocelyn G. Millar
- Department of Entomology, University of California, Riverside, California, United States of America
| | - Stefano Colazza
- Dipartimento di Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Ezio Peri
- Dipartimento di Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Palermo, Italy
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215
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Jaleel W, Tao X, Wang D, Lu L, He Y. Using Two-Sex Life Table Traits to Assess the Fruit Preference and Fitness of Bactrocera dorsalis (Diptera: Tephritidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:2936-2945. [PMID: 30137386 DOI: 10.1093/jee/toy243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Indexed: 06/08/2023]
Abstract
Bactrocera flies are economic pests of agricultural crops all over the world. Among Bactrocera flies, oriental fruit fly is an economically important pest of fruit crops in the world. Basic studies of Bactrocera flies are very important and helpful to the development of integrated management strategies. However, basic studies regarding behavior and age-stage, two-sex life table traits for this pest, which are vital for designing effective control methods, are currently lacking. Considering the importance of B. dorsalis, this study aimed to evaluate the fruit preference and age-stage, two-sex life table traits of B. dorsalis on guava (Psidium guajava), papaya (Carica papaya), and banana (Musa acuminata) fruits in the laboratory. In choice and no-choice tests, the number of visits and oviposition punctures made by female B. dorsalis flies were significantly higher on guava than those on papaya and banana. The life cycle from eggs to male (146.95 ± 3.43 d) and female (164.94 ± 3.85 d) adults was significantly longer on papaya than those on banana and guava. Bactrocera dorsalis females produced significantly more eggs when fed on guava (623.30 eggs female-1) than on papaya (527.80 eggs female-1) or banana (399.60 eggs female-1). Guava was the more suitable fruit for B. dorsalis, and could be used as a bait fruit to manage the B. dorsalis during the fruiting season of papaya and banana.
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Affiliation(s)
- Waqar Jaleel
- Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Xiaobing Tao
- Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Desen Wang
- Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Lihua Lu
- Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
| | - Yurong He
- Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou, Guangdong Province, China
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216
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Barrett BA, Patterson ME, Xiong X. Behavioral Responses of Hunting Billbug (Coleoptera: Curculionidae) Towards Odors From Different Turfgrass Species and Adult Conspecifics. ENVIRONMENTAL ENTOMOLOGY 2018; 47:1541-1546. [PMID: 30165586 DOI: 10.1093/ee/nvy125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Indexed: 06/08/2023]
Abstract
A series of bioassays involving a four-choice olfactometer were conducted to assess the behavioral responsiveness of adult hunting billbugs (Sphenophorus venatus vestitus Chittenden) towards odors emanating from samples of three different turfgrasses: tall fescue (Festuca arundinacea Schreb. (Poales: Poaceae)), Kentucky bluegrass (Poa pratensis L. (Poales: Poaceae)), and zoysiagrass (Zoysia japonica Steud. (Poales: Poaceae)). When exposed to the three turf species simultaneously, the majority of billbugs preferred the zoysiagrass treatment over the tall fescue and Kentucky bluegrass treatments. When billbugs of both sexes were added to the three turf treatments, their presence with the turf did not enhance the released billbugs preference towards any of the treatments. Without the presence of turf, the released female billbugs were strongly attracted towards the male-only billbug treatment; however, a similar phenomenon was not observed for males. When a single turf type and/or mixed-sex adult billbugs were presented, treatments that contained the turf, especially zoysiagrass and tall fescue, strongly attracted the released billbugs compared with treatments that contained billbugs only. In the final bioassay experiment when billbugs were exposed to treatments of zoysiagrass and zoysiagrass + billbugs (with either sex), the released billbugs showed a significant preference towards the zoysiagrass + male billbugs treatment. Collectively, this series of experiments demonstrated the hunting billbugs preference to all three turf species tested, and their attraction to male conspecifics. This overall study was the first to investigate some basic aspects of the chemical ecology of the hunting billbug; specifically, the role turfgrass and adult billbug volatiles might have in billbug orientation and host selection.
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Affiliation(s)
- Bruce A Barrett
- Division of Plant Sciences, University of Missouri, Columbia, MO
| | | | - Xi Xiong
- Division of Plant Sciences, University of Missouri, Columbia, MO
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217
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Binyameen M, Ejaz M, Shad SA, Razaq M, Shah RM, Schlyter F. Eugenol, a Plant Volatile, Synergizes the Effect of the Thrips Attractant, Ethyl Iso-Nicotinate. ENVIRONMENTAL ENTOMOLOGY 2018; 47:1560-1564. [PMID: 30346518 DOI: 10.1093/ee/nvy153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Indexed: 06/08/2023]
Abstract
The onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), is a polyphagous pest that causes serious damage to agricultural crops, vegetables, and ornamental plants worldwide. Farmers rely on the extensive usage of synthetic chemical insecticides to control T. tabaci. There is a dire need to develop alternative control strategies to overcome the problems posed by chemical insecticides. Efficient traps would allow sensitive monitoring and possibly mass trapping. A field experiment was conducted to evaluate the potential of three plant compounds with known release rates (ranging from 6-30 mg/d); eugenol (Eug), 1, 8-cineole (eucalyptol), and linalool in all possible combinations with a thrips attractant, ethyl iso-nicotinate (EI). A combination of EI with Eug increased the effect of EI by attracting 100% more thrips (effect size, 1.95) as compared to the control of EI alone. Catches in remaining treatments were lower and or not significantly different from EI alone. The results from our study could be used to develop improved volatile blends to be used for monitoring traps. Our data suggests that these traps could be effective even at very low populations.
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Affiliation(s)
- Muhammad Binyameen
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
- Faculty of Forestry and Wood Sciences, EXTEMIT-K, Czech University of Life Sciences, Kamýcká, Prague, Suchdol, Czech Republic
- Chemical Ecology Laboratory, Department of Entomology, Penn State University, University Park, PA
| | - Masood Ejaz
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
| | - Sarfraz Ali Shad
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
| | - Muhammad Razaq
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
| | - Rizwan Mustafa Shah
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
| | - Fredrik Schlyter
- Faculty of Forestry and Wood Sciences, EXTEMIT-K, Czech University of Life Sciences, Kamýcká, Prague, Suchdol, Czech Republic
- Unit of Chemical Ecology, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, SE, Alnarp, Sweden
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218
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Turnipseed RK, Moran PJ, Allan SA. Behavioral responses of gravid Culex quinquefasciatus, Aedes aegypti, and Anopheles quadrimaculatus mosquitoes to aquatic macrophyte volatiles. JOURNAL OF VECTOR ECOLOGY : JOURNAL OF THE SOCIETY FOR VECTOR ECOLOGY 2018; 43:252-260. [PMID: 30408300 DOI: 10.1111/jvec.12309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 06/21/2018] [Indexed: 06/08/2023]
Abstract
Mosquitoes use many cues to assess whether a habitat is conducive for reproduction, possibly including the presence of stimuli from aquatic macrophytes. The effect of water infusions of water hyacinth (Eichhornia crassipes), water lettuce (Pista stratioles), parrotfeather (Myriophyllum aquaticum), and water pennywort (Hydrocotyle umbellata) on mosquito oviposition and attraction was investigated. Gravid Culex quinquefasciatus deposited significantly more egg rafts in water hyacinth, water lettuce, or Bermuda hay (positive control) infusions compared to water, while water pennywort and parrotfeather infusions did not differ from water. In-flight attraction responses of Cx. quinquefasciatus, Aedes aegypti, and Anopheles quadrimaculatus were evaluated. The strongest attraction of gravid Cx. quinquefasciatus and Ae. aegypti occurred in the presence of volatiles from infusions of water hyacinth and water lettuce, which were equal in attractiveness to hay infusion. Water pennywort and parrotfeather infusions were not attractive. Gravid An. quadrimaculatus were not attracted to aquatic plant volatiles. The results suggest that water hyacinth and water lettuce emit volatile chemicals that attract two of three mosquito species tested and stimulate oviposition by Cx. quinquefasciatus, demonstrating that the level of attraction of aquatic plant volatiles varies among species in ways that may have relevance to bait-based detection and control methods.
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Affiliation(s)
- Rakim K Turnipseed
- Department of Environmental Science, Policy & Management, University of California, Berkeley, CA 94720, U.S.A
- Current address: FMC Global Specialty Solutions, Philadelphia, PA 19104, U.S.A
| | - Patrick J Moran
- USDA-ARS, Western Regional Research Center, Invasive Species and Pollinator Health Research Unit, Albany, CA 94710, U.S.A
| | - Sandra A Allan
- USDA-ARS, Center for Medical, Agricultural and Veterinary Entomology, Gainesville, FL 32608, U.S.A
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219
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Silva RF, Rabeschini GBP, Peinado GLR, Cosmo LG, Rezende LHG, Murayama RK, Pareja M. The Ecology of Plant Chemistry and Multi-Species Interactions in Diversified Agroecosystems. FRONTIERS IN PLANT SCIENCE 2018; 9:1713. [PMID: 30524464 PMCID: PMC6262048 DOI: 10.3389/fpls.2018.01713] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 11/05/2018] [Indexed: 05/27/2023]
Abstract
Over the past few years, our knowledge of how ecological interactions shape the structure and dynamics of natural communities has rapidly advanced. Plant chemical traits play key roles in these processes because they mediate a diverse range of direct and indirect interactions in a community-wide context. Many chemically mediated interactions have been extensively studied in industrial cropping systems, and thus have focused on simplified, pairwise and linear interactions that rarely incorporate a community perspective. A contrasting approach considers the agroecosystem as a functioning whole, in which food production occurs. It offers an opportunity to better understand how plant chemical traits mediate complex interactions which can enhance or hinder ecosystem functions. In this paper, we argue that studying chemically mediated interactions in agroecosystems is essential to comprehend how agroecosystem services emerge and how they can be guaranteed through ecosystem management. First, we discuss how plant chemical traits affect and are affected by ecological interactions. We then explore research questions and future directions on how studying chemical mediation in complex agroecosystems can help us understand the emergence and management of ecosystem services, specifically biological control and pollination.
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Affiliation(s)
- Rodolfo F Silva
- Programa de Pós-Graduação em Ecologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil
| | - Gabriela B P Rabeschini
- Programa de Pós-Graduação em Ecologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil
| | | | - Leandro G Cosmo
- Programa de Pós-Graduação em Ecologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil
| | - Luiz H G Rezende
- Programa de Pós-Graduação em Ecologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil
| | - Rafael K Murayama
- Programa de Pós-Graduação em Ecologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil
| | - Martín Pareja
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil
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220
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de Fouchier A, Sun X, Caballero-Vidal G, Travaillard S, Jacquin-Joly E, Montagné N. Behavioral Effect of Plant Volatiles Binding to Spodoptera littoralis Larval Odorant Receptors. Front Behav Neurosci 2018; 12:264. [PMID: 30483075 PMCID: PMC6240680 DOI: 10.3389/fnbeh.2018.00264] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 10/18/2018] [Indexed: 11/13/2022] Open
Abstract
Phytophagous insects use volatile organic compounds (VOC) emitted by plants to orient towards their hosts. In lepidopteran pests, crop damages are caused by larval stages-the caterpillars-that feed extensively on leaves or other plant tissues. However, larval host plant choice has been poorly studied, and it is generally admitted that caterpillars feed on the plant where the female laid the eggs. The mobility of caterpillars has been generally overlooked even though several studies showed that they can orient towards odors and change host plant. Recently, a large number of odorant receptors (ORs) tuned to plant volatiles have been characterized in the model pest moth Spodoptera littoralis (Noctuidae). In the present work, we identified nine of these deorphanized ORs as expressed in S. littoralis caterpillars. In order to understand whether these ORs are involved in host searching, we tested the behavioral significance of their ligands using a larval two-choice assay. This OR-guided approach led to the identification of nine plant volatiles, namely 1-hexanol, benzyl alcohol, acetophenone, benzaldehyde, (Z)3-hexenol, (E)2-hexenol, indole, DMNT and (Z)3-hexenyl acetate, which are active on S. littoralis caterpillar behavior, increasing our knowledge on larval olfactory abilities. To further explore the link between OR activation and behavioral output induced by plant volatiles we used a modeling approach, thereby allowing identification of some ORs whose activation is related to caterpillar attraction. These ORs may be promising targets for future plant protection strategies.
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Affiliation(s)
| | | | | | | | | | - Nicolas Montagné
- Institut National de la Recherche Agronomique (INRA), Sorbonne Université, CNRS, IRD, UPEC, Université Paris Diderot, Institute of Ecology and Environmental Sciences of Paris, Paris and Versailles, France
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221
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Kessler A, Kalske A. Plant Secondary Metabolite Diversity and Species Interactions. ANNUAL REVIEW OF ECOLOGY EVOLUTION AND SYSTEMATICS 2018. [DOI: 10.1146/annurev-ecolsys-110617-062406] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Ever since the first plant secondary metabolites (PSMs) were isolated and identified, questions about their ecological functions and diversity have been raised. Recent advances in analytical chemistry and complex data computation, as well as progress in chemical ecology from mechanistic to functional and evolutionary questions, open a new box of hypotheses. Addressing these hypotheses includes the measurement of complex traits, such as chemodiversity, in a context-dependent manner and allows for a deeper understanding of the multifunctionality and functional redundancy of PSMs. Here we review a hypothesis framework that addresses PSM diversity on multiple ecological levels (α, β, and γ chemodiversity), its variation in space and time, and the potential agents of natural selection. We use the concept of chemical information transfer as mediator of antagonistic and mutualistic interaction to interpret functional and microevolutionary studies and create a hypothesis framework for understanding chemodiversity as a factor driving ecological processes.
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Affiliation(s)
- André Kessler
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York 14853, USA;,
| | - Aino Kalske
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York 14853, USA;,
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222
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Schlaeger S, Pickett JA, Birkett MA. Prospects for management of whitefly using plant semiochemicals, compared with related pests. PEST MANAGEMENT SCIENCE 2018; 74:2405-2411. [PMID: 29717814 PMCID: PMC6221090 DOI: 10.1002/ps.5058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/27/2018] [Accepted: 04/27/2018] [Indexed: 06/08/2023]
Abstract
Whitefly (Hemiptera: Sternorrhyncha: Aleyrodidae) pests, including the tobacco whitefly, Bemisia tabaci, and the greenhouse whitefly, Trialeurodes vaporariorum, are important economically in agriculture. Whiteflies are controlled mainly by synthetic insecticides but resistance to these is evolving rapidly. A semiochemical-based management strategy could provide an alternative to the use of insecticides, by exploiting natural volatile signalling processes to manipulate insect behaviour. Whitefly behaviour is affected by differences in plant odour blends. Selected compounds have been suggested as putative semiochemicals, but in only a few studies have potential volatiles been characterized by electrophysiology or olfactometry. Application of antennal preparation methods from closely related families, the aphids (Hemiptera: Aphididae) and psyllids (Hemiptera: Psyllidae), may help to facilitate whitefly electroantennography. Behavioural bioassays are essential to identify the repellent or attractant effect of each semiochemical. The relevance of semiochemicals in whitefly management needs to be evaluated in the respective cultivation system. Although the value of semiochemicals against whiteflies has not been demonstrated in the field, there is an emerging range of possible field applications and some promising prospects. Overall, the olfactory system of whiteflies needs to be elucidated in more detail. © 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Stefanie Schlaeger
- Biointeractions and Crop Protection DepartmentRothamsted ResearchHarpendenUK
| | | | - Michael A Birkett
- Biointeractions and Crop Protection DepartmentRothamsted ResearchHarpendenUK
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223
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Ameye M, Allmann S, Verwaeren J, Smagghe G, Haesaert G, Schuurink RC, Audenaert K. Green leaf volatile production by plants: a meta-analysis. THE NEW PHYTOLOGIST 2018; 220:666-683. [PMID: 28665020 DOI: 10.1111/nph.14671] [Citation(s) in RCA: 185] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 05/02/2017] [Indexed: 05/19/2023]
Abstract
666 I. Introduction 667 II. Biosynthesis 667 III. Meta-analysis 669 IV. The type of stress influences the total amount of GLVs released 669 V. Herbivores can modulate the wound-induced release of GLVs 669 VI. Fungal infection greatly induces GLV production 672 VII. Monocots and eudicots respond differentially to different types of stress 673 VIII. The type of stress does not influence the proportion of GLVs per chemical class 673 IX. The type of stress does influence the isomeric ratio within each chemical class 674 X. GLVs: from signal perception to signal transduction 676 XI. GLVs influence the C/N metabolism 677 XII. Interaction with plant hormones 678 XIII. General conclusions and unanswered questions 678 Acknowledgements 679 References 679 SUMMARY: Plants respond to stress by releasing biogenic volatile organic compounds (BVOCs). Green leaf volatiles (GLVs), which are abundantly produced across the plant kingdom, comprise an important group within the BVOCs. They can repel or attract herbivores and their natural enemies; and they can induce plant defences or prime plants for enhanced defence against herbivores and pathogens and can have direct toxic effects on bacteria and fungi. Unlike other volatiles, GLVs are released almost instantly upon mechanical damage and (a)biotic stress and could thus function as an immediate and informative signal for many organisms in the plant's environment. We used a meta-analysis approach in which data from the literature on GLV production during biotic stress responses were compiled and interpreted. We identified that different types of attackers and feeding styles add a degree of complexity to the amount of emitted GLVs, compared with wounding alone. This meta-analysis illustrates that there is less variation in the GLV profile than we presumed, that pathogens induce more GLVs than insects and wounding, and that there are clear differences in GLV emission between monocots and dicots. Besides the meta-analysis, this review provides an update on recent insights into the perception and signalling of GLVs in plants.
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Affiliation(s)
- Maarten Ameye
- Department of Applied Bioscience, Faculty of Bioscience Engineering, Ghent University, Valentin Vaerwyckweg 1, B-9000, Ghent, Belgium
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Silke Allmann
- Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, PO Box 94215, 1090 GE, Amsterdam, the Netherlands
| | - Jan Verwaeren
- Department of Applied Bioscience, Faculty of Bioscience Engineering, Ghent University, Valentin Vaerwyckweg 1, B-9000, Ghent, Belgium
| | - Guy Smagghe
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Geert Haesaert
- Department of Applied Bioscience, Faculty of Bioscience Engineering, Ghent University, Valentin Vaerwyckweg 1, B-9000, Ghent, Belgium
| | - Robert C Schuurink
- Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, PO Box 94215, 1090 GE, Amsterdam, the Netherlands
| | - Kris Audenaert
- Department of Applied Bioscience, Faculty of Bioscience Engineering, Ghent University, Valentin Vaerwyckweg 1, B-9000, Ghent, Belgium
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224
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Junker RR, Kuppler J, Amo L, Blande JD, Borges RM, van Dam NM, Dicke M, Dötterl S, Ehlers BK, Etl F, Gershenzon J, Glinwood R, Gols R, Groot AT, Heil M, Hoffmeister M, Holopainen JK, Jarau S, John L, Kessler A, Knudsen JT, Kost C, Larue-Kontic AAC, Leonhardt SD, Lucas-Barbosa D, Majetic CJ, Menzel F, Parachnowitsch AL, Pasquet RS, Poelman EH, Raguso RA, Ruther J, Schiestl FP, Schmitt T, Tholl D, Unsicker SB, Verhulst N, Visser ME, Weldegergis BT, Köllner TG. Covariation and phenotypic integration in chemical communication displays: biosynthetic constraints and eco-evolutionary implications. THE NEW PHYTOLOGIST 2018; 220:739-749. [PMID: 28256726 DOI: 10.1111/nph.14505] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/29/2017] [Indexed: 05/04/2023]
Abstract
Chemical communication is ubiquitous. The identification of conserved structural elements in visual and acoustic communication is well established, but comparable information on chemical communication displays (CCDs) is lacking. We assessed the phenotypic integration of CCDs in a meta-analysis to characterize patterns of covariation in CCDs and identified functional or biosynthetically constrained modules. Poorly integrated plant CCDs (i.e. low covariation between scent compounds) support the notion that plants often utilize one or few key compounds to repel antagonists or to attract pollinators and enemies of herbivores. Animal CCDs (mostly insect pheromones) were usually more integrated than those of plants (i.e. stronger covariation), suggesting that animals communicate via fixed proportions among compounds. Both plant and animal CCDs were composed of modules, which are groups of strongly covarying compounds. Biosynthetic similarity of compounds revealed biosynthetic constraints in the covariation patterns of plant CCDs. We provide a novel perspective on chemical communication and a basis for future investigations on structural properties of CCDs. This will facilitate identifying modules and biosynthetic constraints that may affect the outcome of selection and thus provide a predictive framework for evolutionary trajectories of CCDs in plants and animals.
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Affiliation(s)
- Robert R Junker
- Department of Ecology and Evolution, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
| | - Jonas Kuppler
- Department of Ecology and Evolution, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
| | - Luisa Amo
- Department of Animal Ecology, Netherlands Institute of Ecology (NIOO-KNAW), NL-6700, EH Wageningen, the Netherlands
- Department of Evolutionary Ecology, Museo Nacional de Ciencias Naturales (CSIC), 28006, Madrid, Spain
| | - James D Blande
- Department of Environmental and Biological Sciences, University of Eastern Finland, 70211, Kuopio, Finland
| | - Renee M Borges
- Centre for Ecological Sciences, Indian Institute of Science, Bangalore, 560012, India
| | - Nicole M van Dam
- German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig/Friedrich-Schiller-Universität Jena, Deutscher Platz 5e, 04103, Leipzig, Germany
| | - Marcel Dicke
- Laboratory of Entomology, Wageningen University, PO Box 16, 6700 AA, Wageningen, the Netherlands
| | - Stefan Dötterl
- Department of Ecology and Evolution, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
| | - Bodil K Ehlers
- Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark
| | - Florian Etl
- Department of Ecology and Evolution, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
- Department of Botany and Biodiversity Research, University of Vienna, 1030, Vienna, Austria
| | - Jonathan Gershenzon
- Department of Biochemistry, Max-Planck Institute for Chemical Ecology, 07745, Jena, Germany
| | - Robert Glinwood
- Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Box 7043, S750 07, Uppsala, Sweden
| | - Rieta Gols
- Laboratory of Entomology, Wageningen University, PO Box 16, 6700 AA, Wageningen, the Netherlands
| | - Astrid T Groot
- Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, 1090 GE, Amsterdam, the Netherlands
- Department of Entomology, Max Planck Institute for Chemical Ecology, 07745, Jena, Germany
| | - Martin Heil
- Departamento de Ingeniería Genética, CINVESTAV - Irapuato, Irapuato, CP 36821, México
| | - Mathias Hoffmeister
- Department of Ecology and Evolution, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
| | - Jarmo K Holopainen
- Department of Environmental and Biological Sciences, University of Eastern Finland, 70211, Kuopio, Finland
| | - Stefan Jarau
- Institute for Neurobiology, Ulm University, Helmholtzstr. 10/1, 89081, Ulm, Germany
| | - Lena John
- Institute for Neurobiology, Ulm University, Helmholtzstr. 10/1, 89081, Ulm, Germany
| | - Andre Kessler
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, 14853, USA
| | - Jette T Knudsen
- Deptartment of Biology, Lund University, SE 223 62, Lund, Sweden
- Nattaro Labs AB, Medicon Village, 223 81, Lund, Sweden
| | - Christian Kost
- Max Planck Institute for Chemical Ecology, Research Group Experimental Ecology and Evolution, 07745, Jena, Germany
- Department of Ecology, School of Biology/Chemistry, University of Osnabrück, 49074, Osnabrück, Germany
| | - Anne-Amélie C Larue-Kontic
- Department of Ecology and Evolution, University of Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria
| | - Sara Diana Leonhardt
- Department of Animal Ecology and Tropical Biology, Würzburg University, 97074, Würzburg, Germany
| | - Dani Lucas-Barbosa
- Laboratory of Entomology, Wageningen University, PO Box 16, 6700 AA, Wageningen, the Netherlands
| | - Cassie J Majetic
- Department of Biology, Saint Mary's College, Notre Dame, IN, 46556, USA
| | - Florian Menzel
- Institute of Zoology, University of Mainz, 55128, Mainz, Germany
| | - Amy L Parachnowitsch
- Plant Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, Uppsala, 75236, Sweden
| | - Rémy S Pasquet
- Department of ECOBIO, IRD, 44 Bd de Dunkerque, 13572, Marseille Cedex 02, France
| | - Erik H Poelman
- Laboratory of Entomology, Wageningen University, PO Box 16, 6700 AA, Wageningen, the Netherlands
| | - Robert A Raguso
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY, 14853, USA
| | - Joachim Ruther
- Institute of Zoology, University of Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
| | - Florian P Schiestl
- Department of Systematic and Evolutionary Botany, University of Zürich, Zollikerstrasse 107, 8008, Zürich, Switzerland
| | - Thomas Schmitt
- Department of Animal Ecology and Tropical Biology, Würzburg University, 97074, Würzburg, Germany
| | - Dorothea Tholl
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Sybille B Unsicker
- Department of Biochemistry, Max-Planck Institute for Chemical Ecology, 07745, Jena, Germany
| | - Niels Verhulst
- Laboratory of Entomology, Wageningen University, PO Box 16, 6700 AA, Wageningen, the Netherlands
| | - Marcel E Visser
- Department of Animal Ecology, Netherlands Institute of Ecology (NIOO-KNAW), NL-6700, EH Wageningen, the Netherlands
| | - Berhane T Weldegergis
- Laboratory of Entomology, Wageningen University, PO Box 16, 6700 AA, Wageningen, the Netherlands
| | - Tobias G Köllner
- Department of Biochemistry, Max-Planck Institute for Chemical Ecology, 07745, Jena, Germany
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225
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Palmer-Young EC, Farrell IW, Adler LS, Milano NJ, Egan PA, Junker RR, Irwin RE, Stevenson PC. Chemistry of floral rewards: intra- and interspecific variability of nectar and pollen secondary metabolites across taxa. ECOL MONOGR 2018. [DOI: 10.1002/ecm.1335] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Evan C. Palmer-Young
- Department of Biology; University of Massachusetts at Amherst; Amherst Massachusetts 01003 USA
| | - Iain W. Farrell
- Royal Botanic Gardens, Kew; Richmond Surrey TW9 3AB United Kingdom
| | - Lynn S. Adler
- Department of Biology; University of Massachusetts at Amherst; Amherst Massachusetts 01003 USA
| | - Nelson J. Milano
- Department of Biology; University of Massachusetts at Amherst; Amherst Massachusetts 01003 USA
| | - Paul A. Egan
- Department of Plant Protection Biology; Swedish University of Agricultural Sciences; SE-23053 Alnarp Sweden
| | - Robert R. Junker
- Department of Bioscience; University of Salzburg; Hellbrunnerstrasse 34 5020 Salzburg Austria
| | - Rebecca E. Irwin
- Department of Applied Ecology; North Carolina State University; Raleigh North Carolina 27695 USA
| | - Philip C. Stevenson
- Royal Botanic Gardens, Kew; Richmond Surrey TW9 3AB United Kingdom
- University of Greenwich; Medway ME4 4 TB United Kingdom
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226
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Volatiles from Aquilaria sinensis damaged by Heortia vitessoides larvae deter the conspecific gravid adults and attract its predator Cantheconidea concinna. Sci Rep 2018; 8:15067. [PMID: 30305665 PMCID: PMC6180080 DOI: 10.1038/s41598-018-33404-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 09/27/2018] [Indexed: 01/20/2023] Open
Abstract
The effects of induced plant responses on herbivores are categorised as direct, by reducing herbivore development, or indirect, by affecting the performance of natural enemies. Here, we investigated a tritrophic system, which included the herbivore Heortia vitessoides, its host plant Aquilaria sinensis, and its predator Cantheconidea concinna. Herbivore-damaged A. sinensis plants released significantly greater amounts of volatiles than undamaged and mechanically damaged plants, with an obvious temporal trend. One day after initial herbivore damage, A. sinensis plants released large amounts of volatile compounds. Volatile compounds release gradually decreased over the next 3 d. The composition and relative concentrations of the electroantennographic detection (EAD)-active compounds, emitted after herbivore damage, varied significantly over the 4-d measurement period. In wind tunnel bioassays, mated H. vitessoides females showed a preference for undamaged plants over herbivore and mechanically damaged A. sinensis plants. In Y-tube bioassays, C. concinna preferred odours from herbivore-damaged plants to those from undamaged plants, especially after the early stages of insect attack. Our results indicate that the herbivore-induced compounds produced in response to attack by H. vitessoides larvae on A. sinensis plants could be used by both the herbivores themselves and their natural enemies to locate suitable host plants and prey, respectively.
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227
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Yarou BB, Bawin T, Boullis A, Heukin S, Lognay G, Verheggen FJ, Francis F. Oviposition deterrent activity of basil plants and their essentials oils against Tuta absoluta (Lepidoptera: Gelechiidae). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:29880-29888. [PMID: 28785944 DOI: 10.1007/s11356-017-9795-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 07/19/2017] [Indexed: 05/12/2023]
Abstract
The leafminer Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) is one of the most important pests of tomato, reducing crop yields by up to 100% in greenhouses and fields, in several countries globally. Because synthetic insecticides lead to resistance and have adverse effects on natural enemies and the health of producers, alternative control methods are needed. In this study, we assessed the oviposition-deterring effect of basil plants, Ocimum gratissimum L. and O. basilicum L. (Lamiaceae), using dual-choice behavioural assays performed in flight tunnels. We found that both plants significantly reduced T. absoluta oviposition behaviour on a tomato plant located nearby. To evaluate the potential effect of basil volatile organic compounds, we formulated essential oils of both plant species in paraffin oil, and observed a similar oviposition-deterring effect. Gas chromatography analyses detected 18 constituents in these essential oils which the major constituents included thymol (33.3%), p-cymene (20.4%), γ-terpinene (16.9%), myrcene (3.9%) in O. gratissimum and estragol (73.8%), linalool (8.6%), β-elemene (2.9%) and E-β-ocimene (2.6%) in O. basilicum. Twenty and 33 compounds were identified of the volatiles collected on O. gratissimum and O. basilicum plants, respectively. The main components include the following: p-cymene (33.5%), γ-terpinene (23.6%), α-terpinene (7.2%), α-thujene (6.7%) and E-α-bergamotene (38.9%) in O. gratissimum, and methyl eugenol (26.1%), E-β-ocimene (17.7%), and linalool (9.4%) in O. basilicum. Four compounds (α-pinene, β-pinene, Myrcene, Limonene) were common in essential oils and plants. Our results suggest the valuable potential of basil and associated essential oils as a component of integrated management strategies against the tomato leafminer.
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Affiliation(s)
- Boni Barthélémy Yarou
- Functional and Evolutionary Entomology, Agro Biochem Department, Gembloux Agro-bio Tech, University of Liege (ULg), Passage des Déportés, 2, 5030, Gembloux, Belgium.
| | - Thomas Bawin
- Functional and Evolutionary Entomology, Agro Biochem Department, Gembloux Agro-bio Tech, University of Liege (ULg), Passage des Déportés, 2, 5030, Gembloux, Belgium
| | - Antoine Boullis
- Functional and Evolutionary Entomology, Agro Biochem Department, Gembloux Agro-bio Tech, University of Liege (ULg), Passage des Déportés, 2, 5030, Gembloux, Belgium
| | - Stéphanie Heukin
- Analytical Chemistry, Agro Biochem Department, Gembloux Agro-bio Tech, University of Liege (ULg), Passage des Déportés, 2, 5030, Gembloux, Belgium
| | - Georges Lognay
- Analytical Chemistry, Agro Biochem Department, Gembloux Agro-bio Tech, University of Liege (ULg), Passage des Déportés, 2, 5030, Gembloux, Belgium
| | - François Jean Verheggen
- Functional and Evolutionary Entomology, Agro Biochem Department, Gembloux Agro-bio Tech, University of Liege (ULg), Passage des Déportés, 2, 5030, Gembloux, Belgium
| | - Frédéric Francis
- Functional and Evolutionary Entomology, Agro Biochem Department, Gembloux Agro-bio Tech, University of Liege (ULg), Passage des Déportés, 2, 5030, Gembloux, Belgium
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228
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Njuguna PK, Murungi LK, Fombong A, Teal PEA, Beck JJ, Torto B. Cucumber and Tomato Volatiles: Influence on Attraction in the Melon Fly Zeugodacus cucurbitate (Diptera: Tephritidae). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:8504-8513. [PMID: 30041516 DOI: 10.1021/acs.jafc.8b03452] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The main hosts of the melon fly Zeugodacus cucurbitate are cultivated and wild cucurbitaceous plants. In eastern Africa, the melon fly is a major pest of the Solanaceae plant Solanum lycopersicum (tomato). We hypothesized that shared species-specific volatiles may play a role in host attraction. We tested this hypothesis by comparing the olfactory responses of the melon fly to Cucumis sativus (cucumber) (Cucurbitaceae) and tomato plant odors in behavioral and electrophysiological assays, followed by chemical analysis to identify the key compounds mediating the interactions. Our results identified 13 shared components between cucumber and tomato plant odors. A synthetic blend of seven of the shared components dominated by monoterpenes at concentrations mimicking the volatile bouquet of cucumber and tomato attracted both sexes of the melon fly. Our results suggest that the presence and quantity of specific compounds in host odors are the main predictors for host recognition in Z. cucurbitate.
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Affiliation(s)
- Peter K Njuguna
- International Centre of Insect Physiology and Ecology ( icipe), P.O. Box 30772-00100, Nairobi 00100 , Kenya
- Jomo Kenyatta University of Agriculture and Technology , P.O. Box 62000-00200, Nairobi 00200 , Kenya
| | - Lucy K Murungi
- Jomo Kenyatta University of Agriculture and Technology , P.O. Box 62000-00200, Nairobi 00200 , Kenya
| | - Ayuka Fombong
- International Centre of Insect Physiology and Ecology ( icipe), P.O. Box 30772-00100, Nairobi 00100 , Kenya
| | - Peter E A Teal
- Chemistry Research Unit, Center for Medical, Agricultural and Veterinary Entomology, Agricultural Research Service , U.S. Department of Agriculture , 1700 SW 23rd Drive , Gainesville , Florida 32608 , United States
| | - John J Beck
- Chemistry Research Unit, Center for Medical, Agricultural and Veterinary Entomology, Agricultural Research Service , U.S. Department of Agriculture , 1700 SW 23rd Drive , Gainesville , Florida 32608 , United States
| | - Baldwyn Torto
- International Centre of Insect Physiology and Ecology ( icipe), P.O. Box 30772-00100, Nairobi 00100 , Kenya
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229
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Magalhães DM, Borges M, Laumann RA, Woodcock CM, Withall DM, Pickett JA, Birkett MA, Blassioli-Moraes MC. Identification of Volatile Compounds Involved in Host Location by Anthonomus grandis (Coleoptera: Curculionidae). Front Ecol Evol 2018. [DOI: 10.3389/fevo.2018.00098] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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230
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Mella VSA, Possell M, Troxell-Smith SM, McArthur C. Visit, consume and quit: Patch quality affects the three stages of foraging. J Anim Ecol 2018; 87:1615-1626. [PMID: 29995984 DOI: 10.1111/1365-2656.12882] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 06/13/2018] [Indexed: 02/01/2023]
Abstract
Foraging is a three-stage process during which animals visit patches, consume food and quit. Foraging theory exploring relative patch quality has mostly focused on patch use and quitting decisions, ignoring the first crucial step for any forager: finding food. Yet, the decision to visit a patch is just as important as the decision to quit, as quitting theories can only be used if animals visit patches in the first place. Therefore, to better understand the foraging process and predict its outcomes, it is necessary to explore its three stages together. We used the common brushtail possum (Trichosurus vulpecula) as a model to investigate foraging decisions in response to food varying in quality. In particular, we tested whether patch nutritional quality affected the following: (1) patch visits; (2) behaviours at the patch during a foraging visit; and (3) patch quitting decisions (quantified using giving up density-GUD). Free-ranging possums were presented with diets varying in nitrogen content and concomitantly volatile organic compound (VOC) composition at feeding stations in the wild. We found that possums were able to distinguish between different quality foods from afar, despite the location of the diets changed daily. Possums used VOC (i.e. odour cues) emitted by the diets to find and select patches from a distance. High-quality diets with higher protein and lower fibre were visited more often and for longer. Possums spent more time foraging on diets high in nutritional content, resulting in lower GUDs. Our study provides important quantitative evidence that foraging efficiency plays out during all the three stages of the foraging process (i.e. visit, consume and quit), and demonstrates the significance of considering all these stages together in future studies and foraging models. Sensory cues such as food odours play a critical role in helping foragers, including mammalian herbivores, find high-quality food. This allows foragers to make quick, accurate and important decisions about food patches well before patch quitting decisions come into play.
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Affiliation(s)
- Valentina S A Mella
- School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales, Australia
| | - Malcolm Possell
- School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales, Australia
| | - Sandra M Troxell-Smith
- Department of Biological Sciences, University of Illinois at Chicago, Chicago, Illinois.,Department of Biological Sciences, Oakland University, Rochester, Minnesota
| | - Clare McArthur
- School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales, Australia
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231
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Ngah N, Thomas RL, Shaw MW, Fellowes MDE. Asymptomatic Host Plant Infection by the Widespread Pathogen Botrytis cinerea Alters the Life Histories, Behaviors, and Interactions of an Aphid and Its Natural Enemies. INSECTS 2018; 9:E80. [PMID: 29986404 PMCID: PMC6164234 DOI: 10.3390/insects9030080] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 06/23/2018] [Accepted: 07/03/2018] [Indexed: 01/13/2023]
Abstract
Plant pathogens can profoundly affect host plant quality as perceived by their insect herbivores, with potentially far-reaching implications for the ecology and structure of insect communities. Changes in host plants may have direct effects on the life-histories of their insect herbivores, which can then influence their value as prey to their natural enemies. While there have been many studies that have explored the effects of infection when plants show symptoms of disease, little is understood about how unexpressed infection may affect interactions at higher trophic levels. We examined how systemic, asymptomatic, and seed-borne infection by the ubiquitous plant pathogen Botrytis cinerea, infecting two varieties of the lettuce Lactuca sativa, affected aphids (the green peach aphid, Myzus persicae) and two widely used biocontrol agents (the parasitoid Aphidius colemani and the ladybird predator Adalia bipunctata). Lettuce varieties differed in host plant quality. Asymptomatic infection reduced chlorophyll content and dry weight of host plants, irrespective of plant variety. Aphids reared on asymptomatic plants were smaller, had reduced off-plant survival time and were less fecund than aphids reared on uninfected plants. Parasitoids showed reduced attack rates on asymptomatically infected plants, and wasps emerging from hosts reared on such plants were smaller and showed reduced starvation resistance. When given a choice in an olfactometer, aphids preferentially chose uninfected plants of one variety (Tom Thumb) but showed no preference with the second (Little Gem) variety. Parasitoids preferentially chose aphids on uninfected plants, irrespective of host plant variety, but ladybirds did not show any such preference. These results suggest that the reduced quality of plants asymptomatically infected by Botrytis cinerea negatively affects the life history of aphids and their parasitoids, and alters the behaviors of aphids and parasitoids, but not of ladybirds. Fungal pathogens are ubiquitous in nature, and this work shows that even when host plants are yet to show symptoms, pathogens can affect interactions between insect herbivores and their natural enemies. This is likely to have important implications for the success of biological control programs.
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Affiliation(s)
- Norhayati Ngah
- People and Wildlife Research Group, School of Biological Sciences, University of Reading, Whiteknights, Reading, Berkshire RG6 6AJ, UK.
- Fakulti Biosumber dan Industri Makanan, Universiti Sultan Zainal Abidin, Besut Terengganu 22200, Malaysia.
| | - Rebecca L Thomas
- People and Wildlife Research Group, School of Biological Sciences, University of Reading, Whiteknights, Reading, Berkshire RG6 6AJ, UK.
- School of Biological Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK.
| | - Michael W Shaw
- School of Agriculture, Policy and Development, University of Reading, Whiteknights, Reading, Berkshire RG6 6AR, UK.
| | - Mark D E Fellowes
- People and Wildlife Research Group, School of Biological Sciences, University of Reading, Whiteknights, Reading, Berkshire RG6 6AJ, UK.
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232
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Maize Chlorotic Mottle Virus Induces Changes in Host Plant Volatiles that Attract Vector Thrips Species. J Chem Ecol 2018; 44:681-689. [DOI: 10.1007/s10886-018-0973-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 05/19/2018] [Accepted: 05/22/2018] [Indexed: 11/25/2022]
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233
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Mills NJ, Heimpel GE. Could increased understanding of foraging behavior help to predict the success of biological control? CURRENT OPINION IN INSECT SCIENCE 2018; 27:26-31. [PMID: 30025631 DOI: 10.1016/j.cois.2018.02.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 02/05/2018] [Accepted: 02/07/2018] [Indexed: 06/08/2023]
Abstract
Importation biological control, the introduction of a specialist natural enemy from the region of origin of an invasive pest or weed, has been practiced for more than 100 years and has provided some iconic success stories, but also a number of failures. To improve both the success and safety of biological control in the future it is important to consider all opportunities that can help to transform biological control into a more predictive science. Once established, whether or not an imported natural enemy can reduce the abundance and distribution of an invasive host, likely depends on a suite of life history and behavioral traits that include phenological synchronization and foraging efficiency among many others. One key aspect of foraging efficiency is how individuals respond to the patchy distribution of hosts in a spatially fragmented environment when facing potential competition and predation risk. Another is what distributions of natural enemy foraging effort lead to the greatest temporal reduction in mean host density among patches. Here we explore the current theoretical framework for natural enemy foraging behavior and find some evidence that a weak resource dilution distribution of natural enemies among patches might be an important trait for improving the success of importation biological control.
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Affiliation(s)
- Nicholas J Mills
- Department of Environmental Science Policy and Management, University of California, Berkeley, CA 94706-3114, USA.
| | - George E Heimpel
- Department of Entomology, University of Minnesota, St. Paul, MN 55108, USA
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234
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Ripe coffee berry volatiles repel second instar nymphs of Antestia bugs (Heteroptera: Pentatomidae: Antestiopsis thunbergii). CHEMOECOLOGY 2018. [DOI: 10.1007/s00049-018-0259-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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235
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Molnár BP, Boddum T, Hill SR, Hansson BS, Hillbur Y, Birgersson G. Ecological and Phylogenetic Relationships Shape the Peripheral Olfactory Systems of Highly Specialized Gall Midges (Cecidomiiydae). Front Physiol 2018; 9:323. [PMID: 29666586 PMCID: PMC5891623 DOI: 10.3389/fphys.2018.00323] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 03/15/2018] [Indexed: 11/13/2022] Open
Abstract
Insects use sensitive olfactory systems to detect relevant host volatiles and avoid unsuitable hosts in a complex environmental odor landscape. Insects with short lifespans, such as gall midges (Diptera: Cecidomyiidae), are under strong selection pressure to detect and locate suitable hosts for their offspring in a short period of time. Ephemeral gall midges constitute excellent models for investigating the role of olfaction in host choice, host shift, and speciation. Midges mate near their site of emergence and females migrate in order to locate hosts for oviposition, thus females are expected to be more responsive to olfactory cues emitted by the host compared to males. In this study, we explored the correlation between host choice and the function of the peripheral olfactory system in 12 species of gall midges, including species with close phylogenetic relationships that use widely different host plants and more distantly related gall midge species that use similar hosts. We tested the antennal responses of males and females of the 12 species to a blend of 45 known insect attractants using coupled gas chromatographic-electroantennographic detection. When the species-specific response profiles of the gall midges were compared to a newly generated molecular-based phylogeny, we found they responded to the compounds in a sex- and species-specific manner. We found the physiological response profiles of species that use annual host plants, and thus have to locate their host every season, are similar for species with similar hosts despite large phylogenetic distances. In addition, we found closely related species with perennial hosts demonstrated odor response profiles that were consistent with their phylogenetic history. The ecology of the gall midges affects the tuning of the peripheral olfactory system, which in turn demonstrates a correlation between olfaction and speciation in the context of host use.
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Affiliation(s)
- Béla P Molnár
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden.,Centre for Agricultural Research, Plant Protection Institute, Hungarian Academy of Sciences, Budapest, Hungary
| | - Tina Boddum
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Sharon R Hill
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Bill S Hansson
- Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Ylva Hillbur
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden.,General Directorate, International Institute for Tropical Agriculture, Ibadan, Nigeria
| | - Göran Birgersson
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden
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236
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Bian L, Cai XM, Luo ZX, Li ZQ, Xin ZJ, Chen ZM. Design of an Attractant for Empoasca onukii (Hemiptera: Cicadellidae) Based on the Volatile Components of Fresh Tea Leaves. JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:629-636. [PMID: 29361007 DOI: 10.1093/jee/tox370] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Indexed: 06/07/2023]
Abstract
The tea leafhopper, Empoasca onukii Matsuda, is a serious pest of the tea plant. E. onukii prefers to inhabit vigorously growing tender tea leaves. The host selection of E. onukii adults may be associated with plant volatile compounds (VOCs). We sought to identify potentially attractive VOCs from tea leaves at three different ages and test the behavioral responses of E. onukii adults to synthetic VOC blends in the laboratory and field to aid in developing an E. onukii adult attractant. In darkness, the fresh or mature tea leaves of less than 1-mo old could attract more leafhoppers than the mature branches (MB) that had many older leaves (leaf age >1 mo). Volatile analysis showed that the VOC composition of the fresh leaves was the same as that of the mature leaves, but linalool and indole were not at detectable levels in VOCs from the MB. Moreover, the mass ratio differed for each common volatile in the three types of tea leaves. When under competition with volatiles from the MB, the leafhoppers showed no significant tropism to each single volatile but could be attracted by the synthetic volatile blend imitating the fresh leaves. With the removal of some volatile components, the effective synthetic volatile blend was mixed with (Z)-3-hexen-1-ol, (Z)-3-hexenyl acetate, and linalool at a mass ratio of 0.6:23:12.6. These three volatiles may be the key components for the host selection of E. onukii adults and could be used as an attractant in tea gardens.
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Affiliation(s)
- Lei Bian
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, Xihu, Hangzhou, China
| | - Xiao-Ming Cai
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, Xihu, Hangzhou, China
| | - Zong-Xiu Luo
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, Xihu, Hangzhou, China
| | - Zhao-Qun Li
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, Xihu, Hangzhou, China
| | - Zhao-Jun Xin
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, Xihu, Hangzhou, China
| | - Zong-Mao Chen
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, Xihu, Hangzhou, China
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237
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Lemmen-Lechelt JK, Wist TJ, Evenden ML. State-Dependent Plasticity in Response to Host-Plant Volatiles in a Long-Lived Moth, Caloptilia fraxinella (Lepidoptera: Gracillariidae). J Chem Ecol 2018; 44:276-287. [DOI: 10.1007/s10886-018-0927-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 01/06/2018] [Accepted: 01/22/2018] [Indexed: 01/03/2023]
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238
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Xu H, Turlings TCJ. Plant Volatiles as Mate-Finding Cues for Insects. TRENDS IN PLANT SCIENCE 2018; 23:100-111. [PMID: 29229187 DOI: 10.1016/j.tplants.2017.11.004] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/06/2017] [Accepted: 11/13/2017] [Indexed: 05/04/2023]
Abstract
Plant volatiles are used not only by herbivorous insects to find their host plants, but also by the natural enemies of the herbivores to find their prey. There is also increasing evidence that plant volatiles, in addition to species-specific pheromones, help these insects to find mating partners. Plant structures such as flowers, fruit, and leaves are frequently rendezvous sites for mate-seeking insects. Here we propose that the combined use of plant volatiles and pheromones can efficiently guide insects to these sites, where they will have access to both mates and food. This notion is supported by the fact that plant volatiles can stimulate the release of sex pheromones and can render various insects more receptive to potential mates.
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Affiliation(s)
- Hao Xu
- Laboratory of Fundamental and Applied Research in Chemical Ecology (FARCE), Institute of Biology, University of Neuchâtel, CH-2000 Neuchâtel, Switzerland.
| | - Ted C J Turlings
- Laboratory of Fundamental and Applied Research in Chemical Ecology (FARCE), Institute of Biology, University of Neuchâtel, CH-2000 Neuchâtel, Switzerland.
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239
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The preference choices of Conopomorpha sinensis Bradley (Lepidoptera: Gracilariidae) for litchi based on its host surface characteristics and volatiles. Sci Rep 2018; 8:2013. [PMID: 29386547 PMCID: PMC5792485 DOI: 10.1038/s41598-018-20383-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 01/15/2018] [Indexed: 11/29/2022] Open
Abstract
Conopomorpha sinensis Bradley is a host-specific pest of Litchi chinensis and Euphoria longan. Here, we demonstrated that C. sinensis has evolved special physical and chemical mechanisms for host plant location that enable it to survive and reproduce. Females favored laying their eggs on the convex surface of litchi fruit that had particular volatile characteristics. Experiments using a H-type olfactometer showed that female C. sinensis were attracted to litchi flowers, tender shoots, immature fruits, and mature fruits, with the highest attraction rate to mature fruits (74.67 ± 2.31%). There were no significant differences in the attraction of male C. sinensis to different litchi tissues. Further oviposition preference tests using the pericarp, pulp, and seeds of mature litchi fruits revealed that female C. sinensis prefer to lay their eggs on the pericarp. Litchi volatiles were found to be important in attracting C. sinensis to fruits for oviposition. Analysis of volatiles from different litchi tissues by HS-SPME-GC-MS revealed 31 similar volatiles, some of which may be important in the oviposition preference choices of C. sinensis on litchi fruit.
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240
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Gregg PC, Del Socorro AP, Landolt PJ. Advances in Attract-and-Kill for Agricultural Pests: Beyond Pheromones. ANNUAL REVIEW OF ENTOMOLOGY 2018; 63:453-470. [PMID: 29058978 DOI: 10.1146/annurev-ento-031616-035040] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Attract-and-kill has considerable potential as a tactic in integrated management of pests of agricultural crops, but the use of sex pheromones as attractants is limited by male multiple mating and immigration of mated females into treated areas. Attractants for both sexes, and particularly females, would minimize these difficulties. Volatile compounds derived from plants or fermentation of plant products can attract females and have been used in traps for monitoring and control, and in sprayable attract-and-kill formulations or bait stations. Recent advances in fundamental understanding of insect responses to plant volatiles should contribute to the development of products that can help manage a wide range of pests with few impacts on nontarget organisms, but theory must be tempered with pragmatism in the selection of volatiles and toxicants and in defining their roles in formulations. Market requirements and regulatory factors must be considered in parallel with scientific constraints if successful products are to be developed.
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Affiliation(s)
- Peter C Gregg
- University of New England, Armidale, New South Wales 2351, Australia; ,
| | | | - Peter J Landolt
- Fruit and Vegetable Insect Research Unit, Agricultural Research Service, US Department of Agriculture, Wapato, Washington 98951, USA;
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241
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Salvagnin U, Malnoy M, Thöming G, Tasin M, Carlin S, Martens S, Vrhovsek U, Angeli S, Anfora G. Adjusting the scent ratio: using genetically modified Vitis vinifera plants to manipulate European grapevine moth behaviour. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:264-271. [PMID: 28574666 PMCID: PMC5785346 DOI: 10.1111/pbi.12767] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/08/2017] [Accepted: 05/26/2017] [Indexed: 05/04/2023]
Abstract
Herbivorous insects use olfactory cues to locate their host plant within a complex olfactory landscape. One such example is the European grapevine moth Lobesia botrana, a key pest of the grape in the Palearctic region, which recently expanded both its geographical and host plant range. Previous studies have showed that a synthetic blend of the three terpenoids, (E)-β-caryophyllene, (E)-β-farnesene and (E)-4,8-dimethyl-1,3,7-nonatriene (DMNT), was as attractive for the moth as the complete grape odour profile in laboratory conditions. The same studies also showed that the specific ratio of these compounds in the grape bouquet was crucial because a percentage variation in any of the three volatiles resulted in almost complete inhibition of the blend's attractiveness. Here, we report on the creation of stable grapevine transgenic lines, with modified (E)-β-caryophyllene and (E)-β-farnesene emission and thus with an altered ratio compared to the original plants. When headspace collections from these plants were tested in wind tunnel behavioural assays, they were less attractive than control extracts. This result was confirmed by testing synthetic blends imitating the ratio found on natural and transformed plants, as well as by testing the plants themselves. With this evidence, we suggest that a strategy based on volatile ratio modification may also interfere with the host-finding behaviour of L. botrana in the field, creating avenues for new pest control methods.
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Affiliation(s)
- Umberto Salvagnin
- Faculty of Science and TechnologyFree University of Bozen‐BolzanoBolzanoItaly
- Research and Innovation CentreFondazione Edmund MachS. Michele all'Adige (TN)Italy
| | - Mickael Malnoy
- Research and Innovation CentreFondazione Edmund MachS. Michele all'Adige (TN)Italy
| | - Gunda Thöming
- Norwegian Institute of Bioeconomy Research, NIBIOÅsNorway
| | - Marco Tasin
- Norwegian Institute of Bioeconomy Research, NIBIOÅsNorway
- Swedish University of Agricultural SciencesAlnarpSweden
| | - Silvia Carlin
- Research and Innovation CentreFondazione Edmund MachS. Michele all'Adige (TN)Italy
| | - Stefan Martens
- Research and Innovation CentreFondazione Edmund MachS. Michele all'Adige (TN)Italy
| | - Urska Vrhovsek
- Research and Innovation CentreFondazione Edmund MachS. Michele all'Adige (TN)Italy
| | - Sergio Angeli
- Faculty of Science and TechnologyFree University of Bozen‐BolzanoBolzanoItaly
| | - Gianfranco Anfora
- Research and Innovation CentreFondazione Edmund MachS. Michele all'Adige (TN)Italy
- Center Agriculture Food Environment (CAFE)University of TrentoS. Michele all'Adige (TN)Italy
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242
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Knudsen GK, Norli HR, Tasin M. The Ratio between Field Attractive and Background Volatiles Encodes Host-Plant Recognition in a Specialist Moth. FRONTIERS IN PLANT SCIENCE 2017; 8:2206. [PMID: 29312430 PMCID: PMC5744616 DOI: 10.3389/fpls.2017.02206] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 12/15/2017] [Indexed: 06/07/2023]
Abstract
Volatiles emitted by plants convey an array of information through different trophic levels. Animals such as host-seeking herbivores encounter plumes with filaments from both host and non-host plants. While studies showed a behavioral effect of non-host plants on herbivore host location, less information is available on how a searching insect herbivore perceives and flies upwind to a host-plant odor plume within a background of non-host volatiles. We hypothesized here that herbivorous insects in search of a host-plant can discriminate plumes of host and non-host plants and that the taxonomic relatedness of the non-host have an effect on finding the host. We also predicted that the ratio between certain plant volatiles is cognized as host-plant recognition cue by a receiver herbivorous insect. To verify these hypotheses we measured the wind tunnel response of the moth Argyresthia conjugella to the host plant rowan, to non-host plants taxonomically related (Rosaceae, apple and pear) or unrelated to the host (Pinaceae, spruce) and to binary combination of host and non-host plants. Volatiles were collected from all plant combinations and delivered to the test insect via an ultrasonic sprayer as an artificial plume. While the response to the rowan as a plant was not affected by the addition of any of the non-host plants, the attraction to the corresponding sprayed headspace decreased when pear or apple but not spruce were added to rowan. A similar result was measured toward the odor exiting a jar where freshly cut plant material of apple or pear or spruce was intermixed with rowan. Dose-response gas-chromatography coupled to electroantennography revealed the presence of seven field attractive and seven background non-attractive antennally active compounds. Although the abundance of field attractive and of some background volatiles decreased in all dual combinations in comparison with rowan alone, an increased amount of the background compounds (3E)-4,8-Dimethyl-1,3,7-nonatriene ((E)-DMNT) and (Z)-3-hexenyl acetate was found in the rowan-apple and rowan-pear but not in the rowan-spruce headspace. A higher ratio between the abundance of each field attractive component and that of (E)-DMNT and (Z)-3-hexenyl acetate was measured for rowan and rowan-spruce in contrast to rowan-pear and rowan-apple headspaces. Our result suggests that the ratio between field attractive and background antennaly active volatiles encodes host-plant recognition in our study system.
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Affiliation(s)
- Geir K Knudsen
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research, Oslo, Norway
| | - Hans R Norli
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research, Oslo, Norway
| | - Marco Tasin
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research, Oslo, Norway
- Integrated Plant Protection, Department of Plant Protection Biology, Swedish University of Agricultural Science, Alnarp, Sweden
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243
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Xu X, Cai X, Bian L, Luo Z, Li Z, Chen Z. Does Background Odor in Tea Gardens Mask Attractants? Screening and Application of Attractants for Empoasca onukii Matsuda. JOURNAL OF ECONOMIC ENTOMOLOGY 2017; 110:2357-2363. [PMID: 29040654 DOI: 10.1093/jee/tox269] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Indexed: 06/07/2023]
Abstract
Plant volatiles help herbivores to locate their hosts, and therefore, they could be used to help develop pesticide-free pest management strategies. To develop an attractant for tea leafhopper (Empoasca onukii), we screened nine tea plant volatile compounds for their attractiveness using Y-tube olfactometer assays. Results indicated that tea leafhoppers significantly preferred ocimene, limonene, (Z)-3-hexenol, and (Z)-3-hexenyl acetate over clean air. These compounds were combined in a blend which lost its attractiveness at concentrations below 10-2 g/ml in liquid paraffin. In field tests, the blend was attractive to leafhoppers only in autumn, but not in summer. Analyses of the tea field background odor showed that all four components of the blend were present at much higher concentrations in summer (0.05-0.001 ng/liter) than in autumn (~10- to 25-fold lower). In field Y-tube bioassays, compared with the tea field background odor, the blend was attractive at a concentration of 10-1 g/ml in liquid paraffin, but not at 10-2 g/ml. These results suggest that field background odor can disrupt the attractiveness of an attractant based on plant volatiles to herbivores.
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Affiliation(s)
- Xiuxiu Xu
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, China
- Shandong Institute of Pomology, Shandong Academy of Agricultural Sciences, China
| | - Xiaoming Cai
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, China
| | - Lei Bian
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, China
| | - Zongxiu Luo
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, China
| | - Zhaoqun Li
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, China
| | - Zongmao Chen
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, China
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244
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Yang L, Hu XP, van Santen E, Zeng XN. Attractiveness of Host Plants at Different Growth Stage to Kudzu Bug, Megacopta cribraria (Heteroptera: Plataspidae): Behavioral Responses to Whole Plant and Constitutive Volatiles. JOURNAL OF ECONOMIC ENTOMOLOGY 2017; 110:2351-2356. [PMID: 29029301 DOI: 10.1093/jee/tox214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Indexed: 06/07/2023]
Abstract
The kudzu bug, Megacopta cribraria (Fabricius), is an invasive pest of soybeans, Glycine max (L.) Merr., that has recently been detected in the United States. This study investigated whether there was a differential attraction of adult bugs to soybean growth stages, and whether the attraction was related to soybean constitutive volatiles. Greenhouse choice assays examined the behavioral orientation preference of adult bugs exposed to four growth stages of whole soybean plants: vegetative (V2), flowering (R1), pod (R3), and seed (R5). Results show that significantly more adults landed on plants in the early reproductive stage R1 than in other stages. Laboratory olfactometer assays also demonstrate that significantly more adult bugs were attracted to R1 plants, with females responding more strongly than males. Both greenhouse and olfactometer assays indicate that the differential attraction of adult bugs to soybean growth stages was mediated by plant constitutive volatiles. These results offer an insight into kudzu bug chemical and behavioral ecology and thus are of great significance for optimizing the timing of field scouting and treatment as well as the development of soybean pest management programs.
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Affiliation(s)
- L Yang
- College of Agriculture, South China Agricultural University, China
- Department of Entomology and Plant Pathology, Auburn University
| | - X P Hu
- Department of Entomology and Plant Pathology, Auburn University
| | - E van Santen
- Statistical Consulting Unit and Agronomy Department, Institute of Food and Agricultural Sciences, University of Florida
| | - X N Zeng
- College of Agriculture, South China Agricultural University, China
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245
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Effects of mating on host selection by female small white butterflies Pieris rapae (Lepidoptera: Pieridae). J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2017; 204:245-255. [DOI: 10.1007/s00359-017-1237-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 09/12/2017] [Accepted: 11/28/2017] [Indexed: 11/26/2022]
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246
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Njihia TN, Torto B, Murungi LK, Irungu J, Mwenda DM, Babin R. Identification of kairomones of second instar nymphs of the variegated coffee bug Antestiopsis thunbergii (Heteroptera: Pentatomidae). CHEMOECOLOGY 2017. [DOI: 10.1007/s00049-017-0248-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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247
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Lihuang K, Zhang Z, Kim K, Huang Q, Lei C. Antennal and behavioral responses of Mythimna separata (Walker) to three plant volatiles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:24953-24964. [PMID: 28918497 DOI: 10.1007/s11356-017-0140-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 09/07/2017] [Indexed: 06/07/2023]
Abstract
The oriental armyworm, Mythimna separata, is distributed widely in eastern Asia and Australia. The response of M.separata to 27 compounds identified from plant volatiles was determined from electroantennography (EAG) and wind tunnel results, which allowed an evaluation of the possible plant volatile compounds. The highest EAG values of males were elicited by trans-2,cis-6-nonadienal, and virgin females by benzyl alcohol. The amplitude in EAG dose-response was in the range of 0.24 to 2.87 mV. In the wind tunnel bioassays, significantly more females showed behavioral responses to wilting leaves and headspace collection of Pterocarya stenoptera rather than control. In addition, significantly more females flew upwind with beta-ocimene compared with the control. The number of females that landed at the source with cis-3-hexen-1-ol, phenylethyl alcohol, trans-2-nonenal, and 2-pentylfuran was significantly different from the number that moved towards control.
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Affiliation(s)
- Kaimei Lihuang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Zhilin Zhang
- Hubei Key Laboratory of Quality Control of Characteristic Fruits and Vegetables, College of Life Science and Technology, Hubei Engineering University, Xiaogan, Hubei, 432000, China
| | - Kilnam Kim
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Qiuying Huang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
| | - Chaoliang Lei
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
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248
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Steiner C, Bozzolan F, Montagné N, Maïbèche M, Chertemps T. Neofunctionalization of "Juvenile Hormone Esterase Duplication" in Drosophila as an odorant-degrading enzyme towards food odorants. Sci Rep 2017; 7:12629. [PMID: 28974761 PMCID: PMC5626784 DOI: 10.1038/s41598-017-13015-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 09/12/2017] [Indexed: 11/08/2022] Open
Abstract
Odorant degrading enzymes (ODEs) are thought to be responsible, at least in part, for olfactory signal termination in the chemosensory system by rapid degradation of odorants in the vicinity of the receptors. A carboxylesterase, specifically expressed in Drosophila antennae, called "juvenile hormone esterase duplication (JHEdup)" has been previously reported to hydrolyse different fruit esters in vitro. Here we functionally characterize JHEdup in vivo. We show that the jhedup gene is highly expressed in large basiconic sensilla that have been reported to detect several food esters. An electrophysiological analysis demonstrates that ab1A olfactory neurons of jhedup mutant flies exhibit an increased response to certain food acetates. Furthermore, mutant flies show a higher sensitivity towards the same odorants in behavioural assays. A phylogenetic analysis reveals that jhedup arose as a duplication of the juvenile hormone esterase gene during the evolution of Diptera, most likely in the ancestor of Schizophora, and has been conserved in all the 12 sequenced Drosophila species. Jhedup exhibits also an olfactory-predominant expression pattern in other Drosophila species. Our results support the implication of JHEdup in the degradation of food odorants in D. melanogaster and propose a neofunctionalization of this enzyme as a bona fide ODE in Drosophilids.
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Affiliation(s)
- Claudia Steiner
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, INRA, CNRS, IRD, Institute of Ecology and Environmental Sciences of Paris, Paris, France
| | - Françoise Bozzolan
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, INRA, CNRS, IRD, Institute of Ecology and Environmental Sciences of Paris, Paris, France
| | - Nicolas Montagné
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, INRA, CNRS, IRD, Institute of Ecology and Environmental Sciences of Paris, Paris, France
| | - Martine Maïbèche
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, INRA, CNRS, IRD, Institute of Ecology and Environmental Sciences of Paris, Paris, France.
| | - Thomas Chertemps
- Sorbonne Universités, UPMC Univ Paris 06, UPEC, INRA, CNRS, IRD, Institute of Ecology and Environmental Sciences of Paris, Paris, France
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249
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Jamieson MA, Burkle LA, Manson JS, Runyon JB, Trowbridge AM, Zientek J. Global change effects on plant-insect interactions: the role of phytochemistry. CURRENT OPINION IN INSECT SCIENCE 2017; 23:70-80. [PMID: 29129286 DOI: 10.1016/j.cois.2017.07.009] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 06/12/2017] [Accepted: 07/19/2017] [Indexed: 05/10/2023]
Abstract
Natural and managed ecosystems are undergoing rapid environmental change due to a growing human population and associated increases in industrial and agricultural activity. Global environmental change directly and indirectly impacts insect herbivores and pollinators. In this review, we highlight recent research examining how environmental change factors affect plant chemistry and, in turn, ecological interactions among plants, herbivores, and pollinators. Recent studies reveal the complex nature of understanding global change effects on plant secondary metabolites and plant-insect interactions. Nonetheless, these studies indicate that phytochemistry mediates insect responses to environmental change. Future research on the chemical ecology of plant-insect interactions will provide critical insight into the ecological effects of climate change and other anthropogenic disturbances. We recommend greater attention to investigations examining interactive effects of multiple environmental change factors in addition to chemically mediated plant-pollinator interactions, given limited research in these areas.
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Affiliation(s)
- Mary A Jamieson
- Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA.
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT 59717, USA
| | - Jessamyn S Manson
- Department of Biology, University of Virginia, Charlottesville, VA 22902, USA
| | - Justin B Runyon
- Rocky Mountain Research Station, USDA Forest Service, Bozeman, MT 59717, USA
| | - Amy M Trowbridge
- Department of Land Resources & Environmental Sciences, Montana State University, Bozeman, MT 59717, USA
| | - Joseph Zientek
- Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA
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250
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Clavijo McCormick A, Grosse-Wilde E, Wheeler D, Mescher MC, Hansson BS, De Moraes CM. Comparing the Expression of Olfaction-Related Genes in Gypsy Moth (Lymantria dispar) Adult Females and Larvae from One Flightless and Two Flight-Capable Populations. Front Ecol Evol 2017. [DOI: 10.3389/fevo.2017.00115] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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