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Antony B, Montagné N, Comte A, Mfarrej S, Jakše J, Capoduro R, Shelke R, Cali K, AlSaleh MA, Persaud K, Pain A, Jacquin-Joly E. Deorphanizing an odorant receptor tuned to palm tree volatile esters in the Asian palm weevil sheds light on the mechanisms of palm tree selection. Insect Biochem Mol Biol 2024; 169:104129. [PMID: 38704126 DOI: 10.1016/j.ibmb.2024.104129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 04/06/2024] [Accepted: 04/28/2024] [Indexed: 05/06/2024]
Abstract
The Asian palm weevil, Rhynchophorus ferrugineus, is a tremendously important agricultural pest primarily adapted to palm trees and causes severe destruction, threatening sustainable palm cultivation worldwide. The host plant selection of this weevil is mainly attributed to the functional specialization of odorant receptors (ORs) that detect palm-derived volatiles. Yet, ligands are known for only two ORs of R. ferrugineus, and we still lack information on the mechanisms of palm tree detection. This study identified a highly expressed antennal R. ferrugineus OR, RferOR2, thanks to newly generated transcriptomic data. The phylogenetic analysis revealed that RferOR2 belongs to the major coleopteran OR group 2A and is closely related to a sister clade containing an R. ferrugineus OR (RferOR41) tuned to the non-host plant volatile and antagonist, α-pinene. Functional characterization of RferOR2 via heterologous expression in Drosophila olfactory neurons revealed that this receptor is tuned to several ecologically relevant palm-emitted odors, most notably ethyl and methyl ester compounds, but not to any of the pheromone compounds tested, including the R. ferrugineus aggregation pheromone. We did not evidence any differential expression of RferOR2 in the antennae of both sexes, suggesting males and females detect these compounds equally. Next, we used the newly identified RferOR2 ligands to demonstrate that including synthetic palm ester volatiles as single compounds and in combinations in pheromone-based mass trapping has a synergistic attractiveness effect to R. ferrugineus aggregation pheromone, resulting in significantly increased weevil catches. Our study identified a key OR from a palm weevil species tuned to several ecologically relevant palm volatiles and represents a significant step forward in understanding the chemosensory mechanisms of host detection in palm weevils. Our study also defines RferOR2 as an essential model for exploring the molecular basis of host detection in other palm weevil species. Finally, our work showed that insect OR deorphanization could aid in identifying novel behaviorally active volatiles that can interfere with weevil host-searching behavior in sustainable pest management applications.
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Affiliation(s)
- Binu Antony
- King Saud University, Chair of Date Palm Research, Center for Chemical Ecology and Functional Genomics, Department of Plant Protection, College of Food and Agricultural Sciences, Riyadh, 11451, Saudi Arabia.
| | - Nicolas Montagné
- INRAE, Sorbonne Université, CNRS, IRD, UPEC, Université Paris Cité, Institute of Ecology and Environmental Sciences of Paris, iEES-Paris, 78000, Versailles, France
| | - Arthur Comte
- INRAE, Sorbonne Université, CNRS, IRD, UPEC, Université Paris Cité, Institute of Ecology and Environmental Sciences of Paris, iEES-Paris, 78000, Versailles, France
| | - Sara Mfarrej
- King Abdullah University of Science and Technology (KAUST), Bioscience Programme, BESE Division, Thuwal, Jeddah, 23955-6900, Saudi Arabia
| | - Jernej Jakše
- University of Ljubljana, Biotechnical Faculty, Agronomy Department, SI-1000, Ljubljana, Slovenia
| | - Rémi Capoduro
- INRAE, Sorbonne Université, CNRS, IRD, UPEC, Université Paris Cité, Institute of Ecology and Environmental Sciences of Paris, iEES-Paris, 78000, Versailles, France
| | - Rajan Shelke
- Don Bosco College of Agriculture, Agricultural Entomology Department, Sulcorna, Goa, 403705, India
| | - Khasim Cali
- The University of Manchester, Department of Chemical Engineering, Manchester, M13 9PL, UK
| | - Mohammed Ali AlSaleh
- King Saud University, Chair of Date Palm Research, Center for Chemical Ecology and Functional Genomics, Department of Plant Protection, College of Food and Agricultural Sciences, Riyadh, 11451, Saudi Arabia
| | - Krishna Persaud
- The University of Manchester, Department of Chemical Engineering, Manchester, M13 9PL, UK
| | - Arnab Pain
- King Abdullah University of Science and Technology (KAUST), Bioscience Programme, BESE Division, Thuwal, Jeddah, 23955-6900, Saudi Arabia
| | - Emmanuelle Jacquin-Joly
- INRAE, Sorbonne Université, CNRS, IRD, UPEC, Université Paris Cité, Institute of Ecology and Environmental Sciences of Paris, iEES-Paris, 78000, Versailles, France
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Sellamuthu G, Naseer A, Hradecký J, Chakraborty A, Synek J, Modlinger R, Roy A. Gene expression plasticity facilitates different host feeding in Ips sexdentatus (Coleoptera: Curculionidae: Scolytinae). Insect Biochem Mol Biol 2024; 165:104061. [PMID: 38151136 DOI: 10.1016/j.ibmb.2023.104061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/30/2023] [Accepted: 12/15/2023] [Indexed: 12/29/2023]
Abstract
Host shift is ecologically advantageous and a crucial driver for herbivore insect speciation. Insects on the non-native host obtain enemy-free space and confront reduced competition, but they must adapt to survive. Such signatures of adaptations can often be detected at the gene expression level. It is astonishing how bark beetles cope with distinct chemical environments while feeding on various conifers. Hence, we aim to disentangle the six-toothed bark beetle (Ips sexdentatus) response against two different conifer defences upon host shift (Scots pine to Norway spruce). We conducted bioassay and metabolomic analysis followed by RNA-seq experiments to comprehend the beetle's ability to surpass two different terpene-based conifer defence systems. Beetle growth rate and fecundity were increased when reared exclusively on spruce logs (alternative host) compared to pine logs (native host). Comparative gene expression analysis identified differentially expressed genes (DEGs) related to digestion, detoxification, transporter activity, growth, signalling, and stress response in the spruce-feeding beetle gut. Transporter genes were highly abundant during spruce feeding, suggesting they could play a role in pumping a wide variety of endogenous and xenobiotic compounds or allelochemicals out. Trehalose transporter (TRET) is also up-regulated in the spruce-fed beetle gut to maintain homeostasis and stress tolerance. RT-qPCR and enzymatic assays further corroborated some of our findings. Taken together, the transcriptional plasticity of key physiological genes plays a crucial role after the host shift and provides vital clues for the adaptive potential of bark beetles on different conifer hosts.
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Affiliation(s)
- Gothandapani Sellamuthu
- Czech University of Life Sciences Prague, Forest Molecular Entomology Lab, Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic; Czech University of Life Sciences Prague, Excellent Team for Mitigation (ETM), Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic
| | - Aisha Naseer
- Czech University of Life Sciences Prague, Forest Molecular Entomology Lab, Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic; Czech University of Life Sciences Prague, Excellent Team for Mitigation (ETM), Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic
| | - Jaromír Hradecký
- Czech University of Life Sciences Prague, Excellent Team for Mitigation (ETM), Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic
| | - Amrita Chakraborty
- Czech University of Life Sciences Prague, Forest Molecular Entomology Lab, Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic; Czech University of Life Sciences Prague, Forest Microbiome Team, Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic
| | - Jiří Synek
- Czech University of Life Sciences Prague, Excellent Team for Mitigation (ETM), Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic
| | - Roman Modlinger
- Czech University of Life Sciences Prague, Excellent Team for Mitigation (ETM), Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic
| | - Amit Roy
- Czech University of Life Sciences Prague, Forest Molecular Entomology Lab, Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic; Czech University of Life Sciences Prague, Excellent Team for Mitigation (ETM), Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic; Czech University of Life Sciences Prague, Forest Microbiome Team, Faculty of Forestry & Wood Sciences, Kamýcká 129, Prague, 16500, Czech Republic.
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Sauka DH, Peralta C, Pérez MP, Molla A, Fernandez-Göbel T, Ocampo F, Palma L. Bacillus thuringiensis Bt_UNVM-84, a Novel Strain Showing Insecticidal Activity against Anthonomus grandis Boheman (Coleoptera: Curculionidae). Toxins (Basel) 2023; 16:4. [PMID: 38276528 PMCID: PMC10819922 DOI: 10.3390/toxins16010004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/16/2023] [Accepted: 12/18/2023] [Indexed: 01/27/2024] Open
Abstract
Bacillus thuringiensis is a Gram-positive bacterium known for its insecticidal proteins effective against various insect pests. However, limited strains and proteins target coleopteran pests like Anthonomous grandis Boheman, causing substantial economic losses in the cotton industry. This study focuses on characterizing a Bacillus sp. strain, isolated from Oncativo (Argentina), which exhibits ovoid to amorphous parasporal crystals and was designated Bt_UNVM-84. Its genome encodes genes for the production of two pairs of binary Vpb1/Vpa2 proteins and three Cry-like proteins showing similarity with different Cry8 proteins. Interestingly, this gene content was found to be conserved in a previously characterized Argentine isolate of B. thuringiensis designated INTA Fr7-4. SDS-PAGE analysis revealed a major band of 130 kDa that is proteolytically processed to an approximately 66-kDa protein fragment by trypsin. Bioassays performed with spore-crystal mixtures demonstrated an interesting insecticidal activity against the cotton boll weevil A. grandis neonate larvae, resulting in 91% mortality. Strain Bt_UNVM-84 is, therefore, an interesting candidate for the efficient biological control of this species, causing significant economic losses in the cotton industry in the Americas.
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Affiliation(s)
- Diego Herman Sauka
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina; (D.H.S.); (C.P.)
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMYZA), Hurlingham, Ciudad Autónoma de Buenos Aires 1686, Argentina;
| | - Cecilia Peralta
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina; (D.H.S.); (C.P.)
- Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Villa María (UNVM), Villa María 1555, Argentina;
- Laboratorio de Control Biotecnológico de Plagas, Instituto BIOTECMED, Departamento de Genética, Universitat de València, 46100 València, Spain
| | - Melisa Paula Pérez
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMYZA), Hurlingham, Ciudad Autónoma de Buenos Aires 1686, Argentina;
| | - Antonella Molla
- Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Villa María (UNVM), Villa María 1555, Argentina;
| | - Tadeo Fernandez-Göbel
- Elytron Biotech S.A., 275 Ing. Enrique Butty Street, Ciudad Autónoma de Buenos Aires C1001, Argentina; (T.F.-G.); (F.O.)
| | - Federico Ocampo
- Elytron Biotech S.A., 275 Ing. Enrique Butty Street, Ciudad Autónoma de Buenos Aires C1001, Argentina; (T.F.-G.); (F.O.)
| | - Leopoldo Palma
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina; (D.H.S.); (C.P.)
- Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Villa María (UNVM), Villa María 1555, Argentina;
- Laboratorio de Control Biotecnológico de Plagas, Instituto BIOTECMED, Departamento de Genética, Universitat de València, 46100 València, Spain
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Barbosa Rodrigues JD, Moreira RO, de Souza JAM, Desidério JA. Interaction of insecticidal proteins from Pseudomonas spp. and Bacillus thuringiensis for boll weevil management. PLoS One 2023; 18:e0294654. [PMID: 38033128 PMCID: PMC10688866 DOI: 10.1371/journal.pone.0294654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 11/06/2023] [Indexed: 12/02/2023] Open
Abstract
Cotton crop yields are largely affected by infestations of Anthonomus grandis, which is its main pest. Although Bacillus thuringiensis (Bt) derived proteins can limit insect pest infestations, the diverse use of control methods becomes a viable alternative in order to prolong the use of technology in the field. One of the alternative methods to Bt technology has been the utilization of certain Pseudomonas species highly efficient in controlling coleopteran insects have been used to produce highly toxic insecticidal proteins. This study aimed to evaluate the toxicity of IPD072Aa and PIP-47Aa proteins, isolated from Pseudomonas spp., in interaction with Cry1Ia10, Cry3Aa, and Cry8B proteins isolated from B. thuringiensis, to control A. grandis in cotton crops. The genes IPD072Aa and PIP-47Aa were synthesized and cloned into a pET-SUMO expression vector. Moreover, Cry1Ia10, Cry3Aa, and Cry8B proteins were obtained by inducing recombinant E. coli clones, which were previously acquired by our research group from the Laboratory of Bacteria Genetics and Applied Biotechnology (LGBBA). These proteins were visualized in SDS-PAGE, quantified, and incorporated into an artificial diet to estimate their lethal concentrations (LC) through individual or combined bioassays. The results of individual toxicity revealed that IPD072Aa, PIP-47Aa, Cry1Ia10, Cry3Aa, and Cry8B were efficient in controlling A. grandis, with the latter being the most toxic. Regarding interaction assays, a high synergistic interaction was observed between Cry1Ia10 and Cry3Aa. All interactions involving Cry3Aa and PIP-47Aa, when combined with other proteins, showed a clear synergistic effect. Our findings highlighted that the tested proteins in combination, for the most part, increase toxicity against A. grandis neonate larvae, suggesting possible constructions for pyramiding cotton plants to the manage and the control boll weevils.
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Affiliation(s)
- Jardel Diego Barbosa Rodrigues
- Biology Department, Faculty of Agrarian and Veterinary Sciences (Jaboticabal Campus), São Paulo State University (UNESP), São Paulo, Brazil
| | - Raquel Oliveira Moreira
- Biology Department, Faculty of Agrarian and Veterinary Sciences (Jaboticabal Campus), São Paulo State University (UNESP), São Paulo, Brazil
| | - Jackson Antônio Marcondes de Souza
- Biology Department, Faculty of Agrarian and Veterinary Sciences (Jaboticabal Campus), São Paulo State University (UNESP), São Paulo, Brazil
| | - Janete Apparecida Desidério
- Biology Department, Faculty of Agrarian and Veterinary Sciences (Jaboticabal Campus), São Paulo State University (UNESP), São Paulo, Brazil
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Liu L, Wang F, Yang W, Yang H, Huang Q, Yang C, Hui W. Molecular and Functional Characterization of Pheromone Binding Protein 2 from Cyrtotrachelus buqueti (Coleoptera: Curculionidae). Int J Mol Sci 2023; 24:16925. [PMID: 38069247 PMCID: PMC10706763 DOI: 10.3390/ijms242316925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 11/26/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
Pheromone-binding proteins (PBPs) play important roles in binding and transporting sex pheromones. However, the PBP genes identified in coleopteran insects and their information sensing mechanism are largely unknown. Cyrtotrachelus buqueti (Coleoptera: Curculionidae) is a major insect pest of bamboo plantations. In this study, a novel PBP gene, CbuqPBP2, from C. buqueti was functionally characterized. CbuqPBP2 was more abundantly expressed in the antennae of both sexes than other body parts, and its expression level was significantly male-biased. Fluorescence competitive binding assays showed that CbuqPBP2 exhibited the strongest binding affinity to dibutyl phthalate (Ki = 6.32 μM), followed by styrene (Ki = 11.37 μM), among twelve C. buqueti volatiles. CbuqPBP2, on the other hand, showed high binding affinity to linalool (Ki = 10.55), the main volatile of host plant Neosinocalamus affinis. Furthermore, molecular docking also demonstrated the strong binding ability of CbuqPBP2 to dibutyl phthalate, styrene, and linalool, with binding energy values of -5.7, -6.6, and -6.0 kcal/mol, respectively, and hydrophobic interactions were the prevailing forces. The knockdown of CbuqPBP2 expression via RNA interference significantly reduced the electroantennography (EAG) responses of male adults to dibutyl phthalate and styrene. In conclusion, these results will be conducive to understanding the olfactory mechanisms of C. buqueti and promoting the development of novel strategies for controlling this insect pest.
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Affiliation(s)
| | | | | | - Hua Yang
- National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation and Ecological Safety on the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China; (L.L.); (F.W.); (W.Y.); (Q.H.); (C.Y.); (W.H.)
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Wang S, Guo Y, Sun Y, Weng M, Liao Q, Qiu R, Zou S, Wu S. Identification of two Bacillus thuringiensis Cry3Aa toxin-binding aminopeptidase N from Rhynchophorus ferrugineus (Coleoptera: Curculionidae). Bull Entomol Res 2023; 113:615-625. [PMID: 37466033 DOI: 10.1017/s0007485323000299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Rhynchophorus ferrugineus is a quarantine pest that mainly damages plants in tropical regions, which are essential economic resources. Cry3Aa has been used to control coleopteran pests and is known to be toxic to R. ferrugineus. The binding of the Cry toxin to specific receptors on the target insect plays a crucial role in the toxicological mechanism of Cry toxins. However, in the case of R. ferrugineus, the nature and identity of the receptor proteins involved remain unknown. In the present study, pull-down assays and mass spectrometry were used to identify two proteins of aminopeptidase N proteins (RfAPN2a and RfAPN2b) in the larval midguts of R. ferrugineus. Cry3Aa was able to bind to RfAPN2a (Kd = 108.5 nM) and RfAPN2b (Kd = 68.2 nM), as well as midgut brush border membrane vesicles (Kd = 482.5 nM). In silico analysis of both RfAPN proteins included the signal peptide and anchored sites for glycosyl phosphatidyl inositol. In addition, RfAPN2a and RfAPN2b were expressed in the human embryonic kidney 293T cell line, and cytotoxicity assays showed that the transgenic cells were not susceptible to activated Cry3Aa. Our results show that RfAPN2a and RfAPN2b are Cry3Aa-binding proteins involved in the Cry3Aa toxicity of R. ferrugineus. This study deepens our understanding of the action mechanism of Cry3Aa in R. ferrugineus larvae.
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Affiliation(s)
- Shaozhen Wang
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350000, China
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yajie Guo
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350000, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Province University, Fujian Agriculture and Forestry University, Fuzhou 350000, China
- Asian Research Center for Bioresource and Environmental Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 188-0002, Japan
| | - Yunzhu Sun
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350000, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Province University, Fujian Agriculture and Forestry University, Fuzhou 350000, China
| | - Mingqing Weng
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350000, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Province University, Fujian Agriculture and Forestry University, Fuzhou 350000, China
| | - Qiliao Liao
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350000, China
| | - Ru Qiu
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350000, China
| | - Shuangquan Zou
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350000, China
| | - Songqing Wu
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350000, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Province University, Fujian Agriculture and Forestry University, Fuzhou 350000, China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, China, 350002
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Hong B, Zhai Y, Yang Y, Chang Q, Li G, Zhang F. Identification and sex-specific expression of chemosensory genes in the antennal transcriptomes of Pachyrhinus yasumatsui (Coleoptera: Curculionidae). J Insect Sci 2023; 23:7135657. [PMID: 37083941 PMCID: PMC10120841 DOI: 10.1093/jisesa/iead023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/16/2023] [Accepted: 04/06/2023] [Indexed: 05/03/2023]
Abstract
Pachyrhinus yasumatsui Kono et Morimoto is a major pest of Chinese jujube, which is widespread in northern China and causes severe economic losses in the jujube industry. Chemosensory genes play crucial roles in insect behaviors. Currently, little is known about chemosensory genes in P. yasumatsui. In the present study, antennal transcriptomes of female and male adult P. yasumatsui were annotated. In total, 113 genes involved in chemosensory functions were identified, including 41 odorant receptors, 28 odorant-binding proteins, 16 ionotropic receptors, 15 chemosensory proteins, 9 gustatory receptors, and 4 sensory neuron membrane proteins. Subsequently, the phylogenetic analyses of these olfactory-related proteins in P. yasumatsui were conducted using multiple sequence alignment. Furthermore, sex-specific expression levels of 113 genes were analyzed based on fragments per kilobase of transcript per million mapped reads (FPKM). Then, the quantitative real-time PCR (RT-qPCR) was used to quantify gene expression profiles of 28 P. yasumatsui OBPs (PyasOBPs) and 15 CSPs (PyasCSPs). The results revealed that 20 PyasOBPs and 13 PyasCSPs exhibited significantly higher expression in the antennae than in the bodies, suggesting that they might have functions in olfaction. Moreover, some OBPs and CSPs (PyasOBP6, PyasOBP7, PyasOBP16, PyasOBP21, and PyasCSP4) exhibited female-biased expression, indicating that they might take part in several female-specific behaviors. This study will promote the understanding of olfactory mechanism in P. yasumatsui, and our findings lay the groundwork for developing environmentally friendly pest management measures.
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Affiliation(s)
- Bo Hong
- Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi’an 710043, China
| | - Yingyan Zhai
- Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi’an 710043, China
| | - Yiwei Yang
- Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi’an 710043, China
| | - Qing Chang
- Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi’an 710043, China
| | - Guangwei Li
- Shaanxi Province Key Laboratory of Jujube, College of Life Science, Yan’an University, Yan’an 716000, China
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Castañeda-Ramírez GS, López-Guillén G, Aguilar-Marcelino L, Siu-Rivas A, Cruz-López L. Insecticidal effect of metabolites identified in edible mushrooms against Rhyssomatus nigerrimus Fahraeus. BRAZ J BIOL 2022; 84:e264786. [PMID: 36287529 DOI: 10.1590/1519-6984.264786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023] Open
Abstract
Excessive use of insecticides has led to resistance of some pathogenic organisms (nematodes, bacteria and fungi), environmental contamination, and the presence of hazardous residues. Therefore, the aim of the present study was to evaluate synthetic metabolites derived from previous studies with edible mushrooms against the soybean weevil Rhyssomatus nigerrimus Fahraeus (Curculonidae) because of the relevance of pest control in an economically important crop. Furthermore, this is one of the first studies where edible fungal molecules are evaluated for the control of these insects. Initially, two in vitro tests (toxic effect and immersion) were evaluated against R. nigerrimus. In these tests, sensitivity and viability were determined in the 2% Tween control in water. For these two tests, the synthetic metabolites pentadecanoic acid (PNA), palmitic acid (PMA), stearic acid (STA), linoleic acid (LNA), β-sitosterol (βT) were evaluated individually as well as in combinations, "the fraction of standards (E1)". Based on the results obtained, the dip test was selected to evaluate the mixtures of two standards (1. PMA + βT, 2. PMA + PNA, 3. PMA + LNA, 4. PMA + STA, 5. STA + βT, 6. STA + PNA, 7. STA + LNA, 8. PNA + βT, 9. PNA + LNA, 10. LNA + βT), three (1. PNA + βT + LNA, 2. PNA + βT + STA, 3. STA + LNA + PNA and 4. STA + LNA + βT) and four (PNA, βT, LNA and STA). The results showed that the mixture of three standards caused a higher percentage of mortality relative to the control group: l. PNA + βT + LNA and 2. PNA + βT + STA with 54.44 and 48% mortality of R. nigerrimus insects exposed for 15 days. These results show the importance of evaluating mixtures of molecules against R. nigerrimus.
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Affiliation(s)
- G S Castañeda-Ramírez
- Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias - INIFAP, Campo Experimental Rosario Izapa, Tuxtla Chico, Chiapas, México
| | - G López-Guillén
- Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias - INIFAP, Campo Experimental Rosario Izapa, Tuxtla Chico, Chiapas, México
| | - L Aguilar-Marcelino
- Centro Nacional de Investigación Disciplinaria en Salud Animal e Inocuidad, INIFAP, Jiutepec, Morelos, México
| | - A Siu-Rivas
- Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias - INIFAP, Campo Experimental Rosario Izapa, Tuxtla Chico, Chiapas, México
| | - L Cruz-López
- El Colegio de la Frontera Sur, Tapachula, Chiapas, México
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9
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Oliveira OA, Ferreira SR, Ribeiro EDS, Ferreira ATS, Perales J, Fernandes KVS, Oliveira AEA. Deleterious effects of Schinus terebinthifolius Raddi seed flour on cowpea weevil, Callosobruchus maculatus (F.), larval development. Pestic Biochem Physiol 2022; 183:105082. [PMID: 35430072 DOI: 10.1016/j.pestbp.2022.105082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 11/19/2021] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
Schinus terebinthifolius, Raddi, has been extensively studied due to its anti-inflammatory and antibiotic properties. S. terebinthifolius was also toxic to some insects, however little has been explored about the nature of its insecticide compounds or the toxicity of this plant to insect species. In this work, we investigate the toxicity of S. terebinthifolius seed flour against the insect C. maculatus. S. terebinthifolius seed flour interfered with the post hatch development of the C. maculatus larvae, decreasing larval survival, mass and length. Using DEAE-cellulose chromatography, five protein fractions were isolated, a non-retained fraction (NRF) and four retained fractions, eluted with 0.25, 0.5, 0.7 and 1.0 M NaCl. Proteins with varying molecular masses were observed in all fractions. The majority protein bands were identified by mass spectrometry analysis and among the main identified proteins are 11S globulins (such glycinin), lipoxygenase, chitinases, 7S globulins (vicilins, canavalin and β conglycinin), annexin, catalase and sucrose binding protein. All DEAE-protein fractions were toxic to the insect, interfering with the post hatch larval development and survival. Decreases greater than 90% were observed in the larval mass and length at 20 days after oviposition (DAO) for larvae raised on diet containing 0.5% of some fractions. Alterations in the level of proteins, glucose and in the activity of the enzymes lipases and cysteine proteases were also detected in these larvae. Our results show that seeds of S. terebinthifolius have an arsenal of toxic proteins with potential for the control of the insect C. maculatus.
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Affiliation(s)
- Odara Araújo Oliveira
- Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, RJ, Brazil
| | - Sarah Rodrigues Ferreira
- Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, RJ, Brazil
| | | | - Andre T S Ferreira
- Laboratório de Toxinologia, Fundação Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Jonas Perales
- Laboratório de Toxinologia, Fundação Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Kátia V S Fernandes
- Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, RJ, Brazil
| | - Antonia E A Oliveira
- Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, RJ, Brazil.
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10
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Wang L, Xu D, Huang Y, Zhou H, Liu W, Cong S, Wang J, Li W, Wan P. Mutation in the Cadherin Gene Is a Key Factor for Pink Bollworm Resistance to Bt Cotton in China. Toxins (Basel) 2022; 14:toxins14010023. [PMID: 35051000 PMCID: PMC8777804 DOI: 10.3390/toxins14010023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/20/2021] [Accepted: 12/23/2021] [Indexed: 02/04/2023] Open
Abstract
Transgenic crops producing Bacillus thuringiensis (Bt) toxins are widely planted for insect control, but their efficacy may decrease as insects evolve resistance. Understanding the genetic basis of insect resistance is essential for developing an integrated strategy of resistance management. To understand the genetic basis of resistance in pink bollworm (Pectinophora gossypiella) to Bt cotton in the Yangtze River Valley of China, we conducted an F2 screening for alleles associated with resistance to the Bt (Cry1Ac) protein for the first time. A total of 145 valid single-paired lines were screened, among which seven lines were found to carry resistance alleles. All field parents in those seven lines carried recessive resistance alleles at the cadherin locus, including three known alleles, r1, r13 and r15, and two novel alleles, r19 and r20. The overall frequency of resistance alleles in 145 lines was 0.0241 (95% CI: 0.0106-0.0512). These results demonstrated that resistance was rare and that recessive mutation in the cadherin gene was the primary mechanism of pink bollworm resistance to Bt cotton in the Yangtze River Valley of China, which will provide a scientific basis for implementing targeted resistance management statics of pink bollworm in this region.
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Affiliation(s)
- Ling Wang
- Key Laboratory of Integrated Pest Management on Crops in Central China, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Crop Disease, Insect Pests and Weeds Control, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (L.W.); (D.X.); (S.C.); (J.W.); (W.L.)
| | - Dong Xu
- Key Laboratory of Integrated Pest Management on Crops in Central China, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Crop Disease, Insect Pests and Weeds Control, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (L.W.); (D.X.); (S.C.); (J.W.); (W.L.)
| | - Yunxin Huang
- School of Resource and Environmental Sciences, Hubei University, Wuhan 430062, China;
| | - Huazhong Zhou
- General Station of Plant Protection, Hubei Province, Wuhan 430070, China; (H.Z.); (W.L.)
| | - Weiguo Liu
- General Station of Plant Protection, Hubei Province, Wuhan 430070, China; (H.Z.); (W.L.)
| | - Shengbo Cong
- Key Laboratory of Integrated Pest Management on Crops in Central China, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Crop Disease, Insect Pests and Weeds Control, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (L.W.); (D.X.); (S.C.); (J.W.); (W.L.)
| | - Jintao Wang
- Key Laboratory of Integrated Pest Management on Crops in Central China, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Crop Disease, Insect Pests and Weeds Control, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (L.W.); (D.X.); (S.C.); (J.W.); (W.L.)
| | - Wenjing Li
- Key Laboratory of Integrated Pest Management on Crops in Central China, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Crop Disease, Insect Pests and Weeds Control, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (L.W.); (D.X.); (S.C.); (J.W.); (W.L.)
| | - Peng Wan
- Key Laboratory of Integrated Pest Management on Crops in Central China, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Crop Disease, Insect Pests and Weeds Control, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (L.W.); (D.X.); (S.C.); (J.W.); (W.L.)
- Correspondence:
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11
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Al Dawsari MM, Alam P. Disruption impact of citronella and menthol insecticides on adults behavior and hemocytes morphology in the red palm weevil Rhynchophorus ferrugineus "Oliver" (Coleoptera: Curculionidae). Sci Prog 2022; 105:368504221079437. [PMID: 35188836 PMCID: PMC10358468 DOI: 10.1177/00368504221079437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
This study was conducted to evaluate some terpenes effect on the behavior and immune function of hemocytes in adults of the red palm weevil Rhynchophorus ferrugineus. Six individual different terpenes these are: (±)-menthol, B-citronellol, ( + )-3-carene, (R)- ( + )- limonene, citronella oil and orange terpenes. The results revealed significant differences between the terpenes used on the olfactory response on this insect, in that half of the compounds were very attractive while the other half were repellant to them. This behavior study results with olfactometer citronella oil exhibited an 80% attraction response rate for both sexes, while menthol exhibited a 60% attraction response rate for females and 100% for males. By contrast, menthol had a more significant effect on adults than citronella, lethal concentration at 50 scale (LC50) values of 1.03, 0.89, and 0.9 mg, and LC95 values of 5.09, 2.01, and 1.59 mg, after 24, 48 and 72 h, respectively. For citronella oil, the LC50 values were 2.09, 1.76, and 1.70 mg after 24, 48, and 72 h, and the LC95 values were 5.5, 3.7, and 1.5 mg after 24, 48 and 72h, were noted. In the present study, the effects of citronella and methanol insecticides were observed on six types of hemocytes namely prohemocytes, granulocytes, plasmatocytes, oenocytes, coagulocytes and spherulocytes. Both citronella oil and menthol had a histopathological effect on the hemocytes of the adult red palm weevil, specifically, on the cell membrane, cytoplasm, and nucleus. The findings also revealed that the vacuoles in some hemocytes, specifically, the prohemocytes, plasmatocytes, and granulocytes were more sensitive than those in other hemocytes, which remained unaffected by the treatment.The effects of citronella and menthol on RPW immunity were demonstrated in this study, and this information may be applied to their usage in integrated pest control at sub-lethal dosages.
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Affiliation(s)
- Mona Mohammed Al Dawsari
- Department of Biology, College of Science and Humanities in AL-Kharj, Prince Sattam bin Abdulaziz University, Kingdom of Saudi Arabia, 11942
| | - Pravej Alam
- Department of Biology, College of Science and Humanities in AL-Kharj, Prince Sattam bin Abdulaziz University, Kingdom of Saudi Arabia, 11942
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12
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Ramakrishnan R, Hradecký J, Roy A, Kalinová B, Mendezes RC, Synek J, Bláha J, Svatoš A, Jirošová A. Metabolomics and transcriptomics of pheromone biosynthesis in an aggressive forest pest Ips typographus. Insect Biochem Mol Biol 2022; 140:103680. [PMID: 34808354 DOI: 10.1016/j.ibmb.2021.103680] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/08/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
Eurasian spruce bark beetle, Ips typographus, is a destructive pest in spruce forests. The ability of I. typographus to colonise host trees depends on its massive aggregation behaviour mediated by aggregation pheromones, consisting of 2-methyl-3-buten-2-ol and cis-verbenol. Other biologically active compounds such as ipsdienol and verbenone have also been detected in the beetle. Biosynthesis of 2-methyl-3-buten-2-ol and ipsdienol de novo from mevalonate and that of cis-verbenol from α-pinene sequestrated from the host have been reported in preliminary studies. However, knowledge on the molecular mechanisms underlying pheromone biosynthesis in this pest is currently limited. In this study, we performed metabolomic and differential gene expression (DGE) analysis for the pheromone-producing life stages of I. typographus. The highest amounts of 2-methyl-3-buten-2-ol (238 ng/gut) and cis-verbenol (23 ng/gut) were found in the fed male gut (colonisation stage) and the immature male gut (early stage), respectively. We also determined the amount of verbenyl oleate (the possible storage form of cis-verbenol), a monoterpenyl fatty acid ester, to be approximately 1604 ng/mg in the immature stage in the beetle body. DGE analysis revealed possible candidate genes involved in the biosynthesis of the quantified pheromones and related compounds. A novel hemiterpene-synthesising candidate isoprenyl-di-phosphate synthase Ityp09271 gene proposed for 2-methyl-3-buten-2-ol synthesis was found to be highly expressed only in the fed male beetle gut. Putative cytochrome P450 genes involved in cis/trans-verbenol synthesis and an esterase gene Ityp11977, which could regulate verbenyl oleate synthesis, were identified in the immature male gut. Our findings from the molecular analysis of pheromone-producing gene families are the first such results reported for I. typographus. With further characterisation of the identified genes, we can develop novel strategies to disrupt the aggregation behaviour of I. typographus and thereby prevent vegetation loss.
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Affiliation(s)
- Rajarajan Ramakrishnan
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Czech Republic
| | - Jaromír Hradecký
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Czech Republic
| | - Amit Roy
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Czech Republic
| | - Blanka Kalinová
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Czech Republic
| | - Rya C Mendezes
- Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Jiri Synek
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Czech Republic
| | - Jaromír Bláha
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Czech Republic
| | - Aleš Svatoš
- Max Planck Institute for Chemical Ecology, Jena, Germany; Institute of Organic Chemistry and Biochemistry, the Czech Academy of Sciences, Prague, Czech Republic
| | - Anna Jirošová
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Czech Republic.
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13
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Sun Y, Fu D, Kang X, Liu B, Ning H, Chen H. Function of mevalonate pathway genes in the synthesis of frontalin in Chinese white pine beetle, Dendroctonus armandi (curculionidae: Scolytinae). Arch Insect Biochem Physiol 2021; 107:e21828. [PMID: 34173689 DOI: 10.1002/arch.21828] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 05/31/2021] [Accepted: 06/10/2021] [Indexed: 06/13/2023]
Abstract
The Chinese white pine beetle (Dendroctonus armandi Tsai and Li) is a significant pest of pine forests in the Qinling and Bashan Mountains of China. Adult males commonly produce frontalin using precursors synthesized through the mevalonate pathway, which is regulated by juvenile hormone III (JHIII). In this study, the expression levels of mevalonate pathway genes were quantified after phloem feeding and topical application of the JHIII solution. The frontalin was quantified by gas chromatography-mass spectrometry. Both the phloem feeding and JHIII treatments produced an evident upregulation in the male gut, mainly in 3-hydroxy-3-methylglutaryl-CoA synthase (HMGS) and 3-hydroxy-3-methylglutaryl-CoA reductase (HMGR). Moreover, HMGS, HMGR, isopentenyl diphosphate isomerase, and geranyl diphosphate synthase/farnesyl diphosphate synthase were upregulated in fed and JHIII-stimulated males of D. armandi under both conditions (solitary and paired). The expression levels were higher in paired compared to solitary males. Males had higher expression levels compared with females. Correspondingly, the phloem-feeding males produced more frontalin than JHIII-treated males, and the production of frontalin was higher in paired males than in solitary males. The knockdown of mevalonate pathway genes using RNAi in vivo effectively reduced the messenger RNA level of these genes and inhibited the production of frontalin. Among them, the silencing of HMGR or HMGS genes reduced the synthesis of frontalin most significantly.
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Affiliation(s)
- Yaya Sun
- College of Forestry, Northwest A and F University, Yangling, Shaanxi, China
| | - Danyang Fu
- College of Forestry, Northwest A and F University, Yangling, Shaanxi, China
| | - Xiaotong Kang
- College of Forestry, Northwest A and F University, Yangling, Shaanxi, China
| | - Bin Liu
- College of Forestry, Northwest A and F University, Yangling, Shaanxi, China
| | - Hang Ning
- College of Forestry, Northwest A and F University, Yangling, Shaanxi, China
| | - Hui Chen
- College of Forestry, Northwest A and F University, Yangling, Shaanxi, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, Guangdong, China
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14
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Mackay-Smith A, Dornon MK, Lucier R, Okimoto A, Mendonca de Sousa F, Rodriguero M, Confalonieri V, Lanteri AA, Sequeira AS. Host-specific gene expression as a tool for introduction success in Naupactus parthenogenetic weevils. PLoS One 2021; 16:e0248202. [PMID: 34329290 PMCID: PMC8323892 DOI: 10.1371/journal.pone.0248202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 07/13/2021] [Indexed: 11/22/2022] Open
Abstract
Food resource access can mediate establishment success in invasive species, and generalist herbivorous insects are thought to rely on mechanisms of transcriptional plasticity to respond to dietary variation. While asexually reproducing invasives typically have low genetic variation, the twofold reproductive capacity of asexual organisms is a marked advantage for colonization. We studied host-related transcriptional acclimation in parthenogenetic, invasive, and polyphagous weevils: Naupactus cervinus and N. leucoloma. We analyzed patterns of gene expression in three gene categories that can mediate weevil-host plant interactions through identification of suitable host plants, short-term acclimation to host plant defenses, and long-term adaptation to host plant defenses and their pathogens. This approach employed comparative transcriptomic methods to investigate differentially expressed host detection, detoxification, immune defense genes, and pathway-level gene set enrichment. Our results show that weevil gene expression responses can be host plant-specific, and that elements of that response can be maintained in the offspring. Some host plant groups, such as legumes, appear to be more taxing as they elicit a complex gene expression response which is both strong in intensity and specific in identity. However, the weevil response to taxing host plants shares many differentially expressed genes with other stressful situations, such as host plant cultivation conditions and transition to novel host, suggesting that there is an evolutionarily favorable shared gene expression regime for responding to different types of stressful situations. Modulating gene expression in the absence of other avenues for phenotypic adaptation may be an important mechanism of successful colonization for these introduced insects.
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Affiliation(s)
- Ava Mackay-Smith
- Department of Biological Sciences, Wellesley College, Wellesley, Massachusetts, United States of America
| | - Mary Kate Dornon
- Department of Biological Sciences, Wellesley College, Wellesley, Massachusetts, United States of America
| | - Rosalind Lucier
- Department of Biological Sciences, Wellesley College, Wellesley, Massachusetts, United States of America
| | - Anna Okimoto
- Department of Biological Sciences, Wellesley College, Wellesley, Massachusetts, United States of America
| | - Flavia Mendonca de Sousa
- Department of Biological Sciences, Wellesley College, Wellesley, Massachusetts, United States of America
| | - Marcela Rodriguero
- Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Viviana Confalonieri
- Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Analia A. Lanteri
- Facultad de Ciencias Naturales y Museo, Universidad de La Plata, La Plata, Argentina
| | - Andrea S. Sequeira
- Department of Biological Sciences, Wellesley College, Wellesley, Massachusetts, United States of America
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Ferreira SR, de Moura Rocha M, Damasceno-Silva KJ, Ferreira ATS, Perales J, Fernandes KVS, Oliveira AEA. The resistance of the cowpea cv. BRS Xiquexique to infestation by cowpea weevil is related to the presence of toxic chitin-binding proteins. Pestic Biochem Physiol 2021; 173:104782. [PMID: 33771261 DOI: 10.1016/j.pestbp.2021.104782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 12/29/2020] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
The cowpea weevil (Callosobruchus maculatus) is the main pest that attacks cowpea (Vigna unguiculata) seeds during storage, causing nutritional and economic losses in the cowpea crop. Thus, studies aiming to identify resistant cowpea cultivars have been developed. Chitin-binding proteins (CBP), such vicilins and chitinases, have been detected in seeds and related with the toxicity to insects. In this work, we investigated the presence of chitin-binding proteins in the partially resistant cowpea cv. BRS Xiquexique and evaluated their toxicity towards cowpea weevil. The CBP fraction was isolated by chitin affinity chromatography. CBP fraction showed, through 15% SDS PAGE, protein bands with varying molecular masses, mainly below 55 kDa. Proteins present in CBP fraction were identified by Western blotting and mass spectrometry analysis, as vicilins and chitinases. CBP fraction, at 5%, was able to interfere with the development of cowpea weevil, decreasing larval mass and length. A CBV (chitin-binding vicilin) fraction isolated from CBP fraction was toxic, at 2.0%, to C. maculatus, decreasing larval mass and length in 64.3% and 33.23%, respectively. These results suggest that chitin binding proteins, such vicilins and chitinases, may be related to the resistance of cowpea cv. BRS Xiquexique to the infestation by C. maculatus.
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Affiliation(s)
- Sarah Rodrigues Ferreira
- Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, RJ 28013-602, Brazil
| | - Maurisrael de Moura Rocha
- Embrapa Meio-Norte, Avenida Duque de Caxias, 5650, Bairro Buenos Aires, Teresina, PI 64008-780, Brazil
| | | | - Andre T S Ferreira
- Laboratório de Toxinologia, Fundação Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Jonas Perales
- Laboratório de Toxinologia, Fundação Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Kátia V S Fernandes
- Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, RJ 28013-602, Brazil
| | - Antonia E A Oliveira
- Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, RJ 28013-602, Brazil.
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16
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Zhang M, Zhang D, Ren J, Pu S, Wu H, Ma Z. Target verification of allyl isothiocyanate on the core subunits of cytochrome c oxidase in Sitophilus zeamais by RNAi. Pest Manag Sci 2021; 77:1292-1302. [PMID: 33063911 DOI: 10.1002/ps.6142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 10/06/2020] [Accepted: 10/16/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Allyl isothiocyanate (AITC) is a volatile organic compound with a potent insecticidal activity to the stored-grain pest Sitophilus zeamais Motschulsky, which severely damages grain storage and container transport worldwide. Our previous study showed that mitochondrial complex IV was the primary target of AITC in adult Sitophilus zeamais. To further verify the targets of AITC, we employed RNA interference (RNAi) by using double-stranded RNA (dsRNA) to knockdown three core subunits of cytochrome c oxidase (COX)-I, -II and -III in 18-day-old larvae prior to their exposure to AITC to detect susceptibility changes. RESULTS The susceptibility of dsRNACOX-I and -II injection treatments to AITC significantly increased at 72 h while the mortality reached up to 85.56% and 67.78%, respectively, and dsRNACOX-I and dsRNACOX-II injection showed the same subcellular structural characteristics showing vacuolization and vague mitochondrial cristae and decrease of COX activity during AITC fumigation treatment, suggesting the potential of COX-I and COX-II as the targets of AITC. High mortality reached up to 75.55%, 71.88% and 82.22%, respectively, and the phenotype of larvae turning from milky white to dark brown in the thorax and death eventually was confirmed after dsRNACOX-I, -II and -III injection. CONCLUSION COX-I and -II were elucidated as the potential targets of AITC and dsRNACOX-I, -II and -III have the potential to be developed into nucleic acid pesticides for their robust lethal effects and are worth pursuing for improving AITC fumigation activity in Sitophilus zeamais control. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Min Zhang
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Dan Zhang
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Jingjing Ren
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Shi Pu
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Hua Wu
- College of Plant Protection, Northwest A&F University, Yangling, China
- Shaanxi Research Center of Biopesticide Engineering and Technology, Northwest A&F University, Yangling, China
| | - Zhiqing Ma
- College of Plant Protection, Northwest A&F University, Yangling, China
- Shaanxi Research Center of Biopesticide Engineering and Technology, Northwest A&F University, Yangling, China
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17
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Blomquist GJ, Tittiger C, MacLean M, Keeling CI. Cytochromes P450: terpene detoxification and pheromone production in bark beetles. Curr Opin Insect Sci 2021; 43:97-102. [PMID: 33359166 DOI: 10.1016/j.cois.2020.11.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 11/11/2020] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
Bark beetles (family: Curculionidae; subfamily: Scolytinae) in the Dendroctonus and Ips genera are the most destructive forest pests in the Northern hemisphere. They use cytochromes P450 (P450s) to detoxify tree-produced terpenes to produce pheromones, in de novo pheromone production and to oxidize odorants on antennae. Many Dendroctonus spp. use trans-verbenol as an aggregation pheromone, and it is formed from host-tree produced α-pinene hydroxylated by CYP6DE1 during larval stages, stored as verbenyl ester of fatty acids, and then released when the female begins feeding on a new host tree. Ips spp. hydroxylate de novo produced myrcene to form ipsdienol. Subsequent steps form the appropriate enantiomeric composition of ipsdienol and convert ipsdienol to ipsenol. In this article we review recent progress in elucidating the functions of P450s in Ips and Dendroctonus species and in doing so provide insights into the role of these enzymes in host phytochemical detoxification and pheromone production.
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Affiliation(s)
- Gary J Blomquist
- Biochemistry and Molecular Biology, University of Nevada, Reno, NV, United States.
| | - Claus Tittiger
- Biochemistry and Molecular Biology, University of Nevada, Reno, NV, United States
| | - Marina MacLean
- Biochemistry and Molecular Biology, University of Nevada, Reno, NV, United States
| | - Christopher I Keeling
- Laurentian Forestry Centre, Canadian Forest Service, Natural Resources Canada, Québec, QC, Canada; Département de biochimie, de microbiologie et de bio-informatique, Université Laval, Québec, QC, Canada
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18
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Hua J, Pan C, Huang Y, Li Y, Li H, Wu C, Chen T, Ma D, Li Z. Functional characteristic analysis of three odorant-binding proteins from the sweet potato weevil (Cylas formicarius) in the perception of sex pheromones and host plant volatiles. Pest Manag Sci 2021; 77:300-312. [PMID: 32696609 DOI: 10.1002/ps.6019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 07/14/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND The sweet potato weevil, Cylas formicarius, is the most serious pest of sweet potato worldwide. The molecular mechanism of sex pheromone recognition in C. formicarius has not been reported. Odorant-binding proteins (OBPs) play a critical role in selectively binding and transporting pheromones or other odors to the surface of olfactory receptor neurons through the aqueous sensillar lymph, therefore the function of sweet potato OBPs is worth studying. RESULTS Herein, the CforOBP1-3 genes encoding three classical OBPs were cloned in C. formicarius by reverse transcription-polymerase chain reaction. Phylogenetic analysis showed that CforOBP1-3 were homologous genes, but the relationship between CforOBP2 and CforOBP3 was closest among the three genes. In addition, real-time quantitative reverse transcription-polymerase chain reaction (qRT-PCR) assays demonstrated that the expression of CforOBP1 was higher in the antennae and legs of female and male insects, while CforOBP2 and CforOBP3 were mainly expressed in the antennae of male insects. The fluorescent competitive binding assay results indicated that CforOBP1-3 had strong binding affinities to sex pheromones and other tested ligands. Finally, the mRNA expression of CforOBP1-3 was successfully inhibited by RNA interference, and in vivo behavioral experiments showed that CforOBP1-3-deficient C. formicarius was partly anosmic and lost some of its ability to locate sex pheromones and host plant volatiles. CONCLUSION These results suggested that CforOBP1 was shown to be involved in the process of weevils feeding and finding sweet potato, and CforOBP2-3 were mainly involved in the mating behavior of adult male weevils.
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Affiliation(s)
- Jinfeng Hua
- Institute of Integrative Plant Biology, Jiangsu Key Laboratory of Phylogenomics & Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Jiangsu, China
- Sweet Potato Laboratory, Maize Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, China
| | - Chao Pan
- Institute of Integrative Plant Biology, Jiangsu Key Laboratory of Phylogenomics & Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Jiangsu, China
| | - Yongmei Huang
- Sweet Potato Laboratory, Maize Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, China
| | - Yanqing Li
- Sweet Potato Laboratory, Maize Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, China
| | - Huifeng Li
- Sweet Potato Laboratory, Maize Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, China
| | - Cuirong Wu
- Sweet Potato Laboratory, Maize Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, China
| | - Tianyuan Chen
- Sweet Potato Laboratory, Maize Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, China
| | - Daifu Ma
- Xuzhou Academy of Agricultural Sciences/Sweet Potato Research Institute, CAAS, Jiangsu, China
| | - Zongyun Li
- Institute of Integrative Plant Biology, Jiangsu Key Laboratory of Phylogenomics & Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Jiangsu, China
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19
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Thompson KM, Huber DPW, Murray BW. Autumn shifts in cold tolerance metabolites in overwintering adult mountain pine beetles. PLoS One 2020; 15:e0227203. [PMID: 31914144 PMCID: PMC6948739 DOI: 10.1371/journal.pone.0227203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 12/13/2019] [Indexed: 12/03/2022] Open
Abstract
The mountain pine beetle, Dendroctonus ponderosae (Coleoptera: Curculionidae) is a major forest pest of pines in western North America. Beetles typically undergo a one-year life cycle with larval cold hardening in preparation for overwintering. Two-year life cycle beetles have been observed but not closely studied. This study tracks cold-hardening and preparation for overwintering by adult mountain pine beetles in their natal galleries. Adults were collected in situ between September and December 2016 for a total of nine time points during 91 days. Concentrations of 41 metabolites in these pooled samples were assessed using quantitative nuclear magnetic resonance (NMR). Levels of glycerol and proline increased significantly with lowering temperature during the autumn. Newly eclosed mountain pine beetles appear to prepare for winter by generating the same cold-tolerance compounds found in other insect larvae including mountain pine beetle, but high on-site mortality suggested that two-year life cycle adults have a less efficacious acclimation process. This is the first documentation of cold acclimation metabolite production in overwintering new adult beetles and is evidence of physiological plasticity that would allow evolution by natural selection of alternate life cycles (shortened or lengthened) under a changing climate or during expansion into new geoclimatic areas.
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Affiliation(s)
- Kirsten M. Thompson
- Natural Resources and Environmental Studies, University of Northern British Columbia, Prince George, British Columbia, Canada
- * E-mail:
| | - Dezene P. W. Huber
- Natural Resources and Environmental Studies, University of Northern British Columbia, Prince George, British Columbia, Canada
| | - Brent W. Murray
- Natural Resources and Environmental Studies, University of Northern British Columbia, Prince George, British Columbia, Canada
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20
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Hussain A, AlJabr AM, Al-Ayedh H. Development-Disrupting Chitin Synthesis Inhibitor, Novaluron, Reprogramming the Chitin Degradation Mechanism of Red Palm Weevils. Molecules 2019; 24:molecules24234304. [PMID: 31779078 PMCID: PMC6930496 DOI: 10.3390/molecules24234304] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 01/13/2023] Open
Abstract
Disruption in chitin regulation by using chitin synthesis inhibitor (novaluron) was investigated to gain insights into the biological activity of chitinase in red palm weevils, an invasive pest of date palms in the Middle East. Impact of novaluron against ninth instar red palm weevil larvae was examined by dose-mortality response bioassays, nutritional indices, and expression patterns of chitinase genes characterized in this study. Laboratory bioassays revealed dose-dependent mortality response of ninth-instar red palm weevil larvae with LD50 of 14.77 ppm of novaluron. Dietary growth analysis performed using different doses of novaluron (30, 25, 20, 15, 10, and 5 ppm) exhibited very high reduction in their indexes such as Efficacy of Conversion of Digested Food (82.38%) and Efficacy of Conversion of Ingested Food (74.27%), compared with control treatment. Transcriptomic analysis of red palm weevil larvae characterized numerous genes involved in chitin degradation including chitinase, chitinase-3-like protein 2, chitinase domain-containing protein 1, Endochitinase-like, chitinase 3, and chitin binding peritrophin-a domain. However, quantitative expression patterns of these genes in response to novaluron-fed larvae revealed tissue-specific time-dependent expression patterns. We recorded overexpression of all genes from mid-gut tissues. Growth retarding, chitin remodeling and larvicidal potential suggest novaluron as a promising alternate for Rhynchophorus ferrugineus management.
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Affiliation(s)
- Abid Hussain
- Laboratory of Bio-Control and Molecular Biology, Department of Arid Land Agriculture, College of Agricultural and Food Sciences, King Faisal University, Hofuf 31982, Al-Ahsa, Saudi Arabia;
- Research and Consulting Institute, King Faisal University, Hofuf 31982, Al-Ahsa, Saudi Arabia
- Ministry of Environment, Water and Agriculture, Riyadh 11442, Saudi Arabia;
| | - Ahmed Mohammed AlJabr
- Laboratory of Bio-Control and Molecular Biology, Department of Arid Land Agriculture, College of Agricultural and Food Sciences, King Faisal University, Hofuf 31982, Al-Ahsa, Saudi Arabia;
- Correspondence: ; Tel.: +009-6650-691-4442
| | - Hassan Al-Ayedh
- Ministry of Environment, Water and Agriculture, Riyadh 11442, Saudi Arabia;
- National Agriculture technology center, Life science & Environment Research Institute, King Abdulaziz City for Science & Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia
- RPW Consultant, United Nations, Food and Agriculture Organization (FAO), Riyadh 11442, Saudi Arabia
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21
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Sarabia LE, López MF, Obregón-Molina G, Cano-Ramírez C, Sánchez-Martínez G, Zúñiga G. The Differential Expression of Mevalonate Pathway Genes in the Gut of the Bark Beetle Dendroctonus rhizophagus (Curculionidae: Scolytinae) Is Unrelated to the de Novo Synthesis of Terpenoid Pheromones. Int J Mol Sci 2019; 20:E4011. [PMID: 31426479 PMCID: PMC6721070 DOI: 10.3390/ijms20164011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/03/2019] [Accepted: 07/03/2019] [Indexed: 12/11/2022] Open
Abstract
Bark beetles commonly produce de novo terpenoid pheromones using precursors synthesized through the mevalonate pathway. This process is regulated by Juvenile Hormone III (JH III). In this work, the expression levels of mevalonate pathway genes were quantified after phloem feeding-to induce the endogenous synthesis of JH III-and after the topical application of a JH III solution. The mevalonate pathway genes from D. rhizophagus were cloned, molecularly characterized, and their expression levels were quantified. Also, the terpenoid compounds produced in the gut were identified and quantified by Gas Chromatography Mass Spectrometry (GC-MS). The feeding treatment produced an evident upregulation, mainly in acetoacetyl-CoA thiolase (AACT), 3-hydroxy-3-methylglutaryl-CoA synthase (HMGS), 3-hydroxy-3-methylglutaryl-CoA reductase (HMGR), phosphomevalonate kinase (PMK), and isopentenyl diphosphate isomerase (IPPI) genes, and males reached higher expression levels compared to females. In contrast, the JH III treatment did not present a clear pattern of upregulation in any sex or time. Notably, the genes responsible for the synthesis of frontalin and ipsdienol precursors (geranyl diphosphate synthase/farnesyl diphosphate synthase (GPPS/FPPS) and geranylgeranyl diphosphate synthase (GGPPS)) were not clearly upregulated, nor were these compounds further identified. Furthermore, trans-verbenol and myrtenol were the most abundant compounds in the gut, which are derived from an α-pinene transformation rather than de novo synthesis. Hence, the expression of mevalonate pathway genes in D. rhizophagus gut is not directed to the production of terpenoid pheromones, regardless of their frequent occurrence in the genus Dendroctonus.
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Affiliation(s)
- Laura Elisa Sarabia
- Laboratorio de Variación Biológica y Evolución, Departamento de Zoología, Escuela, Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Miguel Hidalgo, Mexico City CP 11340, Mexico
| | - María Fernanda López
- Laboratorio de Variación Biológica y Evolución, Departamento de Zoología, Escuela, Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Miguel Hidalgo, Mexico City CP 11340, Mexico
| | - Gabriel Obregón-Molina
- Laboratorio de Variación Biológica y Evolución, Departamento de Zoología, Escuela, Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Miguel Hidalgo, Mexico City CP 11340, Mexico
| | - Claudia Cano-Ramírez
- Laboratorio de Variación Biológica y Evolución, Departamento de Zoología, Escuela, Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Miguel Hidalgo, Mexico City CP 11340, Mexico
| | - Guillermo Sánchez-Martínez
- Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Campo Experimental Pabellón, Km. 32.5 Carr. Ags.-Zac., Pabellón de Arteaga, Ags. CP 20660, Mexico
| | - Gerardo Zúñiga
- Laboratorio de Variación Biológica y Evolución, Departamento de Zoología, Escuela, Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Miguel Hidalgo, Mexico City CP 11340, Mexico.
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22
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Prentice K, Smagghe G, Gheysen G, Christiaens O. Nuclease activity decreases the RNAi response in the sweetpotato weevil Cylas puncticollis. Insect Biochem Mol Biol 2019; 110:80-89. [PMID: 31009678 DOI: 10.1016/j.ibmb.2019.04.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/26/2019] [Accepted: 04/01/2019] [Indexed: 06/09/2023]
Abstract
RNA interference (RNAi) refers to the process of suppression of gene expression in eukaryotes, which has a great potential for the control of pest and diseases. Unfortunately, the efficacy of this technology is limited or at best variable in some insects. In the African sweet potato weevil (SPW) Cylas puncticollis, a devastating pest that affects the sweet potato production in Sub-Saharan Africa (SSA), the RNAi response was highly efficient when dsRNA was delivered by injection, but it showed a reduced response by oral feeding. In the present study, the role of nucleases in the reduced RNAi efficiency in C. puncticollis is investigated. Several putative dsRNases were first identified in the transcriptome of the SPW through homology search and were subsequently further characterized. Two of these dsRNases were specifically expressed in the gut tissue of the insect and we could demonstrate through RNAi experiments that these affected dsRNA stability in the gut. Furthermore, RNAi-of-RNAi studies, using snf7 as a reporter gene, demonstrated that silencing one of these nucleases, Cp-dsRNase-3, clearly increases RNAi efficacy. After silencing this nuclease, significantly higher mortality was observed in dssnf7-treated insects 14 days post-feeding as compared to control treatments, and the gene downregulation was confirmed at the transcript level via qPCR analysis. Taken together, our results demonstrate that the RNAi efficiency is certainly impaired by nuclease activity in the gut environment of the SPW Cylas puncticollis.
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Affiliation(s)
- Katterinne Prentice
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium; Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium
| | - Guy Smagghe
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium
| | - Godelieve Gheysen
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium
| | - Olivier Christiaens
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium.
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23
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Tang QF, Shen C, Zhang Y, Yang ZP, Han RR, Wang J. Antennal transcriptome analysis of the maize weevil Sitophilus zeamais: Identification and tissue expression profiling of candidate odorant-binding protein genes. Arch Insect Biochem Physiol 2019; 101:e21542. [PMID: 30820994 DOI: 10.1002/arch.21542] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 01/14/2019] [Accepted: 02/05/2019] [Indexed: 06/09/2023]
Abstract
Our bioassays reviewed that antennae played crucial roles in the responses of maize weevil (Sitophilus zeamais) to food and sex volatiles. In order to identify the maize weevil odorant-binding protein (OBP) genes, we analyzed its antennal transcriptome. In total, 21,587,928 high-quality clean reads were obtained from RNA-seq, 52,206 unigenes were assembled, and 25,744 unigenes showed significant similarity ( E value < 10 -5 ) to known proteins in the NCBI nonredundant protein database. From those unigenes, we identified 41 candidate OBP proteins, which could be categorized into dimeric OBPs subfamily, minus-C OBPs subfamily, and classical OBPs subfamily. Phylogenic analysis indicated that most maize weevil OBPs were closely related to their orthologues in other beetles of the Superfamily Curculionoidea. We further investigated the expression profiles of those candidate OBP genes by quantitative real-time polymerase chain reaction. Twenty-six of forty-one maize weevil OBP genes were highly expressed in the antennae or other parts of the head. The rest were expressed in the legs, wings, or other tested tissues. The antennal transcriptomic data and candidate OBP genes described here provide a basis for the functional studies of the maize weevil chemical perception, which are potential novel targets for pest control strategies.
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Affiliation(s)
- Qing-Feng Tang
- Department of Entomology, College of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Chen Shen
- Department of Entomology, College of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Ying Zhang
- Department of Entomology, College of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Zhi-Peng Yang
- Department of Entomology, College of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Rong-Rong Han
- Department of Entomology, College of Plant Protection, Anhui Agricultural University, Hefei, Anhui, China
| | - Jian Wang
- Department of Entomology, University of Maryland, College Park, Maryland
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24
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Cui SF, Wang L, Ma L, Wang YL, Qiu JP, Liu ZC, Geng XQ. Comparative transcriptome analyses of adzuki bean weevil (Callosobruchus chinensis) response to hypoxia and hypoxia/hypercapnia. Bull Entomol Res 2019; 109:266-277. [PMID: 29996954 DOI: 10.1017/s0007485318000512] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Stored product insects show high adaption to hypoxia and hypercapnia, but the underlying mechanism is still unclear. Herein, a comparative transcriptome on 4th adzuki bean weevil (Callosobruchus chinensis) instar larvae was studied to clarify the response mechanisms to hypoxia (HA) and hypoxia/hypercapnia (HHA) using NextSeq500 RNA-Seq. Transcript profiling showed a significant difference in HA or HHA exposure both quantitatively and qualitatively. Compared with control, 631 and 253 genes were significantly changed in HHA and HA, respectively. Comparing HHA with HA, 1135 differentially expressed genes (DEGs) were identified. The addition of hypercapnia made a complex alteration on the hypoxia response of bean weevil transcriptome, carbohydrate, energy, lipid and amino acid metabolism were the most highly enriched pathways for genes significantly changed. In addition, some biological processes that were not significantly enriched but important were also discussed, such as immune system and signal transduction. Most of the DEGs related to metabolism both in HHA and HA were up-regulated, while the DEGs related to the immune system, stress response or signal transduction were significantly down-regulated or suppressed. This research reveals a comparatively full-scale result in adzuki bean weevil hypoxia and hypoxia/hypercapnia tolerance mechanism at transcription level, which might provide new insights into the genomic research of this species.
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Affiliation(s)
- S F Cui
- School of Grain Science and Technology,Jiangsu University of Science and Technology,Zhenjiang 212004,China
| | - L Wang
- Department of Resources and Environment,School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China
| | - L Ma
- Behavioral & Physiological Ecology (BPE) Group,Groningen Institute for Evolutionary Life Sciences,University of Groningen,Nijenborgh 7,9747 AG Groningen,Netherlands
| | - Y L Wang
- Department of Resources and Environment,School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China
| | - J P Qiu
- Department of Resources and Environment,School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China
| | - Zh Ch Liu
- Department of Resources and Environment,School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China
| | - X Q Geng
- Department of Resources and Environment,School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China
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Lin B, Wang L, Hussain M, Zhang X, Tian J, Qi S, Liu X, Xiang M. Microbiota analysis revealed vertical transmission and microbial adjusting function of symbiotic fungus in the attelabid weevil fungiculture. Sci China Life Sci 2019; 62:1717-1721. [PMID: 30904975 DOI: 10.1007/s11427-018-9475-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 11/22/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Bin Lin
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lin Wang
- Institute of Apicultural Research, Chinese Academy of Agriculture Sciences, Beijing, 100093, China
| | - Muzammil Hussain
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xiaoling Zhang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jianqing Tian
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Sha Qi
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xingzhong Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Meichun Xiang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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Shepherd WP, Sullivan BT. Southern Pine Beetle (Coleoptera: Curculionidae: Scolytinae) Pheromone Component trans-Verbenol: Enantiomeric Specificity and Potential as a Lure Adjuvant. Environ Entomol 2019; 48:193-201. [PMID: 30476009 DOI: 10.1093/ee/nvy169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Indexed: 06/09/2023]
Abstract
The southern pine beetle, Dendroctonus frontalis Zimmermann (Coleoptera: Curculionidae: Scolytinae) utilizes a multi-component aggregation pheromone to mediate mass-attacks and thereby colonize otherwise unsusceptible trees. Females produce the attractant frontalin and a synergist, trans-verbenol. We investigated trans-verbenol to determine whether enantiomeric composition, airborne concentration, and possibly other factors might affect its biological activity. Newly-emerged females from Mississippi populations produced 54-87% of the (-)-enantiomer; females initiating galleries in logs produced lower amounts and a wider range of enantiomeric ratios [12-92% (-)]. Coupled gas chromatography-electroantennographic detection (GC-EAD) studies did not suggest large differences in the concentration threshold of olfaction for the two enantiomers. We examined the effect of adding trans-verbenol to traps located outside infested areas and baited with components of the aggregation attractant. Male attraction was similarly increased by lures with 3, 81, or 98% of the (-)-enantiomer of trans-verbenol, whereas females preferred 81 over 3%. When release rate of 81% (-)-trans-verbenol in traps was varied across three orders of magnitude (0.3, 3, and 30 mg/d), the data suggested a positive dose-response trend. A high release (i.e., 2-5 g/d) device of host-odor alpha-pinene had a much stronger enhancing effect on trap catches than a trans-verbenol device (~30 mg/d), and trans-verbenol did not further enhance attraction when alpha-pinene was present. Our results suggest that the weak attraction-enhancing activity of trans-verbenol reported previously cannot be improved by adjusting the enantiomeric composition or release rate of lures, and furthermore there are no anticipated benefits of adding trans-verbenol to the D. frontalis monitoring lure.
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Huang Y, Liao M, Yang Q, Xiao J, Hu Z, Cao H. iTRAQ-based quantitative proteome revealed metabolic changes of Sitophilus zeamais in response to terpinen-4-ol fumigation. Pest Manag Sci 2019; 75:444-451. [PMID: 30039555 DOI: 10.1002/ps.5135] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/15/2018] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Terpinen-4-ol has high insecticidal activity towards the stored-grain pest Sitophilus zeamais, a key pest of cereals worldwide. Comparative proteomic analysis can identify proteins related to the response to terpinen-4-ol fumigation in S. zeamais, improving our understanding of the mechanisms behind the insecticidal activity and the detoxification of terpinen-4-ol in insects. RESULTS Using an isobaric tags for relative and absolute quantification (iTRAQ)-based strategy, 2761 proteins were obtained from S. zeamais adults. Comparative proteomic analysis showed that 215 proteins were upregulated and 129 were downregulated after exposure to terpinen-4-ol. Based on functional classifications, differentially expressed proteins (DEPs) were enriched in the carbohydrate, energy and xenobiotics metabolism pathways. DEPs associated with lactose, sucrose and starch metabolism were identified, including alcohol dehydrogenase, aldose reductase, β-galactosidase, maltase, and myrosinase. Among detoxification-related proteins, the levels of 14 cytochrome P450s, seven glutathione S-transferases, and three UDP-glucuronosyltransferases were altered, most of which were upregulated after exposure to terpinen-4-ol. CONCLUSION Metabolic changes indicated that terpinen-4-ol could affect the energy supply and potentially be metabolized and detoxified by various enzymes in S. zeamais. The results provide a foundation for further functional studies of key proteins mediated by terpinen-4-ol. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Yong Huang
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Min Liao
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Qianqian Yang
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Jinjing Xiao
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Zhaoyin Hu
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Haiqun Cao
- College of Plant Protection, Anhui Agricultural University, Hefei, China
- Provincial Key Laboratory for Agri-Food Safety, Hefei, China
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28
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Isitt RL, Bleiker KP, Pureswaran DS, Hillier NK, Huber DPW. The Effect of Feeding and Mate Presence on the Pheromone Production of the Spruce Beetle (Coleoptera: Curculionidae). Environ Entomol 2018; 47:1293-1299. [PMID: 29982328 DOI: 10.1093/ee/nvy092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Indexed: 06/08/2023]
Abstract
Dendroctonus rufipennis (Kirby, Coleoptera: Curculionidae) uses pheromone blends containing aggregative components (frontalin, verbenene, 1-methyl-2-cyclohexen-1-ol [MCOL], and seudenol) and an anti-aggregative component (3-methyl-2-cyclohexen-1-one [MCH]) to coordinate attacks against host trees, but little is known about the influence of external stimuli on pheromone production. We conducted feeding experiments followed by pheromone extractions to determine if feeding duration and mate presence affected pheromone production in D. rufipennis. Unfed beetles of both sexes produced very little of any pheromone component. Females fed for 48 h produced significantly more MCH and MCOL compared to those which fed for 24 h. Males fed for 48 h produced significantly less seudenol than those which fed for 24 h. Male presence did not significantly affect female pheromone production. We propose that the pheromone blend produced by beetles transitions from aggregative to anti-aggregative shortly after colonizing a host, regardless of mate presence.
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Affiliation(s)
- R L Isitt
- Department of Biology, University of New Brunswick, Fredericton, Canada
| | - K P Bleiker
- Canadian Forest Service, Pacific Forestry Centre, Victoria, Canada
| | - D S Pureswaran
- Canadian Forest Service, Laurentian Forestry Centre, rue de PEPS, Quebec City, Canada
| | - N K Hillier
- Department of Biology, Acadia University, Wolfville, Canada
| | - D P W Huber
- Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, Canada
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Pandit AA, Ragionieri L, Marley R, Yeoh JGC, Inward DJG, Davies SA, Predel R, Dow JAT. Coordinated RNA-Seq and peptidomics identify neuropeptides and G-protein coupled receptors (GPCRs) in the large pine weevil Hylobius abietis, a major forestry pest. Insect Biochem Mol Biol 2018; 101:94-107. [PMID: 30165105 DOI: 10.1016/j.ibmb.2018.08.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 07/30/2018] [Accepted: 08/24/2018] [Indexed: 06/08/2023]
Abstract
Hylobius abietis (Linnaeus), or large pine weevil (Coleoptera, Curculionidae), is a pest of European coniferous forests. In order to gain understanding of the functional physiology of this species, we have assembled a de novo transcriptome of H. abietis, from sequence data obtained by Next Generation Sequencing. In particular, we have identified genes encoding neuropeptides, peptide hormones and their putative G-protein coupled receptors (GPCRs) to gain insights into neuropeptide-modulated processes. The transcriptome was assembled de novo from pooled paired-end, sequence reads obtained from RNA from whole adults, gut and central nervous system tissue samples. Data analysis was performed on the transcripts obtained from the assembly including, annotation, gene ontology and functional assignment as well as transcriptome completeness assessment and KEGG pathway analysis. Pipelines were created using Bioinformatics tools and techniques for prediction and identification of neuropeptides and neuropeptide receptors. Peptidomic analysis was also carried out using a combination of MALDI-TOF as well as Q-Exactive Orbitrap mass spectrometry to confirm the identified neuropeptide. 41 putative neuropeptide families were identified in H. abietis, including Adipokinetic hormone (AKH), CAPA and DH31. Neuropeptide F, which has not been yet identified in the model beetle T. castaneum, was identified. Additionally, 24 putative neuropeptide and 9 leucine-rich repeat containing G protein coupled receptor-encoding transcripts were determined using both alignment as well as non-alignment methods. This information, submitted to the NCBI sequence read archive repository (SRA accession: SRP133355), can now be used to inform understanding of neuropeptide-modulated physiology and behaviour in H. abietis; and to develop specific neuropeptide-based tools for H. abietis control.
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Affiliation(s)
- Aniruddha A Pandit
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
| | - Lapo Ragionieri
- Functional Peptidomics Group, Institute for Zoology, Department of Biology, University of Cologne, Zuelpicher Str. 47b, D-50674 Cologne, Germany
| | - Richard Marley
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
| | - Joseph G C Yeoh
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
| | | | - Shireen-Anne Davies
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
| | - Reinhard Predel
- Functional Peptidomics Group, Institute for Zoology, Department of Biology, University of Cologne, Zuelpicher Str. 47b, D-50674 Cologne, Germany
| | - Julian A T Dow
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK.
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Zagorchev LI, Albanova IA, Tosheva AG, Li J, Teofanova DR. Metabolic and functional distinction of the Smicronyx sp. galls on Cuscuta campestris. Planta 2018; 248:591-599. [PMID: 29808234 DOI: 10.1007/s00425-018-2926-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 05/23/2018] [Indexed: 06/08/2023]
Abstract
The weevil gall contains two distinct regions, differing in hydrolytic and antioxidant enzymes activity and profiles, which is also functionally distinct from the non-infected Cuscuta stems. Weevils of the genus Smicronyx are gall-forming insects, widely distributed on parasitic flowering plants of the genus Cuscuta. Thus, they are considered epiparasites and potential method for biological control of their agriculturally harmful hosts. Although several reports on gall formation in Cuscuta spp. exist, the metabolic and functional changes, occurring in the gall, remained largely unknown. Smicronyx sp. galls, collected from a wild Cuscuta campestris population, were dissected into two distinct regions, inner and outer cortex, defined by the higher chlorophyll content of the inner cortex. Based on hydrolytic and antioxidant enzymes activity and isoenzymatic profiles as analyzed after electrophoretic separation, we suggested that the gall differs in its metabolic activity from the non-infected plant tissue. While the outer cortex serves as a region of nutrient storage and mobilization, the inner cortex is directly involved in larvae nutrition. The increase in metabolic activity resulted in significantly increased superoxide dismutase activity in the gall, while several other antioxidant enzymes diminished. The present research offers new insights into the functionally differing regions of Smicronyx galls and the metabolic changes, induced in C. campestris in result of the gall formation.
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Affiliation(s)
- Lyuben I Zagorchev
- Department of Biochemistry, Faculty of Biology, Sofia University "St. Kliment Ohridski", 8 Dragan Tsankov Blvd., 1164, Sofia, Bulgaria.
| | - Ivanela A Albanova
- Department of Biochemistry, Faculty of Biology, Sofia University "St. Kliment Ohridski", 8 Dragan Tsankov Blvd., 1164, Sofia, Bulgaria
| | - Anita G Tosheva
- Department of Botany, Faculty of Biology, Sofia University "St. Kliment Ohridski", 8 Dragan Tsankov Blvd., 1164, Sofia, Bulgaria
| | - Junmin Li
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, China
| | - Denitsa R Teofanova
- Department of Biochemistry, Faculty of Biology, Sofia University "St. Kliment Ohridski", 8 Dragan Tsankov Blvd., 1164, Sofia, Bulgaria
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Zulkifli AN, Zakeri HA, Azmi WA. Food Consumption, Developmental Time, and Protein Profile of the Digestive System of the Red Palm Weevil, Rhynchophorus ferrugineus (Coleptera: Dryophthoridae) Larvae Reared on Three Different Diets. J Insect Sci 2018; 18:5114619. [PMID: 30285257 PMCID: PMC6169988 DOI: 10.1093/jisesa/iey093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Indexed: 06/08/2023]
Abstract
The red palm weevil (RPW), Rhynchophorus ferrugineus Olivier (Coleoptera: Dryophthoridae) is one of the most dangerous pests of major cultivated palms including coconut, oil palm, and sago. The larval stage of the weevil causes the most destruction of the palms as it completely destroys the palm cabbage. In this study, the larvae were given three different diets-coconut cabbage, oil palm cabbage, and sago stem, under laboratory conditions for food consumption and developmental time experiment. The protein profiles of the digestive systems of the larvae fed on these three diets were also determined. Although the coconut diet was the most consumed by RPW larvae compared to oil palm and sago diets, the growth rate of RPW larvae on oil palm diet was however significantly shorter than those on the coconut and sago diets: the RPW only need 1 mo and 9 d to complete the larval duration. Proteins profiling of eight 2-DE gel protein spots that range 50-20 kDa were identified by mass spectrometry sequence analysis. Based on the Matrix Science Software, the most dominant protein was cationic trypsin. However, based on the NCBI BLAST tool, aminopeptidase N was the most dominant enzyme. This finding can lead to the development of pest control strategies based on the antinutritional protease inhibitors as potential biocontrol agents. Urgent action to find effective control methods should be taken seriously as this weevil is presumed to be one of the serious pests of oil palm industry in Malaysia.
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Affiliation(s)
- Ainatun Nadrah Zulkifli
- School of Marine and Environmental Sciences, Universiti Malaysia Terengganu, Kuala Nerus, Terengganu, Malaysia
| | - Hazlina Ahamad Zakeri
- School of Fundamental Science, Universiti Malaysia Terengganu, Kuala Nerus, Terengganu, Malaysia
| | - Wahizatul Afzan Azmi
- School of Marine and Environmental Sciences, Universiti Malaysia Terengganu, Kuala Nerus, Terengganu, Malaysia
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Neupert S, Marciniak P, Köhler R, Nachman RJ, Suh CPC, Predel R. Different processing of CAPA and pyrokinin precursors in the giant mealworm beetle Zophobas atratus (Tenebrionidae) and the boll weevil Anthonomus grandis grandis (Curculionidae). Gen Comp Endocrinol 2018; 258:53-59. [PMID: 28867173 DOI: 10.1016/j.ygcen.2017.08.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 08/16/2017] [Accepted: 08/27/2017] [Indexed: 11/24/2022]
Abstract
Capa and pyrokinin (pk) genes in hexapods share a common evolutionary origin. Using transcriptomics and peptidomics, we analyzed products of these genes in two beetles, the giant mealworm beetle (Zophobas atratus; Tenebrionidae) and the boll weevil (Anthonomus grandis grandis; Curculionidae). Our data revealed that even within Coleoptera, which represents a very well-defined group of insects, highly different evolutionary developments occurred in the neuropeptidergic system. These differences, however, primarily affect the general structure of the precursors and differential processing of mature peptides and, to a lesser degree, the sequences of the active core motifs. With the differential processing of the CAPA-precursor in Z. atratus we found a perfect example of completely different products cleaved from a single neuropeptide precursor in different cells. The CAPA precursor in abdominal ganglia of this species yields primarily periviscerokinins (PVKs) whereas processing of the same precursor in neurosecretory cells of the subesophageal ganglion results in CAPA-tryptoPK and a novel CAPA-PK. Particularly important was the detection of that CAPA-PK which has never been observed in the CNS of insects before. The three different types of CAPA peptides (CAPA-tryptoPK, CAPA-PK, PVK) each represent potential ligands which activate different receptors. In contrast to the processing of the CAPA precursor from Z. atratus, no indications of a differential processing of the CAPA precursor were found in A. g. grandis. These data suggest that rapid evolutionary changes regarding the processing of CAPA precursors were still going on when the different beetle lineages diverged. The sequence of the single known PVK of A. g. grandis occupies a special position within the known PVKs of insects and might serve asa basis to develop lineage-specific peptidomimetics capable of disrupting physiological processes regulated by PVKs.
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Affiliation(s)
- Susanne Neupert
- Functional Peptidomics Group, Institute for Zoology, Department of Biology, University of Cologne, Zuelpicher Str. 47b, D-50674 Cologne, Germany; Insect Control and Cotton Disease Research Unit, Southern Plains Agricultural Research Center, US Department of Agriculture, College Station, TX 77845, United States
| | - Pawel Marciniak
- Functional Peptidomics Group, Institute for Zoology, Department of Biology, University of Cologne, Zuelpicher Str. 47b, D-50674 Cologne, Germany; Department of Animal Physiology and Development, Adam Mickiewicz University in Poznan, Umutlowska Str. 89, 61-614 Poznań, Poland
| | - Rene Köhler
- Functional Peptidomics Group, Institute for Zoology, Department of Biology, University of Cologne, Zuelpicher Str. 47b, D-50674 Cologne, Germany; Insect Control and Cotton Disease Research Unit, Southern Plains Agricultural Research Center, US Department of Agriculture, College Station, TX 77845, United States
| | - Ronald J Nachman
- Insect Control and Cotton Disease Research Unit, Southern Plains Agricultural Research Center, US Department of Agriculture, College Station, TX 77845, United States
| | - Charles P-C Suh
- Insect Control and Cotton Disease Research Unit, Southern Plains Agricultural Research Center, US Department of Agriculture, College Station, TX 77845, United States
| | - Reinhard Predel
- Functional Peptidomics Group, Institute for Zoology, Department of Biology, University of Cologne, Zuelpicher Str. 47b, D-50674 Cologne, Germany.
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Tittiger C, Blomquist GJ. Pheromone biosynthesis in bark beetles. Curr Opin Insect Sci 2017; 24:68-74. [PMID: 29208225 DOI: 10.1016/j.cois.2017.09.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 08/08/2017] [Accepted: 09/06/2017] [Indexed: 05/14/2023]
Abstract
Pine bark beetles rely on aggregation pheromones to coordinate mass attacks and thus reproduce in host trees. The structural similarity between many pheromone components and those of defensive tree resin led to early suggestions that pheromone components are metabolic derivatives of ingested precursors. This model has given way to our current understanding that most pheromone components are synthesized de novo. Their synthesis involves enzymes that modify products from endogenous metabolic pathways; some of these enzymes have been identified and characterized. Pheromone production is regulated in a complex way involving multiple signals, including JH III. This brief review summarizes progress in our understanding of this highly specialized metabolic process.
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Affiliation(s)
- Claus Tittiger
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, Reno, NV 89557, USA.
| | - Gary J Blomquist
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, Reno, NV 89557, USA
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Eyraud V, Balmand S, Karaki L, Rahioui I, Sivignon C, Delmas AF, Royer C, Rahbé Y, Da Silva P, Gressent F. The interaction of the bioinsecticide PA1b (Pea Albumin 1 subunit b) with the insect V-ATPase triggers apoptosis. Sci Rep 2017; 7:4902. [PMID: 28687751 PMCID: PMC5501856 DOI: 10.1038/s41598-017-05315-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 05/26/2017] [Indexed: 11/30/2022] Open
Abstract
PA1b (Pea Albumin 1, subunit b) peptide is an entomotoxin, extracted from Legume seeds, with a lethal activity towards several insect pests, such as mosquitoes, some aphids and cereal weevils. This toxin acts by binding to the subunits c and e of the plasma membrane H+-ATPase (V-ATPase) in the insect midgut. In this study, two cereal weevils, the sensitive Sitophilus oryzae strain WAA42, the resistance Sitophilus oryzae strain ISOR3 and the insensitive red flour beetle Tribolium castaneum, were used in biochemical and histological experiments to demonstrate that a PA1b/V-ATPase interaction triggers the apoptosis mechanism, resulting in insect death. Upon intoxication with PA1b, apoptotic bodies are formed in the cells of the insect midgut. In addition, caspase-3 enzyme activity occurs in the midgut of sensitive weevils after intoxication with active PA1b, but not in the midgut of resistant weevils. These biochemical data were confirmed by immuno-histochemical detection of the caspase-3 active form in the midgut of sensitive weevils. Immuno-labelling experiments also revealed that the caspase-3 active form and V-ATPase are close-localized in the insect midgut. The results concerning this unique peptidic V-ATPase inhibitor pave the way for the utilization of PA1b as a promising, more selective and eco-friendly insecticide.
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Affiliation(s)
- Vanessa Eyraud
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Séverine Balmand
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Lamis Karaki
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Isabelle Rahioui
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Catherine Sivignon
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Agnès F Delmas
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Rue Charles Sadron, 45071, Orléans, Cedex 2, France
| | - Corinne Royer
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Yvan Rahbé
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
- Univ Lyon, INRA, INSA-Lyon, CNRS UMR 5240 MAP, F-69622, Villeurbanne, France
| | - Pedro Da Silva
- Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France.
| | - Frédéric Gressent
- Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/SupAgro/INRA/UM2/CIRAD, F-34398, Montpellier, France
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Zhang C, Ma Z, Zhang X, Wu H. Transcriptomic alterations in Sitophilus zeamais in response to allyl isothiocyanate fumigation. Pestic Biochem Physiol 2017; 137:62-70. [PMID: 28364805 DOI: 10.1016/j.pestbp.2016.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 09/26/2016] [Accepted: 10/08/2016] [Indexed: 06/07/2023]
Abstract
To study the fumigation mechanisms of Allyl isothiocyanate (AITC) a promising biorational alternative to present fumigants (phosphine and methyl bromide), and provide theoretical basis for its further development in the control of stored grain pests, this research presents a transcriptome analysis of Sitophilus zeamais fumigated with AITC at the concentration of LC50 (5.69μg/mL) and control over 8h. 21,869,022 and 23,873,110 clean reads in insects fumigated with AITC and control were gained, respectively. The results of RNA-seq were confirmed by qRT-PCR determination of the expression levels of NADH dehydrogenase subunit 6 and Vacuolar ATP synthase subunit B in the insects fumigated with AITC at different concentrations. After enrichment analysis of differentially expressed genes, 117 over-expressed and 271 down-regulated transcripts were gained. Following GO enrichment, these transcripts were classified into 38 GO subgroups (at level 2), and the majority enriched GO terms were "Binding" "Cell process" and "metabolic". KEGG enrichment analysis showed that the majority enriched pathway were "Folding, sorting and degradation", "Transport and catabolism", "Energy metabolism", and "Carbohydrate metabolism". Connected with previous researches on mechanisms of isothiocyanates, cytoskeleton collapse and mitochondria dysfunction are proposed to be significant lethal mechanisms of AITC.
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Affiliation(s)
- Chao Zhang
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China
| | - Zhiqing Ma
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China
| | - Xing Zhang
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China.
| | - Hua Wu
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China.
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Xu L, Lu M, Xu D, Chen L, Sun J. Sexual variation of bacterial microbiota of Dendroctonus valens guts and frass in relation to verbenone production. J Insect Physiol 2016; 95:110-117. [PMID: 27677696 DOI: 10.1016/j.jinsphys.2016.09.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Revised: 09/21/2016] [Accepted: 09/22/2016] [Indexed: 06/06/2023]
Abstract
Gut microbiota are widely involved in insect biology, and many factors can influence the microbiota in guts and frass. Dendroctonus valens is a very destructive forest pest in China, and the mass-attacking behavior is regulated by several semiochemicals, including verbenone, a multifunctional pheromone. The beetle harbors a variety of bacteria in its guts and frass and some of them are capable of verbenone production. D. valens is characterized by monogamy and female-initiated attacking behavior. Whether the bacterial communities fluctuate according to sex, and whether the variation influences the verbenone production, remains to be determined. In this study, the bacterial microbiota in D. valens guts and frass were analyzed, and verbenone production by their crude bacterial suspensions was compared in vitro. Bacterial diversity in female frass is more abundant compared to male frass, and the percentages and total amounts of main genera like Lactococcus and Pseudomonas in female frass are significantly higher than those in male frass. The verbenone produced by the female frass suspension is significantly higher than male frass. This study presents a comprehensive comparison of bacterial communities in guts and frass between both sexes of D. valens, highlighting the potential significance of female frass microbiota in verbenone production.
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Affiliation(s)
- Letian Xu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing 100101, China; TEDA Institute of Biological Sciences and Biotechnology, Nankai University, TEDA, Tianjin 300457, China; Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Tianjin 300071, China
| | - Min Lu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing 100101, China
| | - Dandan Xu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li Chen
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianghua Sun
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing 100101, China.
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Yuan X, Jiang YD, Wang GY, Yu H, Zhou WW, Liu S, Yang MF, Cheng J, Gurr GM, Way MO, Zhu ZR. Odorant-Binding Proteins and Chemosensory Proteins from an Invasive Pest Lissorhoptrus oryzophilus (Coleoptera: Curculionidae). Environ Entomol 2016; 45:1276-1286. [PMID: 27569597 DOI: 10.1093/ee/nvw111] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 08/01/2016] [Indexed: 06/06/2023]
Abstract
The rice water weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae), is a serious pest species both in its original distribution region of northern America and its invaded regions of eastern Asia and southern Europe. The odorant-binding proteins (OBPs) and the chemosensory proteins (CSPs) play important roles in host and mate locating, thus might play a significant role in the success of the species as an invader, which has not been characterized yet. We identified 10 OBPs and 5 CSPs in L. oryzophilus and investigated the expression profiles of these genes in various tissues by quantitative real-time PCR. Five classic OBPs were predominantly expressed in the antennae. CSPs were expressed ubiquitously with particularly high transcript levels in antennae, legs, and wings. Three antenna-specific OBPs (LoOBP1, 8, 11) were up-regulated following 1-3 d of food deprivation and down-regulated afterward. These findings suggest most classic OBPs are likely involved in chemoreception whereas CSPs as well as the minus-C OBPs may have broader physiological functions, which in turn may help to understand the molecular aspects of chemical communication in this invasive insect.
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Affiliation(s)
- Xin Yuan
- State Key Laboratory of Rice Biology and Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, China (; ; ; ; ; ; ; ; )
| | - Yan-Dong Jiang
- State Key Laboratory of Rice Biology and Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, China (; ; ; ; ; ; ; ; )
| | - Gui-Yao Wang
- State Key Laboratory of Rice Biology and Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, China (; ; ; ; ; ; ; ; )
| | - Hang Yu
- State Key Laboratory of Rice Biology and Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, China (; ; ; ; ; ; ; ; )
| | - Wen-Wu Zhou
- State Key Laboratory of Rice Biology and Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, China (; ; ; ; ; ; ; ; )
| | - Su Liu
- State Key Laboratory of Rice Biology and Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, China (; ; ; ; ; ; ; ; )
| | - Mao-Fa Yang
- Institute of Entomology, Guizhou University, Guiyang, China
| | - Jiaan Cheng
- State Key Laboratory of Rice Biology and Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, China (; ; ; ; ; ; ; ; )
| | - Geoff M Gurr
- State Key Laboratory of Rice Biology and Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, China (; ; ; ; ; ; ; ; ) Graham Centre for Agricultural Innovation, Charles Sturt University, Orange, NSW, Australia
| | - Michael O Way
- Texas A&M AgriLife Research and Extension Center, Beaumont, TX
| | - Zeng-Rong Zhu
- State Key Laboratory of Rice Biology and Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, China (; ; ; ; ; ; ; ; )
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Soffan A, Antony B, Abdelazim M, Shukla P, Witjaksono W, Aldosari SA, Aldawood AS. Silencing the Olfactory Co-Receptor RferOrco Reduces the Response to Pheromones in the Red Palm Weevil, Rhynchophorus ferrugineus. PLoS One 2016; 11:e0162203. [PMID: 27606688 PMCID: PMC5015987 DOI: 10.1371/journal.pone.0162203] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 08/18/2016] [Indexed: 01/01/2023] Open
Abstract
The red palm weevil (RPW, Rhynchophorus ferrugineus), one of the most widespread of all invasive insect pest species, is a major cause of severe damage to economically important palm trees. RPW exhibits behaviors very similar to those of its sympatric species, the Asian palm weevil (R. vulneratus), which is restricted geographically to the southern part of Southeast Asia. Although efficient and sustainable control of these pests remains challenging, olfactory-system disruption has been proposed as a promising approach for controlling palm weevils. Here, we report the cloning and sequencing of an olfactory co-receptor (Orco) from R. ferrugineus (RferOrco) and R. vulneratus (RvulOrco) and examine the effects of RferOrco silencing (RNAi) on odorant detection. RferOrco and RvulOrco encoding 482 amino acids showing 99.58% identity. The injection of double-stranded RNA (dsRNA) from RferOrco into R. ferrugineus pupae significantly reduced RferOrco gene expression and led to the failure of odor-stimulus detection, as confirmed through olfactometer and electroantennography (EAG) assays. These results suggest that olfactory-system disruption leading to reduced pheromone detection holds great potential for RPW pest-control strategies.
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Affiliation(s)
- Alan Soffan
- King Saud University, Chair of Date Palm Research, Plant Protection Department, College of Food and Agricultural Sciences, Riyadh 11451, Saudi Arabia
| | - Binu Antony
- King Saud University, Chair of Date Palm Research, Plant Protection Department, College of Food and Agricultural Sciences, Riyadh 11451, Saudi Arabia
| | - Mahmoud Abdelazim
- King Saud University, Chair of Date Palm Research, Plant Protection Department, College of Food and Agricultural Sciences, Riyadh 11451, Saudi Arabia
| | - Paraj Shukla
- King Saud University, Chair of Date Palm Research, Plant Protection Department, College of Food and Agricultural Sciences, Riyadh 11451, Saudi Arabia
| | - Witjaksono Witjaksono
- Gadjah Mada University, Plant Protection Department, College of Agriculture, Yogyakarta 55281, Indonesia
| | - Saleh A. Aldosari
- King Saud University, Chair of Date Palm Research, Plant Protection Department, College of Food and Agricultural Sciences, Riyadh 11451, Saudi Arabia
| | - Abdulrahman S. Aldawood
- King Saud University, Plant Protection Department, College of Food and Agricultural Sciences, Riyadh 11451, Saudi Arabia
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Rodríguez SA, Pérez MLP, Nazareno MA. Identification of male-produced aggregation pheromone of the curculionid beetle Acrotomopus atropunctellus. Bull Entomol Res 2016; 106:494-501. [PMID: 27019030 DOI: 10.1017/s0007485316000146] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The sugarcane stem weevil, Acrotomopus atropunctellus (Boheman) (Curculionidae: Molytinae: Cholini) is an important economic pest from the Northwestern region of Argentina. Analyses of the headspace volatiles produced by separated males and females revealed one male-specific compound. Its structural identification is reported here in using gas chromatography coupled with mass spectroscopy analysis and chemical micro-reactions. Besides, two laboratory olfactometry assays allowed us to propose 6-methyl-5-hepten-2-one (sulcatone) as an aggregation pheromone for this insect, being attractive to both conspecific males and females. This compound is reported for the first time as involved in the Curculionidae family communication.
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Affiliation(s)
- S A Rodríguez
- Centro de Investigaciones y Transferencia de Santiago del Estero (CITSE), CONICET-UNSE,Santiago del Estero,Argentina
| | - M L P Pérez
- Sección Zoología Agrícola,Estación Experimental Agroindustrial Obispo Colombres, EEAOC-CONICET,Williams Cross 3150. Las Talitas,Tucumán,Argentina
| | - M A Nazareno
- Centro de Investigaciones y Transferencia de Santiago del Estero (CITSE), CONICET-UNSE,Santiago del Estero,Argentina
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Silva NCM, De Sá LFR, Oliveira EAG, Costa MN, Ferreira ATS, Perales J, Fernandes KVS, Xavier-Filho J, Oliveira AEA. Albizia lebbeck Seed Coat Proteins Bind to Chitin and Act as a Defense against Cowpea Weevil Callosobruchus maculatus. J Agric Food Chem 2016; 64:3514-3522. [PMID: 27078512 DOI: 10.1021/acs.jafc.6b00549] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The seed coat is an external tissue that participates in defense against insects. In some nonhost seeds, including Albizia lebbeck, the insect Callosobruchus maculatus dies during seed coat penetration. We investigated the toxicity of A. lebbeck seed coat proteins to C. maculatus. A chitin-binding protein fraction was isolated from seed coat, and mass spectrometry showed similarity to a C1 cysteine protease. By ELM program an N-glycosylation interaction motif was identified in this protein, and by molecular docking the potential to interact with N-acetylglucosamine (NAG) was shown. The chitin-binding protein fraction was toxic to C. maculatus and was present in larval midgut and feces but not able to hydrolyze larval gut proteins. It did not interfere, though, with the intestinal cell permeability. These results indicate that the toxicity mechanism of this seed coat fraction may be related to its binding to chitin, present in the larvae gut, disturbing nutrient absorption.
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Affiliation(s)
- Nadia C M Silva
- Laboratório de Quı́mica e Função de Proteı́nas e Peptı́deos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro-UENF , 28013602 Campos dos Goytacazes, RJ, Brazil
| | - Leonardo F R De Sá
- Laboratório de Quı́mica e Função de Proteı́nas e Peptı́deos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro-UENF , 28013602 Campos dos Goytacazes, RJ, Brazil
| | - Eduardo A G Oliveira
- Laboratório de Quı́mica e Função de Proteı́nas e Peptı́deos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro-UENF , 28013602 Campos dos Goytacazes, RJ, Brazil
| | - Monique N Costa
- Laboratório de Toxinologia, Fundação Oswaldo Cruz , Rio de Janeiro, FIOCRUZ-RJ, Brazil
| | - Andre T S Ferreira
- Laboratório de Toxinologia, Fundação Oswaldo Cruz , Rio de Janeiro, FIOCRUZ-RJ, Brazil
| | - Jonas Perales
- Laboratório de Toxinologia, Fundação Oswaldo Cruz , Rio de Janeiro, FIOCRUZ-RJ, Brazil
| | - Kátia V S Fernandes
- Laboratório de Quı́mica e Função de Proteı́nas e Peptı́deos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro-UENF , 28013602 Campos dos Goytacazes, RJ, Brazil
| | - Jose Xavier-Filho
- Laboratório de Quı́mica e Função de Proteı́nas e Peptı́deos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro-UENF , 28013602 Campos dos Goytacazes, RJ, Brazil
| | - Antonia E A Oliveira
- Laboratório de Quı́mica e Função de Proteı́nas e Peptı́deos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro-UENF , 28013602 Campos dos Goytacazes, RJ, Brazil
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41
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Kirsch R, Heckel DG, Pauchet Y. How the rice weevil breaks down the pectin network: Enzymatic synergism and sub-functionalization. Insect Biochem Mol Biol 2016; 71:72-82. [PMID: 26899322 DOI: 10.1016/j.ibmb.2016.02.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 02/12/2016] [Accepted: 02/14/2016] [Indexed: 05/19/2023]
Abstract
Pectin is the most complex polysaccharide in nature and highly abundant in plant cell walls and middle lamellae, where it functions in plant growth and development. Phytopathogens utilize plant pectin as an energy source through enzyme-mediated degradation. These pectolytic enzymes include polygalacturonases (PGs) of the GH28 family and pectin methylesterases (PMEs) of the CE8 family. Recently, PGs were also identified in herbivorous insects of the distantly related plant bug, stick insect and Phytophaga beetle lineages. Unlike all other insects, weevils possess PMEs in addition to PGs. To investigate pectin digestion in insects and the role of PMEs in weevils, all PME and PG family members of the rice weevil Sitophilus oryzae were heterologously expressed and functionally characterized. Enzymatically active and inactive PG and PME family members were identified. The loss of activity can be explained by a lack of substrate binding correlating with substitutions of functionally important amino acid residues. We found subfunctionalization in both enzyme families, supported by expression pattern and substrate specificities as well as evidence for synergistic pectin breakdown. Our data suggest that the rice weevil might be able to use pectin as an energy source, and illustrates the potential of both PG and PME enzyme families to functionally diversify after horizontal gene transfer.
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Affiliation(s)
- Roy Kirsch
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, Jena, 07745, Germany.
| | - David G Heckel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, Jena, 07745, Germany
| | - Yannick Pauchet
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, Jena, 07745, Germany.
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Zhang C, Wu H, Zhao Y, Ma Z, Zhang X. Comparative studies on mitochondrial electron transport chain complexes of Sitophilus zeamais treated with allyl isothiocyanate and calcium phosphide. Pestic Biochem Physiol 2016; 126:70-75. [PMID: 26778437 DOI: 10.1016/j.pestbp.2015.07.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 07/24/2015] [Accepted: 07/24/2015] [Indexed: 06/05/2023]
Abstract
With Sitophilus zeamais as the target organism, the present study for the first time attempted to elucidate the comparative effects between allyl isothiocyanate (AITC) and calcium phosphide (Ca3P2), exposure on mitochondrial electron transport chain (ETC.) complex I & IV and their downstream effects on enzymes relevant to reactive oxygen species (ROS). In vivo, both AITC and Ca3P2 inhibited complex I and IV with similar downstream effects. In contrast with Ca3P2, the inhibition of complex I caused by AITC was dependent on time and dose. In vitro, AITC inhibited complex IV more significantly than complex I. These results indicate that mitochondrial complex IV is the primary target of AITC, and that complex I is another potential target.
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Affiliation(s)
- Chao Zhang
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China
| | - Hua Wu
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China
| | - Yuan Zhao
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China
| | - Zhiqing Ma
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China
| | - Xing Zhang
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, PR China.
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43
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Dai L, Ma M, Wang C, Shi Q, Zhang R, Chen H. Cytochrome P450s from the Chinese white pine beetle, Dendroctonus armandi (Curculionidae: Scolytinae): Expression profiles of different stages and responses to host allelochemicals. Insect Biochem Mol Biol 2015; 65:35-46. [PMID: 26319543 DOI: 10.1016/j.ibmb.2015.08.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 08/17/2015] [Accepted: 08/21/2015] [Indexed: 06/04/2023]
Abstract
Bark beetles oxidize the defensive allelochemicals from their host trees to both detoxify and convert these materials into components of their pheromone system. The ability of this insect to adapt to its chemical environment might be explained by the action of major detoxification enzymes such as cytochrome P450s (or CYPs). Sixty-four sequences coding for P450s were identified, and most of the transcripts were found to be expressed in the larvae, pupae and adults of Dendroctonus armandi. To gain information on how these genes help D. armandi overcome the host defense, differential transcript levels of the CYP genes were observed between sexes and within the sexes. Significant differences were observed among developmental stages, in feeding on the phloem of Pinus armandi and in exposure to stimuli ((±)-α-pinene, (S)-(-)-α-pinene, (S)-(-)-β-pinene, (+)-3-carene, (±)-limonene and turpentine oil) for 8 h. We investigated the effect of sex and generations on the survivorship of individual D. armandi that were exposed to host volatiles at concentrations comparable to constitutive and induced levels of defense using fumigant exposure to understand the ability of the beetles to tolerate host defensive chemicals. The differential transcript accumulation patterns of CYP genes of these bark beetle provided insight into the ecological interactions of D. armandi with its host pine.
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Affiliation(s)
- Lulu Dai
- College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Mingyuan Ma
- College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Chunyan Wang
- College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Qi Shi
- College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Ranran Zhang
- College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Hui Chen
- College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China.
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44
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Ceja-Navarro JA, Vega FE, Karaoz U, Hao Z, Jenkins S, Lim HC, Kosina P, Infante F, Northen TR, Brodie EL. Gut microbiota mediate caffeine detoxification in the primary insect pest of coffee. Nat Commun 2015; 6:7618. [PMID: 26173063 PMCID: PMC4510693 DOI: 10.1038/ncomms8618] [Citation(s) in RCA: 241] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 05/26/2015] [Indexed: 01/23/2023] Open
Abstract
The coffee berry borer (Hypothenemus hampei) is the most devastating insect pest of coffee worldwide with its infestations decreasing crop yield by up to 80%. Caffeine is an alkaloid that can be toxic to insects and is hypothesized to act as a defence mechanism to inhibit herbivory. Here we show that caffeine is degraded in the gut of H. hampei, and that experimental inactivation of the gut microbiota eliminates this activity. We demonstrate that gut microbiota in H. hampei specimens from seven major coffee-producing countries and laboratory-reared colonies share a core of microorganisms. Globally ubiquitous members of the gut microbiota, including prominent Pseudomonas species, subsist on caffeine as a sole source of carbon and nitrogen. Pseudomonas caffeine demethylase genes are expressed in vivo in the gut of H. hampei, and re-inoculation of antibiotic-treated insects with an isolated Pseudomonas strain reinstates caffeine-degradation ability confirming their key role.
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Affiliation(s)
- Javier A. Ceja-Navarro
- Ecology Department, Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Fernando E. Vega
- Sustainable Perennial Crops Laboratory, United States Department of Agriculture, Agricultural Research Service, Building 001, BARC-W, Beltsville, Maryland 20705, USA
| | - Ulas Karaoz
- Ecology Department, Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Zhao Hao
- Ecology Department, Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Stefan Jenkins
- Genome Dynamics Department, Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Hsiao Chien Lim
- Ecology Department, Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Petr Kosina
- International Maize and Wheat Improvement Center (CIMMYT), Carretera Mexico-Veracruz Km. 45, El Batán, Texcoco 56130, Mexico
| | - Francisco Infante
- El Colegio de la Frontera Sur (ECOSUR), Carretera Antiguo Aeropuerto Km. 2.5, Tapachula, Chiapas 30700, Mexico
| | - Trent R. Northen
- Genome Dynamics Department, Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Eoin L. Brodie
- Ecology Department, Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Environmental Science, Policy and Management, University of California, Berkeley, California 94720, USA
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45
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Tampe J, Parra L, Huaiquil K, Mutis A, Quiroz A. Repellent Effect and Metabolite Volatile Profile of the Essential Oil of Achillea millefolium Against Aegorhinus nodipennis (Hope) (Coleoptera: Curculionidae). Neotrop Entomol 2015; 44:279-285. [PMID: 26013273 DOI: 10.1007/s13744-015-0278-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 02/01/2015] [Indexed: 06/04/2023]
Abstract
Aegorhinus nodipennis (Hope) (Coleoptera: Curculionidae) is an important native pest in fruit crops that is mainly found in European hazelnut fields in the south of Chile. We investigated the behavioral response of A. nodipennis to volatile compounds released from the essential oil of Achillea millefolium and its main constituent using olfactometric bioassays. Gas chromatographic and mass spectral analysis of the A. millefolium essential oil revealed the presence of 11 compounds. Monoterpene β-thujone (96.2%) was the main component of the oil. Other compounds identified were α-thujone, 1,8-cineole, p-cymene, and 4-terpineol, all with percentages below 1%. Both A. millefolium essential oil and thujone exhibited a repellent activity against this insect at the higher doses tested (285.7 ng/cm(2)), demonstrating their potential as repellents for this species.
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Affiliation(s)
- J Tampe
- Lab de Química Ecológica, Depto de Ciencias Químicas y Recursos Naturales, Univ de La Frontera, Temuco, Chile
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Haddi K, Mendonça LP, Dos Santos MF, Guedes RNC, Oliveira EE. Metabolic and Behavioral Mechanisms of Indoxacarb Resistance in Sitophilus zeamais (Coleoptera: Curculionidae). J Econ Entomol 2015; 108:362-369. [PMID: 26470140 DOI: 10.1093/jee/tou049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 11/15/2014] [Indexed: 06/05/2023]
Abstract
The control of the most important pest of stored maize, the weevil Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae), is mainly achieved with the use of pyrethroid insecticides. However, the intensive use of these compounds has led to the selection of resistant populations and has compromised the control efficacy of this insect pest. Here, the toxicity of indoxacarb for a potential use in the control of S. zeamais was assessed on 13 Brazilian populations. Concentration-mortality bioassays, in the presence of synergists (piperonyl butoxide, triphenyl phosphate, and diethyl maleate), were used to assess potential metabolic-based indoxacarb resistance mechanisms. We also assessed the behavioral (locomotory) responses of these populations to indoxacarb exposure. The results showed significant differences between the populations (LD50 values ranged from 0.06 to 13.99 mg a.i/kg of grains), resulting in resistance ratios of >200-fold between the least (Canarana-MT) and the most (Espirito Santo do Pinhal-SP) susceptible populations. The results obtained with synergized indoxacarb suggest the involvement of esterases and glutathione-S-transferases on indoxacarb action, and also suggest the involvement of cytochrome P450-dependent monooxygenases as a potential indoxacarb resistance mechanism in Brazilian populations of S. zeamais. Although indoxacarb-induced behavioral avoidance varied among populations, some resistant populations (e.g., Canarana-MT) were able to reduce exposure to indoxacarb by spending more time in the nontreated areas. Collectively, our findings indicate that the behavioral (locomotory) and physiological responses of these insects may compromise the control efficacy of oxadiazine insecticides (e.g., indoxacarb) in Brazilian populations of S. zeamais.
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Affiliation(s)
- Khalid Haddi
- Science without Border Associate Researcher, Programa de Pós-Graduação em Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil. Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil
| | - Larine P Mendonça
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil
| | - Milaine F Dos Santos
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil
| | - Raul Narciso C Guedes
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil
| | - Eugênio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil.
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47
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Medel V, Palma R, Mercado D, Rebolledo R, Quiroz A, Mutis A. The Effect of Protease Inhibitors on Digestive Proteolytic Activity in the Raspberry Weevil, Aegorhinus superciliosus (Guérin) (Coleoptera: Curculionidae). Neotrop Entomol 2015; 44:77-83. [PMID: 26013015 DOI: 10.1007/s13744-014-0250-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 10/13/2014] [Indexed: 06/04/2023]
Abstract
The raspberry weevil, Aegorhinus superciliosus (Guérin) (Coleoptera: Curculionidae), is an economically important pest of blueberry in southern Chile. The digestive protease activity of adult insects was investigated using general and specific substrates and inhibitors. Enzymatic assays demonstrated the presence of trypsin- and chymotrypsin-like serine proteinases. Furthermore, in vitro assays using phenylmethylsulfonyl fluoride (PMSF) and soybean trypsin inhibitor (SBTI) at 0.01 and 0.1 mM showed percentages of enzymatic inhibition between 0 and 16% for PMSF and 67 to 76% for SBTI, whereas in vivo assays indicated that SBTI caused between 50 and 90% mortality in males and between 80 and 100% in females. Our data indicate the presence of serine proteases and suggest that digestive proteases could be a target for the design and development of strategies to control the raspberry weevil.
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Affiliation(s)
- V Medel
- Lab de Química Ecológica, Depto de Ciencias Químicas y Recursos Naturales, Univ de La Frontera, Temuco, Araucanía, Chile
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48
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Sun X, Small GE, Zhou X, Wang D, Li H, Liu C. Variation in C:N:S stoichiometry and nutrient storage related to body size in a holometabolous insect (Curculio davidi) (Coleoptera: Curculionidae) larva. J Insect Sci 2015; 15:iev004. [PMID: 25843579 PMCID: PMC4535141 DOI: 10.1093/jisesa/iev004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 12/23/2014] [Indexed: 05/14/2023]
Abstract
Body size can be an important factor controlling consumer stoichiometry. In holometabolous insects, body size is typically associated with nutrient storage. Consumer stoichiometry is known to vary within species across a range of body sizes; however, the contribution of nutrient storage to this variation is not well understood. We used the fifth-instar larvae of the oak weevil (Coleoptera: Curculio davidi Fairmaire), which is characterized by a high capacity for nutrient storage, to investigate the effect of shifts in nutrient storage with body mass on variations in larva stoichiometry. Our results showed that weevil larvae with larger body mass had a lower carbon (C) content, reflecting decreases in the sequestration rate of C-rich lipids. Larger larvae had elevated concentrations of nitrogen (N), sulfur (S), and protein. The similar patterns of variation in elemental composition and macromolecule storage with body weight indicate that the shift in nutrient storage is the main factor causing the variation in larval stoichiometry with body weight. This finding was further supported by the low variation in residual larval biomass C, N, and S concentrations after lipid extraction. These results help decipher the physiological mechanism of stoichiometric regulation in growing organisms.
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Affiliation(s)
- Xiao Sun
- School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Dongchuan Rd. 800, Shanghai 200240, China College of Agro-grassland Science, Nanjing Agricultural University, 1 Weigang Rd., Nanjing, 210095, China
| | - Gaston E Small
- Department of Biology, University of St. Thomas, Saint Paul, MN 55105
| | - Xuan Zhou
- School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Dongchuan Rd. 800, Shanghai 200240, China
| | - Donger Wang
- College of Agro-grassland Science, Nanjing Agricultural University, 1 Weigang Rd., Nanjing, 210095, China
| | - Hongwang Li
- School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Dongchuan Rd. 800, Shanghai 200240, China
| | - Chunjiang Liu
- School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Dongchuan Rd. 800, Shanghai 200240, China Shanghai Urban Forest Ecosystem Research Station, State Forestry Administration, People's Republic of China, Dongchuan Rd. 800, Shanghai 200240, China
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Pitt C, Robert JA, Bonnett TR, Keeling CI, Bohlmann J, Huber DPW. Proteomics indicators of the rapidly shifting physiology from whole mountain pine beetle, Dendroctonus ponderosae (Coleoptera: Curculionidae), adults during early host colonization. PLoS One 2014; 9:e110673. [PMID: 25360753 PMCID: PMC4215907 DOI: 10.1371/journal.pone.0110673] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 09/16/2014] [Indexed: 01/08/2023] Open
Abstract
We developed proteome profiles for host colonizing mountain pine beetle adults, Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae). Adult insects were fed in pairs on fresh host lodgepole pine, Pinus contorta Dougl. ex Loud, phloem tissue. The proteomes of fed individuals were monitored using iTRAQ and compared to those of starved beetles, revealing 757 and 739 expressed proteins in females and males, respectively, for which quantitative information was obtained. Overall functional category distributions were similar for males and females, with the majority of proteins falling under carbohydrate metabolism (glycolysis, gluconeogenesis, citric acid cycle), structure (cuticle, muscle, cytoskeleton), and protein and amino acid metabolism. Females had 23 proteins with levels that changed significantly with feeding (p<0.05, FDR<0.20), including chaperones and enzymes required for vitellogenesis. In males, levels of 29 proteins changed significantly with feeding (p<0.05, FDR<0.20), including chaperones as well as motor proteins. Only two proteins, both chaperones, exhibited a significant change in both females and males with feeding. Proteins with differential accumulation patterns in females exhibited higher fold changes with feeding than did those in males. This difference may be due to major and rapid physiological changes occurring in females upon finding a host tree during the physiological shift from dispersal to reproduction. The significant accumulation of chaperone proteins, a cytochrome P450, and a glutathione S-transferase, indicate secondary metabolite-induced stress physiology related to chemical detoxification during early host colonization. The females' activation of vitellogenin only after encountering a host indicates deliberate partitioning of resources and a balancing of the needs of dispersal and reproduction.
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Affiliation(s)
- Caitlin Pitt
- Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, BC, Canada
- * E-mail: (DH); (CP)
| | - Jeanne A. Robert
- Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, BC, Canada
| | - Tiffany R. Bonnett
- Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, BC, Canada
| | | | - Jörg Bohlmann
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
| | - Dezene P. W. Huber
- Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, BC, Canada
- * E-mail: (DH); (CP)
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Dai L, Wang C, Zhang X, Yu J, Zhang R, Chen H. Two CYP4 genes of the Chinese white pine beetle, Dendroctonus armandi (Curculionidae: Scolytinae), and their transcript levels under different development stages and treatments. Insect Mol Biol 2014; 23:598-610. [PMID: 25039485 DOI: 10.1111/imb.12108] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bark beetles oxidize the defensive monoterpenes of their host trees both to detoxify them and to convert them into components of their pheromone system. This oxidation is catalysed by cytochrome P450 (CYP) enzymes and occurs in different stages of the insect. We identified two new CYP4 genes in the Chinese white pine beetle (Dendroctonus armandi), and carried out bioinformatic analysis one the full-length nucleic acid sequences and deduced amino acid sequences. Differential expression of the CYP4 genes was observed between sexes, and within these significant differences amongst development stages, fed on phloem of Pinus armandi and exposed to stimuli((±)- α-pinene, (R)-(+)- α-pinene, (S)-(-)-α-pinene, (S)-(-)-β-pinene and (+)-3-carene) at 8 and 24 h, and their interactions were found upon exposure to host monoterpenes. Increased expression of CYP4 genes suggested that they play a role in the detoxification of monoterpenes released by the host trees. The differential transcript accumulation patterns of these bark beetle CYP4 genes provides insight into the ecological interactions of D. armandi with its host pine.
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Affiliation(s)
- L Dai
- College of Forestry, Northwest A&F University, Yangling, China
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