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Gao X, Hu F, Cui H, Zhu X, Wang L, Zhang K, Li D, Ji J, Luo J, Cui J. Glyphosate decreases survival, increases fecundity, and alters the microbiome of the natural predator Harmonia axyridis (ladybird beetle). ENVIRONMENTAL RESEARCH 2023; 238:117174. [PMID: 37739152 DOI: 10.1016/j.envres.2023.117174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/13/2023] [Accepted: 09/17/2023] [Indexed: 09/24/2023]
Abstract
Glyphosate is a widely-used herbicide that shows toxicity to non-target organisms. The predatory natural enemy Harmonia axyridis may ingest glyphosate present in pollen and aphid prey. The present study characterized the responses of adult H. axyridis to environmentally relevant concentrations of glyphosate (5, 10, and 20 mg/L) for one or five days. There were no obvious effects on adult H. axyridis survival rates or fecundity in response to 5 or 10 mg/L glyphosate. However, exposure to 20 mg/L glyphosate significantly reduced the survival rate and increased fecundity. Analysis of the adult H. axyridis microbiota with 16S rRNA sequencing demonstrated changes in the relative and/or total abundance of specific taxa, including Serratia, Enterobacter, Staphylococcus, and Hafnia-Obesumbacterium. These changes in symbiotic bacterial abundance may have led to changes in survival rates or fecundity of this beetle. This is the first report of herbicide-induced stimulation of fecundity in a non-target predatory natural enemy, reflecting potentially unexpected risks of glyphosate exposure in adult H. axyridis. Although glyphosate resistant crops have been widely planted, the results of this study indicate a need to strengthen glyphosate management to prevent over-use, which could cause glyphosate toxicity and threaten environmental and human health.
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Affiliation(s)
- Xueke Gao
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Fangmei Hu
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China; Zhongjian township People's Government of Qianxi county, Bijie, 551500, Guizhou, China
| | - Huanfei Cui
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Xiangzhen Zhu
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Li Wang
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Kaixin Zhang
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Dongyang Li
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Jichao Ji
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China.
| | - Junyu Luo
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China.
| | - Jinjie Cui
- National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China.
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Archer J, Hurst GDD, Hornett EA. Male-killer symbiont screening reveals novel associations in Adalia ladybirds. Access Microbiol 2023; 5:acmi000585.v3. [PMID: 37601442 PMCID: PMC10436010 DOI: 10.1099/acmi.0.000585.v3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 05/18/2023] [Indexed: 08/22/2023] Open
Abstract
While male-killing bacteria are known to infect across arthropods, ladybird beetles represent a hotspot for these symbioses. In some host species, there are multiple different symbionts that vary in presence and frequency between populations. To further our understanding of spatial and frequency variation, we tested for the presence of three male-killing bacteria: Wolbachia , Rickettsia and Spiroplasma , in two Adalia ladybird species from a previously unexplored UK population. The two-spot ladybird, A. bipunctata, is known to harbour all three male-killers, and we identified Spiroplasma infection in the Merseyside population for the first time. However, in contrast to previous studies on two-spot ladybirds from continental Europe, evidence from egg-hatch rates indicates the Spiroplasma strain present in the Merseyside population does not cause embryonic male-killing. In the related ten-spot ladybird, A. decempunctata, there is only one previous record of a male-killing symbiont, a Rickettsia , which we did not detect in the Merseyside sample. However, PCR assays indicated the presence of a Spiroplasma in a single A. decempunctata specimen. Marker sequence indicated that this Spiroplasma was divergent from that found in sympatric A. bipunctata. Genome sequencing of the Spiroplasma -infected A. decempunctata additionally revealed the presence of cobionts in the form of a Centistes parasitoid wasp and the parasitic fungi Beauveria. Further study of A. decempunctata from this population is needed to resolve whether it is the ladybird or wasp cobiont that harbours Spiroplasma , and to establish the phenotype of this strain. These data indicate first that microbial symbiont phenotype should not be assumed from past studies conducted in different locations, and second that cobiont presence may confound screening studies aimed to detect the frequency of a symbiont in field collected material from a focal host species.
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Affiliation(s)
- Jack Archer
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Gregory D. D. Hurst
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Emily A. Hornett
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
- Vector Biology, Liverpool School of Tropical Medicine, Liverpool, UK
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Du L, Xue H, Hu F, Zhu X, Wang L, Zhang K, Li D, Ji J, Niu L, Luo J, Cui J, Gao X. Dynamics of symbiotic bacterial community in whole life stage of Harmonia axyridis (Coleoptera: Coccinellidae). Front Microbiol 2022; 13:1050329. [PMID: 36532478 PMCID: PMC9751998 DOI: 10.3389/fmicb.2022.1050329] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 11/11/2022] [Indexed: 02/06/2024] Open
Abstract
INTRODUCTION Bacteria play critical roles in the reproduction, metabolism, physiology, and detoxification of their insect hosts. The ladybird beetle (Harmonia axyridis) harbors a myriad of endosymbiotic microbes. However, to date, little is known about how the microbial composition of H. axyridis varies throughout its life cycle. METHODS In this study, 16S rRNA amplicon sequencing and quantitative PCR were employed to investigate the diversity and dynamics of bacterial symbionts across the egg, larval, pupae, and adults stages of H. axyridis. RESULTS Higher bacterial community richness and diversity were observed in eggs, followed by those in adults and pupae. The community richness index differed significantly between second-instar larvae and other developmental stages. Proteobacteria, Firmicutes, and Actinobacteria were the dominant phyla. Staphylococcus, Enterobacter, Glutamicibacter, and Acinetobacter were the dominant bacteria genera; however, their relative abundances fluctuated across host developmental stages. Interestingly, the larval stage harbored high proportions of Firmicutes, whereas the adult microbial community largely consisted of Proteobacteria. DISCUSSION This study is the first to determine the symbiotic bacterial composition across key life stages of H. axyridis. These outcomes can foster the development of environmental risk assessments and novel biological control strategies.
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Affiliation(s)
- Lingen Du
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Hui Xue
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Fangmei Hu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Xiangzhen Zhu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Li Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Kaixin Zhang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Dongyang Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Jichao Ji
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Lin Niu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Junyu Luo
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Jinjie Cui
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Xueke Gao
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
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Gao X, Hu F, Zhang S, Luo J, Zhu X, Wang L, Zhang K, Li D, Ji J, Niu L, Wu C, Cui J. Glyphosate exposure disturbs the bacterial endosymbiont community and reduces body weight of the predatory ladybird beetle Harmonia axyridis (Coleoptera: Coccinellidae). THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 790:147847. [PMID: 34082325 DOI: 10.1016/j.scitotenv.2021.147847] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/15/2021] [Accepted: 05/15/2021] [Indexed: 06/12/2023]
Abstract
The predatory ladybird beetle, Harmonia axyridis, is a predominant natural enemy of pest insects in cotton fields. Commercialization of genetically modified crops has promoted the increased use of the herbicide glyphosate. In this study, to assess potential negative effects of glyphosate on beneficial non-target organisms in cotton fields, we first examined how glyphosate exposure affected the development and endosymbiotic bacterial community of H. axyridis. The results showed that the survival rate, development duration, pupation rate and emergence rate of H. axyridis under low and high concentrations of glyphosate exposure were not significantly changed, but glyphosate did significantly reduce the body weight of H. axyridis. Based on 16S rRNA sequencing, there were no significant differences in the diversity or richness of the endosymbiotic bacteria of H. axyridis before and after glyphosate exposure. The dominant bacterial phyla Firmicutes and Proteobacteria and genera Staphylococcus and Enterobacter remained the same regardless of treatment with glyphosate, however the abundance and copy number of these bacteria were altered. Glyphosate treatment significantly reduced the abundance and gene copy number of Staphylococcus and increased the abundance and gene copy number of Enterobacter. This is the first report demonstrating that glyphosate can reduce the body weight H. axyridis and alter the bacterial endosymbiont community by affecting the abundance and gene copy number of dominant bacteria.
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Affiliation(s)
- Xueke Gao
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China; Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, 4550001 Zhengzhou, China
| | - Fangmei Hu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China; Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, Huazhong Agricultural University, Wuhan 430070, China
| | - Shuai Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Junyu Luo
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China
| | - Xiangzhen Zhu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China
| | - Li Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China
| | - Kaixin Zhang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China
| | - Dongyang Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China
| | - Jichao Ji
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China
| | - Lin Niu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China
| | - Changcai Wu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China
| | - Jinjie Cui
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China; Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, 4550001 Zhengzhou, China.
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Lejal E, Chiquet J, Aubert J, Robin S, Estrada-Peña A, Rue O, Midoux C, Mariadassou M, Bailly X, Cougoul A, Gasqui P, Cosson JF, Chalvet-Monfray K, Vayssier-Taussat M, Pollet T. Temporal patterns in Ixodes ricinus microbial communities: an insight into tick-borne microbe interactions. MICROBIOME 2021; 9:153. [PMID: 34217365 PMCID: PMC8254910 DOI: 10.1186/s40168-021-01051-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 03/17/2021] [Indexed: 06/01/2023]
Abstract
BACKGROUND Ticks transmit pathogens of medical and veterinary importance and are an increasing threat to human and animal health. Assessing disease risk and developing new control strategies requires identifying members of the tick-borne microbiota as well as their temporal dynamics and interactions. METHODS Using high-throughput sequencing, we studied the Ixodes ricinus microbiota and its temporal dynamics. 371 nymphs were monthly collected during three consecutive years in a peri-urban forest. After a Poisson lognormal model was adjusted to our data set, a principal component analysis, sparse network reconstruction, and differential analysis allowed us to assess seasonal and monthly variability of I. ricinus microbiota and interactions within this community. RESULTS Around 75% of the detected sequences belonged to five genera known to be maternally inherited bacteria in arthropods and to potentially circulate in ticks: Candidatus Midichloria, Rickettsia, Spiroplasma, Arsenophonus and Wolbachia. The structure of the I. ricinus microbiota varied over time with interannual recurrence and seemed to be mainly driven by OTUs commonly found in the environment. Total network analysis revealed a majority of positive partial correlations. We identified strong relationships between OTUs belonging to Wolbachia and Arsenophonus, evidence for the presence of the parasitoid wasp Ixodiphagus hookeri in ticks. Other associations were observed between the tick symbiont Candidatus Midichloria and pathogens belonging to Rickettsia. Finally, more specific network analyses were performed on TBP-infected samples and suggested that the presence of pathogens belonging to the genera Borrelia, Anaplasma and Rickettsia may disrupt microbial interactions in I. ricinus. CONCLUSIONS We identified the I. ricinus microbiota and documented marked shifts in tick microbiota dynamics over time. Statistically, we showed strong relationships between the presence of specific pathogens and the structure of the I. ricinus microbiota. We detected close links between some tick symbionts and the potential presence of either pathogenic Rickettsia or a parasitoid in ticks. These new findings pave the way for the development of new strategies for the control of ticks and tick-borne diseases. Video abstract.
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Affiliation(s)
- E Lejal
- UMR BIPAR, Animal Health Laboratory, INRAE, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, Maisons-Alfort, France
| | - J Chiquet
- Université Paris-Saclay, AgroParisTech, INRAE, UMR MIA-Paris, 75005, Paris, France
| | - J Aubert
- Université Paris-Saclay, AgroParisTech, INRAE, UMR MIA-Paris, 75005, Paris, France
| | - S Robin
- Université Paris-Saclay, AgroParisTech, INRAE, UMR MIA-Paris, 75005, Paris, France
| | - A Estrada-Peña
- Faculty of Veterinary Medicine, University of Zaragoza, Zaragoza, Spain
| | - O Rue
- INRAE, MaIAGE, Université Paris-Saclay, Jouy-en-Josas, France
- INRAE, BioinfOmics, MIGALE Bioinformatics Facility, Université Paris-Saclay, Jouy-en-Josas, France
| | - C Midoux
- INRAE, MaIAGE, Université Paris-Saclay, Jouy-en-Josas, France
- INRAE, BioinfOmics, MIGALE Bioinformatics Facility, Université Paris-Saclay, Jouy-en-Josas, France
- INRAE, PROSE, Université Paris-Saclay, Antony, France
| | - M Mariadassou
- INRAE, MaIAGE, Université Paris-Saclay, Jouy-en-Josas, France
- INRAE, BioinfOmics, MIGALE Bioinformatics Facility, Université Paris-Saclay, Jouy-en-Josas, France
| | - X Bailly
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR EPIA, 63122, Saint Genes Champanelle, France
- Université de Lyon, INRAE, VetAgro Sup, UMR EPIA, 69280, Marcy l'Etoile, France
| | - A Cougoul
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR EPIA, 63122, Saint Genes Champanelle, France
- Université de Lyon, INRAE, VetAgro Sup, UMR EPIA, 69280, Marcy l'Etoile, France
| | - P Gasqui
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR EPIA, 63122, Saint Genes Champanelle, France
- Université de Lyon, INRAE, VetAgro Sup, UMR EPIA, 69280, Marcy l'Etoile, France
| | - J F Cosson
- UMR BIPAR, Animal Health Laboratory, INRAE, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, Maisons-Alfort, France
| | - K Chalvet-Monfray
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR EPIA, 63122, Saint Genes Champanelle, France
- Université de Lyon, INRAE, VetAgro Sup, UMR EPIA, 69280, Marcy l'Etoile, France
| | | | - T Pollet
- UMR ASTRE, CIRAD, INRAE, Campus de Baillarguet, Montpellier, France.
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Szawaryn K, Nedvěd O, Biranvand A, Czerwiński T, Nattier R. Revision of the genus Coccidula Kugelann (Coleoptera, Coccinellidae). Zookeys 2021; 1043:61-85. [PMID: 34163295 PMCID: PMC8213682 DOI: 10.3897/zookeys.1043.65829] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 05/05/2021] [Indexed: 11/12/2022] Open
Abstract
The genus Coccidula Kugelann includes five species distributed in the Holarctic, with one species in North America and four in Palearctic region. Coccidula belongs to the tribe Coccidulini which historically was treated as a separate subfamily within ladybird beetles, but recent studies confirmed its placement as a tribe within the broadly defined subfamily Coccinellinae. All species are revised and a new synonymy of Lithophilusnaviauxi Duverger with C.litophiloides Reitter is proposed. Light and electron microscopy pictures support morphological descriptions. An identification key to all species is also provided.
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Affiliation(s)
- Karol Szawaryn
- Museum and Institute of Zoology, Polish Academy of Sciences, Wilcza 64, 00-679 Warszawa, Poland Museum and Institute of Zoology, Polish Academy of Sciences Warszawa Poland
| | - Oldřich Nedvěd
- Faculty of Science, University of South Bohemia, Branišovská 1760, CZ-37005 České Budějovice, Czech Republic University of South Bohemia České Budějovice Czech Republic.,Czech Academy of Sciences, Biology Centre, Institute of Entomology, České Budějovice, Czech Republic Czech Academy of Sciences, Biology Centre, Institute of Entomology České Budějovice Czech Republic
| | - Amir Biranvand
- Department of Entomology, College of Agricultural Sciences, Shiraz Branch, Islamic Azad University, Shiraz, Iran Islamic Azad University Shiraz Iran
| | - Tomasz Czerwiński
- Museum and Institute of Zoology, Polish Academy of Sciences, Wilcza 64, 00-679 Warszawa, Poland Museum and Institute of Zoology, Polish Academy of Sciences Warszawa Poland
| | - Romain Nattier
- Institut de Systématique, Evolution et Biodiversité (ISYEB), Muséum national d'Histoire naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP 50, 75231, Paris Cedex 05, France Sorbonne Université Paris France
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Li H, Shu X, Meng L, Zhou X, Obrycki JJ, Li B. Prevalence of maternally-inherited bacteria in native and invasive populations of the harlequin ladybird beetle Harmonia axyridis. Biol Invasions 2021. [DOI: 10.1007/s10530-020-02451-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Flatau R, Segoli M, Hawlena H. Wolbachia Endosymbionts of Fleas Occur in All Females but Rarely in Males and Do Not Show Evidence of Obligatory Relationships, Fitness Effects, or Sex-Distorting Manipulations. Front Microbiol 2021; 12:649248. [PMID: 33776981 PMCID: PMC7994249 DOI: 10.3389/fmicb.2021.649248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 02/15/2021] [Indexed: 12/04/2022] Open
Abstract
The widespread temporal and spatial persistence of endosymbionts in arthropod host populations, despite potential conflicts with their hosts and fluctuating environmental conditions, is puzzling. Here, we disentangled three main mechanisms that are commonly proposed to explain such persistence, namely, obligatory relationships, in which the host is fully dependent on its endosymbiont, fitness advantages conferred by the endosymbiont, and reproductive manipulations imposed by the endosymbiont. Our model system reflects an extreme case, in which the Wolbachia endosymbiont persists in all female flea hosts but rarely in male ones. We cured fleas of both sexes of Wolbachia but found no indications for either lower reproduction, offspring survival, or a change in the offspring sex ratio, compared to Wolbacia-infected fleas. These results do not support any of the suggested mechanisms. We highlight future directions to advance our understanding of endosymbiont persistence in fleas, as well as in other model systems, with extreme sex-differences in endosymbiont persistence. Insights from such studies are predicted to shed light on the evolution and ecology of arthropod-endosymbiont interactions in nature.
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Affiliation(s)
- Ron Flatau
- Mitrani Department of Desert Ecology, Swiss Institute for Dryland Environmental and Energy Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, Israel
| | - Michal Segoli
- Mitrani Department of Desert Ecology, Swiss Institute for Dryland Environmental and Energy Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, Israel
| | - Hadas Hawlena
- Mitrani Department of Desert Ecology, Swiss Institute for Dryland Environmental and Energy Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, Israel
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Li H, Li B, Lövei GL, Kring TJ, Obrycki JJ. Interactions Among Native and Non-Native Predatory Coccinellidae Influence Biological Control and Biodiversity. ANNALS OF THE ENTOMOLOGICAL SOCIETY OF AMERICA 2021; 114:119-136. [PMID: 33732410 PMCID: PMC7953206 DOI: 10.1093/aesa/saaa047] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Indexed: 05/05/2023]
Abstract
Over the past 30 yr, multiple species of predatory Coccinellidae, prominently Coccinella septempunctata L. and Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) have spread to new continents, influencing biodiversity and biological control. Here we review the mechanisms underlying these ecological interactions, focusing on multi-year field studies of native and non-native coccinellids and those using molecular and quantitative ecological methods. Field data from Asia show that H. axyridis, C. septempunctata, and Propylea japonica (Thunberg) (Coleoptera: Coccinellidae) are regularly among the most abundant predatory species but their rank varies by habitat. Studies of these species in their native Asian range, primarily related to their range in mainland China, document different patterns of seasonal abundance, species specific associations with prey, and habitat separation. Intraguild predation is well documented both in Asia and in newly invaded areas, and H. axyridis benefits most from this interaction. Harmonia axyridis also seems to rely more on cannibalism in times of prey scarcity than other species, and relatively sparse data indicate a lower predation pressure on it from natural enemies of coccinellids. Declines in the abundance of native coccinellids following the spread and increase of non-native species, documented in several multi-year studies on several continents, is a major concern for native biodiversity and the persistence of native coccinellid species. We suggest that future studies focus more attention on the community ecology of these invasive species in their native habitats.
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Affiliation(s)
- Hongran Li
- Department of Entomology, University of Kentucky, Lexington, KY, USA
- Department of Entomology, School of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Baoping Li
- Department of Entomology, School of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Gábor L Lövei
- Department of Agroecology, Aarhus University, Flakkebjerg Research Centre, Forsøgsvej 1, Slagelse, Denmark
| | - Timothy J Kring
- Department of Entomology, Virginia Tech, Blacksburg, VA, USA
| | - John J Obrycki
- Department of Entomology, University of Kentucky, Lexington, KY, USA
- Corresponding author, e-mail: john.
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10
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Semiatizki A, Weiss B, Bagim S, Rohkin-Shalom S, Kaltenpoth M, Chiel E. Effects, interactions, and localization of Rickettsia and Wolbachia in the house fly parasitoid, Spalangia endius. MICROBIAL ECOLOGY 2020; 80:718-728. [PMID: 32488484 DOI: 10.1007/s00248-020-01520-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
Many insect species harbor facultative microbial symbionts that affect their biology in diverse ways. Here, we studied the effects, interactions, and localization of two bacterial symbionts-Wolbachia and Rickettsia-in the parasitoid Spalangia endius. We crossed between four S. endius colonies-Wolbachia only (W), Rickettsia only (R), both (WR), and none (aposymbiotic, APS) (16 possible crosses) and found that Wolbachia induces incomplete cytoplasmic incompatibility (CI), both when the males are W or WR. Rickettsia did not cause reproductive manipulations and did not rescue the Wolbachia-induced CI. However, when R females were crossed with W or WR males, significantly less offspring were produced compared with that of control crosses. In non-CI crosses, the presence of Wolbachia in males caused a significant reduction in offspring numbers. Females' developmental time was significantly prolonged in the R colony, with adults starting to emerge one day later than the other colonies. Other fitness parameters did not differ significantly between the colonies. Using fluorescence in situ hybridization microscopy in females, we found that Wolbachia is localized alongside Rickettsia inside oocytes, follicle cells, and nurse cells in the ovaries. However, Rickettsia is distributed also in muscle cells all over the body, in ganglia, and even in the brain.
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Affiliation(s)
- Amit Semiatizki
- Department of Biology and Environment, University of Haifa-Oranim, 36006, Tivon, Israel
| | - Benjamin Weiss
- Department for Evolutionary Ecology, Institute of Organismic and Molecular Evolution, Johannes Gutenberg University, Mainz, Germany
| | - Shir Bagim
- Department of Biology and Environment, University of Haifa-Oranim, 36006, Tivon, Israel
| | - Sarit Rohkin-Shalom
- Department of Biology and Environment, University of Haifa-Oranim, 36006, Tivon, Israel
| | - Martin Kaltenpoth
- Department for Evolutionary Ecology, Institute of Organismic and Molecular Evolution, Johannes Gutenberg University, Mainz, Germany
| | - Elad Chiel
- Department of Biology and Environment, University of Haifa-Oranim, 36006, Tivon, Israel.
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11
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Kaczmarczyk-Ziemba A, Zagaja M, Wagner GK, Pietrykowska-Tudruj E, Staniec B. First Insight into Microbiome Profiles of Myrmecophilous Beetles and Their Host, Red Wood Ant Formica polyctena (Hymenoptera: Formicidae)-A Case Study. INSECTS 2020; 11:E134. [PMID: 32092972 PMCID: PMC7073670 DOI: 10.3390/insects11020134] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/10/2020] [Accepted: 02/17/2020] [Indexed: 01/23/2023]
Abstract
Formica polyctena belongs to the red wood ant species group. Its nests provide a stable, food rich, and temperature and humidity controlled environment, utilized by a wide range of species, called myrmecophiles. Here, we used the high-throughput sequencing of the 16S rRNA gene on the Illumina platform for identification of the microbiome profiles of six selected myrmecophilous beetles (Dendrophilus pygmaeus, Leptacinus formicetorum, Monotoma angusticollis, Myrmechixenus subterraneus, Ptenidium formicetorum and Thiasophila angulata) and their host F. polyctena. Analyzed bacterial communities consisted of a total of 23 phyla, among which Proteobacteria, Actinobacteria, and Firmicutes were the most abundant. Two known endosymbionts-Wolbachia and Rickettsia-were found in the analyzed microbiome profiles and Wolbachia was dominant in bacterial communities associated with F. polyctena, M. subterraneus, L. formicetorum and P. formicetorum (>90% of reads). In turn, M. angusticollis was co-infected with both Wolbachia and Rickettsia, while in the microbiome of T. angulata, the dominance of Rickettsia has been observed. The relationships among the microbiome profiles were complex, and no relative abundance pattern common to all myrmecophilous beetles tested was observed. However, some subtle, species-specific patterns have been observed for bacterial communities associated with D. pygmaeus, M. angusticollis, and T. angulata.
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Affiliation(s)
- Agnieszka Kaczmarczyk-Ziemba
- Department of Genetics and Biosystematics, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Mirosław Zagaja
- Isobolographic Analysis Laboratory, Institute of Rural Health, Jaczewskiego 2, 20-090 Lublin, Poland;
| | - Grzegorz K. Wagner
- Department of Zoology and Nature Protection, Maria Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland; (G.K.W.); (E.P.-T.); (B.S.)
| | - Ewa Pietrykowska-Tudruj
- Department of Zoology and Nature Protection, Maria Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland; (G.K.W.); (E.P.-T.); (B.S.)
| | - Bernard Staniec
- Department of Zoology and Nature Protection, Maria Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland; (G.K.W.); (E.P.-T.); (B.S.)
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12
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Magro A, Lecompte E, Hemptinne J, Soares AO, Dutrillaux A, Murienne J, Fürsch H, Dutrillaux B. First case of parthenogenesis in ladybirds (Coleoptera: Coccinellidae) suggests new mechanisms for the evolution of asexual reproduction. J ZOOL SYST EVOL RES 2020. [DOI: 10.1111/jzs.12339] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Alexandra Magro
- Laboratoire Evolution et Diversité biologique UMR EDB 5174 CNRS / UT3 / IRDToulouse France
- Ecole Nationale Supérieure de Formation de l'Enseignement Agricole Auzeville-Tolosane France
| | - Emilie Lecompte
- Laboratoire Evolution et Diversité biologique UMR EDB 5174 CNRS / UT3 / IRDToulouse France
- Université Toulouse III‐Paul Sabatier Toulouse France
| | - Jean‐Louis Hemptinne
- Laboratoire Evolution et Diversité biologique UMR EDB 5174 CNRS / UT3 / IRDToulouse France
- Ecole Nationale Supérieure de Formation de l'Enseignement Agricole Auzeville-Tolosane France
| | - Antonio O. Soares
- Centre for Ecology, Evolution and Environmental Changes Azorean Biodiversity Group University of the Azores Ponta Delgada, Azores Portugal
| | - Anne‐Marie Dutrillaux
- Institut de Systématique, Evolution, Biodiversité UMR ISYEB 7205 CNRS / MNHN / UPMC / EPHE Museum National d'Histoire Naturelle Paris France
| | - Jérôme Murienne
- Laboratoire Evolution et Diversité biologique UMR EDB 5174 CNRS / UT3 / IRDToulouse France
- Université Toulouse III‐Paul Sabatier Toulouse France
| | | | - Bernard Dutrillaux
- Institut de Systématique, Evolution, Biodiversité UMR ISYEB 7205 CNRS / MNHN / UPMC / EPHE Museum National d'Histoire Naturelle Paris France
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13
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Khamis FM, Mireji PO, Ombura FLO, Malacrida AR, Awuoche EO, Rono M, Mohamed SA, Tanga CM, Ekesi S. Species-specific transcriptional profiles of the gut and gut microbiome of Ceratitis quilicii and Ceratitis rosa sensu stricto. Sci Rep 2019; 9:18355. [PMID: 31798006 PMCID: PMC6892911 DOI: 10.1038/s41598-019-54989-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 11/19/2019] [Indexed: 12/27/2022] Open
Abstract
The fruit fly species, Ceratitis rosa sensu stricto and Ceratitis quilicii, are sibling species restricted to the lowland and highland regions, respectively. Until recently, these sibling species were considered as allopatric populations of C. rosa with distinct bionomics. We used deep Next Generation Sequencing (NGS) technology on intact guts of individuals from the two sibling species to compare their transcriptional profiles and simultaneously understand gut microbiome and host molecular processes and identify distinguishing genetic differences between the two species. Since the genomes of both species had not been published previously, the transcriptomes were assembled de novo into transcripts. Microbe-specific transcript orthologs were separated from the assembly by filtering searches of the transcripts against microbe databases using OrthoMCL. We then used differential expression analysis of host-specific transcripts (i.e. those remaining after the microbe-specific transcripts had been removed) and microbe-specific transcripts from the two-sibling species to identify defining species-specific transcripts that were present in only one fruit fly species or the other, but not in both. In C. quilicii females, bacterial transcripts of Pectobacterium spp., Enterobacterium buttiauxella, Enterobacter cloacae and Klebsiella variicola were upregulated compared to the C. rosa s.s. females. Comparison of expression levels of the host transcripts revealed a heavier investment by C. quilicii (compared with C. rosa s.s.) in: immunity; energy production; cell proliferation; insecticide resistance; reproduction and proliferation; and redox reactions that are usually associated with responses to stress and degradation of fruit metabolites.
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Affiliation(s)
- Fathiya M Khamis
- International Centre of Insect Physiology and Ecology, P.O. Box 30772-00100, Nairobi, Kenya.
| | - Paul O Mireji
- Biotechnology Research Institute, Kenya Agricultural and Livestock Research Organization, P.O. Box 362-00902, Kikuyu, Kenya.,Centre for Geographic Medicine Research Coast, Kenya Medical Research Institute, P.O. Box 428, Kilifi, Kenya
| | - Fidelis L O Ombura
- International Centre of Insect Physiology and Ecology, P.O. Box 30772-00100, Nairobi, Kenya
| | - Anna R Malacrida
- Department of Biology and Biotechnology, Universita degli Studi di Pavia, Corso Strada Nuova, 65, 27100, Pavia, Italy
| | - Erick O Awuoche
- Biotechnology Research Institute, Kenya Agricultural and Livestock Research Organization, P.O. Box 362-00902, Kikuyu, Kenya.,Department of Agriculture, School of Agriculture and Food Science, Meru University of Science and Technology, P.O. Box 972, Meru, Kenya
| | - Martin Rono
- Centre for Geographic Medicine Research Coast, Kenya Medical Research Institute, P.O. Box 428, Kilifi, Kenya
| | - Samira A Mohamed
- International Centre of Insect Physiology and Ecology, P.O. Box 30772-00100, Nairobi, Kenya
| | - Chrysantus M Tanga
- International Centre of Insect Physiology and Ecology, P.O. Box 30772-00100, Nairobi, Kenya
| | - Sunday Ekesi
- International Centre of Insect Physiology and Ecology, P.O. Box 30772-00100, Nairobi, Kenya
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14
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Guidetti R, Vecchi M, Ferrari A, Newton ILG, Cesari M, Rebecchi L. Further insights in the Tardigrada microbiome: phylogenetic position and prevalence of infection of four new Alphaproteobacteria putative endosymbionts. Zool J Linn Soc 2019. [DOI: 10.1093/zoolinnean/zlz128] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Abstract
Data from a previous study showed that microbiomes of six tardigrade species are species-specific and distinct from associated environmental microbes. We here performed a more in-depth analyses of those data, to identify and characterize new potential symbionts. The most abundant bacterial operational taxonomic units (OTUs) found in tardigrades are classified, and their prevalence in other environments is assessed using public databases. A subset of OTUs was selected for molecular phylogenetic analyses based on their affiliation with host-associated bacterial families in tardigrades. Almost 22.6% of the most abundant OTUs found do not match any sequence at 99% identity in the IMNGS database. These novel OTUs include four putative tardigrade endosymbionts from Alphaproteobacteria (Anaplasmataceae and Candidatus Tenuibacteraceae), which are characterized by 16S rRNA gene analysis and investigated for their infection rates in: Echiniscus trisetosus, Richtersisus coronifer and Macrobiotus macrocalix. These putative endosymbionts have an infection prevalence between 9.1% and 40.0%, and are, therefore, likely secondary symbionts, not essential for tardigrade survival and reproduction. Using fluorescence in situ hybridization (FISH), we detected bacteria on the cuticle and within the ovary of E. trisetosus, suggesting possible vertical transmission. This study highlights the great contribution in biodiversity discovery that neglected phyla can provide in microbiome and symbiosis studies.
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Affiliation(s)
- Roberto Guidetti
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Matteo Vecchi
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Department of Biological and Environmental Science, University of Jyvaskyla, University of Jyvaskyla, Finland
| | - Agnese Ferrari
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Michele Cesari
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Lorena Rebecchi
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
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15
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Zhang S, Luo J, Jiang W, Wu L, Zhang L, Ji J, Wang L, Ma Y, Cui J. Response of the bacterial community of Propylea japonica (Thunberg) to Cry2Ab protein. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 254:113063. [PMID: 31454585 DOI: 10.1016/j.envpol.2019.113063] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 08/04/2019] [Accepted: 08/14/2019] [Indexed: 06/10/2023]
Abstract
Propylea japonica is a very important predator in agricultural ecosystems, which could be exposed to Bt protein. In this study, the bacterial community of P. japonica fed with normal food and food containing Cry2Ab protein was characterized for the first time using qPCR and high-throughput sequencing approaches. Results showed no effect of Cry2Ab on P. japonica development and reproduction. The most abundant bacterial phylum was Firmicutes, and the most abundant genus was Staphylococcus. The total bacteria copy number was not significantly different across four larval stages. Bacteria species composition was gathered more closely in feed on sucrose solution (sucrose-fed) than in larvae only fed on pea aphid (aphid-fed), the diversity indices of some operational taxonomic unit (OTU) were significantly different between sucrose-fed and aphid-fed samples. Different instar larval stages of P. japonica fed with sucrose solution containing Cry2Ab Bt protein and found no effect on microbial community composition and total bacteria copy numbers. However, effects on relative abundance of microbes, copy numbers of Corynebacterium 1 and Glutamicibacter arilaitensis were observed significantly lower in Bt-fed first and fourth larval stages. Low and high concentrations of Cry2Ab protein altered the microbial abundance relative to sucrose-fed P. japonica and copy numbers of G. arilaitensis and Staphylococcus xylosus were significantly lower in Bt-fed samples than control sucrose-fed. Our results are the first report showing that feeding on Cry2Ab protein does not alter microbial species composition in P. japonica, but effects gene copy number of some dominant bacteria. Further investigations are needed to assess the effect of copy number change on P. japonica.
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Affiliation(s)
- Shuai Zhang
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou 450001, China; Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China
| | - Junyu Luo
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China
| | - Weili Jiang
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China
| | - Linke Wu
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China
| | - Lijuan Zhang
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China
| | - Jichao Ji
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China
| | - Li Wang
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China
| | - Yan Ma
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China
| | - Jinjie Cui
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou 450001, China; Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China.
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16
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Sazama EJ, Ouellette SP, Wesner JS. Bacterial Endosymbionts Are Common Among, but not Necessarily Within, Insect Species. ENVIRONMENTAL ENTOMOLOGY 2019; 48:127-133. [PMID: 30629155 DOI: 10.1093/ee/nvy188] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Indexed: 05/15/2023]
Abstract
Bacterial endosymbionts, particularly Wolbachia (Rickettsiales: Rickettsiaceae), Rickettsia (Rickettsiales: Rickettsiaceae), and Cardinium (Bacteroidales: Bacteroidaceae), are commonly found in several arthropod groups, including insects. Most estimates of the global infection rate of Wolbachia (52% [95% credible intervals: 44-60]) show that these bacteria infect more than half of all insect species. Other endosymbionts, such as Rickettsia (24% [confidence intervals [CIs] 20-42]) and Cardinium (13% [CIs 13-55]), infect a smaller but still substantial proportion of insect species. In spite of these observations, it is unclear what proportion of individuals within those species are infected. Here, we used published databases to estimate the proportion of individuals that are infected with either Wolbachia, Rickettsia, or Cardinium. We found that the majority (69%) of Wolbachia-infected species have less than half of their individuals infected with Wolbachia, indicating that although the bacterium may be common among species, it is not common within species. The same was true for Rickettsia (81%) and Cardinium (87%). This discrepancy was consistent across orders, in which less than 10% of individuals were typically infected, even though more than 50% of species within orders were infected. For example, according to our model, nearly 50% of beetle (Coleoptera) species are infected with Wolbachia (i.e., contain at least one individual that has tested positive for Wolbachia), but less than 5% of all individuals are infected. These results add to the growing knowledge base about endosymbionts in insects and should guide future sampling efforts and investigations on the role that these bacteria play in populations.
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Affiliation(s)
- Eric J Sazama
- Department of Biology, University of South Dakota, Vermillion, SD
| | - Scot P Ouellette
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Emile, Omaha, NE
| | - Jeff S Wesner
- Department of Biology, University of South Dakota, Vermillion, SD
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Phylogenetics of the Spiroplasma ixodetis endosymbiont reveals past transfers between ticks and other arthropods. Ticks Tick Borne Dis 2019; 10:575-584. [PMID: 30744948 DOI: 10.1016/j.ttbdis.2019.02.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 12/10/2018] [Accepted: 02/01/2019] [Indexed: 11/24/2022]
Abstract
The bacterium Spiroplasma ixodetis is a maternally inherited endosymbiont primarily described from ticks but also found widespread across other arthropods. While it has been identified as a male-killing agent in some insect species, the consequences of infection with S. ixodetis in ticks are entirely unknown, and it is unclear how this endosymbiont spreads across tick species. Here, we have investigated this aspect through the examination of the diversity and evolutionary history of S. ixodetis infections in 12 tick species and 12 other arthropod species. Using a multi-locus typing approach, we identified that ticks harbor a substantial diversity of divergent S. ixodetis strains. Phylogenetic investigations revealed that these S. ixodetis strains do not cluster within a tick-specific subclade but rather exhibit distinct evolutionary origins. In their past, these strains have undergone repeated horizontal transfers between ticks and other arthropods, including aphids and flies. This diversity pattern strongly suggests that maternal inheritance and horizontal transfers are key drivers of S. ixodetis spread, dictating global incidence of infections across tick communities. We do not, however, detect evidence of S. ixodetis-based male-killing since we observed that infections were widely present in both males and females across populations of the African blue tick Rhipicephalus decoloratus.
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Schebeck M, Feldkirchner L, Marín B, Krumböck S, Schuler H, Stauffer C. Reproductive Manipulators in the Bark Beetle Pityogenes chalcographus (Coleoptera: Curculionidae)-The Role of Cardinium, Rickettsia, Spiroplasma, and Wolbachia. JOURNAL OF INSECT SCIENCE (ONLINE) 2018; 18:4996250. [PMID: 29771340 PMCID: PMC5952938 DOI: 10.1093/jisesa/iey044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Indexed: 06/08/2023]
Abstract
Heritable bacterial endosymbionts can alter the biology of numerous arthropods. They can influence the reproductive outcome of infected hosts, thus affecting the ecology and evolution of various arthropod species. The spruce bark beetle Pityogenes chalcographus (L.) (Coleoptera: Curculionidae: Scolytinae) was reported to express partial, unidirectional crossing incompatibilities among certain European populations. Knowledge on the background of these findings is lacking; however, bacterial endosymbionts have been assumed to manipulate the reproduction of this beetle. Previous work reported low-density and low-frequency Wolbachia infections of P. chalcographus but found it unlikely that this infection results in reproductive alterations. The aim of this study was to test the hypothesis of an endosymbiont-driven incompatibility, other than Wolbachia, reflected by an infection pattern on a wide geographic scale. We performed a polymerase chain reaction (PCR) screening of 226 individuals from 18 European populations for the presence of the endosymbionts Cardinium, Rickettsia, and Spiroplasma, and additionally screened these individuals for Wolbachia. Positive PCR products were sequenced to characterize these bacteria. Our study shows a low prevalence of these four endosymbionts in P. chalcographus. We detected a yet undescribed Spiroplasma strain in a single individual from Greece. This is the first time that this endosymbiont has been found in a bark beetle. Further, Wolbachia was detected in three beetles from two Scandinavian populations and two new Wolbachia strains were described. None of the individuals analyzed were infected with Cardinium and Rickettsia. The low prevalence of bacteria found here does not support the hypothesis of an endosymbiont-driven reproductive incompatibility in P. chalcographus.
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Affiliation(s)
- Martin Schebeck
- Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, BOKU, Peter-Jordan-Straße, Vienna, Austria
| | - Lukas Feldkirchner
- Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, BOKU, Peter-Jordan-Straße, Vienna, Austria
| | - Belen Marín
- Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, BOKU, Peter-Jordan-Straße, Vienna, Austria
| | - Susanne Krumböck
- Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, BOKU, Peter-Jordan-Straße, Vienna, Austria
| | - Hannes Schuler
- Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, BOKU, Peter-Jordan-Straße, Vienna, Austria
| | - Christian Stauffer
- Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, BOKU, Peter-Jordan-Straße, Vienna, Austria
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19
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Kajtoch Ł, Kotásková N. Current state of knowledge on Wolbachia infection among Coleoptera: a systematic review. PeerJ 2018; 6:e4471. [PMID: 29568706 PMCID: PMC5846457 DOI: 10.7717/peerj.4471] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 02/17/2018] [Indexed: 11/20/2022] Open
Abstract
Background Despite great progress in studies on Wolbachia infection in insects, the knowledge about its relations with beetle species, populations and individuals, and the effects of bacteria on these hosts, is still unsatisfactory. In this review we summarize the current state of knowledge about Wolbachia occurrence and interactions with Coleopteran hosts. Methods An intensive search of the available literature resulted in the selection of 86 publications that describe the relevant details about Wolbachia presence among beetles. These publications were then examined with respect to the distribution and taxonomy of infected hosts and diversity of Wolbachia found in beetles. Sequences of Wolbachia genes (16S rDNA, ftsZ) were used for the phylogenetic analyses. Results The collected publications revealed that Wolbachia has been confirmed in 204 beetle species and that the estimated average prevalence of this bacteria across beetle species is 38.3% and varies greatly across families and genera (0–88% infected members) and is much lower (c. 13%) in geographic studies. The majority of the examined and infected beetles were from Europe and East Asia. The most intensively studied have been two groups of herbivorous beetles: Curculionidae and Chrysomelidae. Coleoptera harbor Wolbachia belonging to three supergroups: F found in only three species, and A and B found in similar numbers of beetles (including some doubly infected); however the latter two were most prevalent in different families. A total of 59% of species with precise data were found to be totally infected. Single infections were found in 69% of species and others were doubly- or multiply-infected. Wolbachia caused numerous effects on its beetle hosts, including selective sweep with host mtDNA (found in 3% of species), cytoplasmic incompatibility (detected in c. 6% of beetles) and other effects related to reproduction or development (like male-killing, possible parthenogenesis or haplodiploidy induction, and egg development). Phylogenetic reconstructions for Wolbachia genes rejected cospeciation between these bacteria and Coleoptera, with minor exceptions found in some Hydraenidae, Curculionidae and Chrysomelidae. In contrast, horizontal transmission of bacteria has been suspected or proven in numerous cases (e.g., among beetles sharing habitats and/or host plants). Discussion The present knowledge about Wolbachia infection across beetle species and populations is very uneven. Even the basic data about infection status in species and frequency of infected species across genera and families is very superficial, as only c. 0.15% of all beetle species have been tested so far. Future studies on Wolbachia diversity in Coleoptera should still be based on the Multi-locus Sequence Typing system, and next-generation sequencing technologies will be important for uncovering Wolbachia relations with host evolution and ecology, as well as with other, co-occurring endosymbiotic bacteria.
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Affiliation(s)
- Łukasz Kajtoch
- Institute of Systematics and Evolution of Animals Polish Academy of Sciences, Krakow, Poland
| | - Nela Kotásková
- Faculty of Science, University of Ostrava, Ostrava, Czech Republic
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Zug R, Hammerstein P. Evolution of reproductive parasites with direct fitness benefits. Heredity (Edinb) 2018; 120:266-281. [PMID: 29234159 PMCID: PMC5836592 DOI: 10.1038/s41437-017-0022-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 10/18/2017] [Accepted: 10/22/2017] [Indexed: 11/16/2022] Open
Abstract
Maternally inherited symbionts such as Wolbachia have long been seen mainly as reproductive parasites, with deleterious effects on host fitness. It is becoming clear, however, that, frequently, these symbionts also have beneficial effects on host fitness, either along with reproductive parasitism or not. Using the examples of cytoplasmic incompatibility (CI) and male-killing (MK), we here analyze the effect of direct fitness benefits on the evolution of reproductive parasites. By means of a simple theoretical framework, we synthesize and extend earlier modeling approaches for CI and MK, which usually ignore fitness benefits. Moreover, our framework is not restricted to a particular mechanism underlying the fitness benefit (e.g., protection against pathogens). We derive invasion conditions and equilibrium frequencies for the different infection scenarios. Our results demonstrate the importance of a symbiont's "effective fecundity" (i.e., the product of the relative fecundity of an infected female and her transmission efficiency) for a symbiont's invasion success. In particular, we adopt the concept of effective fecundity to scenarios where CI and MK co-occur in one host population. We confirm that direct fitness benefits substantially facilitate the invasion and spread of infections (for example, by lowering or removing the invasion threshold) or even make invasion possible in the first place (for example, if reproductive parasitism is weak or absent). Finally, we discuss the role of direct fitness benefits in long-term evolutionary dynamics of reproductive phenotypes and highlight their potential to resolve genetic conflicts between maternally inherited symbionts and their hosts.
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Affiliation(s)
- Roman Zug
- Institute for Theoretical Biology, Humboldt-Universität zu Berlin, Philippstr. 13, Haus 4, 10115, Berlin, Germany.
| | - Peter Hammerstein
- Institute for Theoretical Biology, Humboldt-Universität zu Berlin, Philippstr. 13, Haus 4, 10115, Berlin, Germany
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Tiede J, Scherber C, Mutschler J, McMahon KD, Gratton C. Gut microbiomes of mobile predators vary with landscape context and species identity. Ecol Evol 2017; 7:8545-8557. [PMID: 29075470 PMCID: PMC5648672 DOI: 10.1002/ece3.3390] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 07/19/2017] [Accepted: 07/26/2017] [Indexed: 01/01/2023] Open
Abstract
Landscape context affects predator–prey interactions and predator diet composition, yet little is known about landscape effects on insect gut microbiomes, a determinant of physiology and condition. Here, we combine laboratory and field experiments to examine the effects of landscape context on the gut bacterial community and body condition of predatory insects. Under laboratory conditions, we found that prey diversity increased bacterial richness in insect guts. In the field, we studied the performance and gut microbiota of six predatory insect species along a landscape complexity gradient in two local habitat types (soybean fields vs. prairie). Insects from soy fields had richer gut bacteria and lower fat content than those from prairies, suggesting better feeding conditions in prairies. Species origin mediated landscape context effects, suggesting differences in foraging of exotic and native predators on a landscape scale. Overall, our study highlights complex interactions among gut microbiota, predator identity, and landscape context.
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Affiliation(s)
- Julia Tiede
- Institute of Landscape Ecology University of Muenster Muenster Germany.,Department of Crop Sciences University of Goettingen Goettingen Germany.,Department of Entomology University of Wisconsin-Madison Madison WI USA
| | - Christoph Scherber
- Institute of Landscape Ecology University of Muenster Muenster Germany.,Department of Crop Sciences University of Goettingen Goettingen Germany
| | - James Mutschler
- Departments of Civil and Environmental Engineering and Bacteriology University of Wisconsin-Madison Madison WI USA
| | - Katherine D McMahon
- Departments of Civil and Environmental Engineering and Bacteriology University of Wisconsin-Madison Madison WI USA
| | - Claudio Gratton
- Department of Entomology University of Wisconsin-Madison Madison WI USA
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22
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Gerth M, Wolf R, Bleidorn C, Richter J, Sontowski R, Unrein J, Schlegel M, Gruppe A. Green lacewings (Neuroptera: Chrysopidae) are commonly associated with a diversity of rickettsial endosymbionts. ZOOLOGICAL LETTERS 2017; 3:12. [PMID: 28815055 PMCID: PMC5557424 DOI: 10.1186/s40851-017-0072-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 08/07/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Bacterial symbionts transmitted from mothers to offspring are found in the majority of arthropods. Numerous studies have illustrated their wide impact on host biology, such as reproduction, behavior, and physiology One of the most common inherited symbionts is Rickettsia spp. (Alphaproteobacteria, Rickettsiales), which are found in about one-quarter of terrestrial arthropods, as well as in other invertebrates. In insect populations, Rickettsia spp. have been reported to cause reproductive modifications and fecundity-enhancing effects. Here, we investigated the incidence and genetic diversity of Rickettsia symbionts in green lacewings (Neuroptera, Chrysopidae), which are best known for their use as biological control agents against crop pests. RESULTS We screened 18 species of green lacewings and allies for Rickettsia and found the symbiont in 10 species, infecting 20-100% of sampled individuals. Strain characterization based on multiple bacterial loci revealed an unprecedented diversity of Rickettsia associated with lacewings, suggesting multiple independent acquisitions. Further, the detected Rickettsia lineages are restricted to a specific lineage (i.e., species or genus) of investigated lacewings, and these associations are stable across multiple sampled locations and points in time. CONCLUSIONS We conclude that Rickettsia-lacewing symbioses are common and evolutionarily stable. The role of these symbionts remains to be identified, but is potentially important to optimizing their use in biological pest control.
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Affiliation(s)
- Michael Gerth
- Institute of Integrative Biology, University of Liverpool, Biosciences Building, Crown Street, L69 7ZB, Liverpool, UK
| | - Ronny Wolf
- Institute for Biology, Molecular Evolution & Systematics of Animals, University of Leipzig, Talstrasse 33, 04103 Leipzig, Germany
| | - Christoph Bleidorn
- Museo Nacional de Ciencias Naturales, Spanish National Research Council (CSIC), Madrid, Spain
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany
| | - Julia Richter
- Institute for Biology, Molecular Evolution & Systematics of Animals, University of Leipzig, Talstrasse 33, 04103 Leipzig, Germany
| | - Rebekka Sontowski
- Institute for Biology, Molecular Evolution & Systematics of Animals, University of Leipzig, Talstrasse 33, 04103 Leipzig, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany
| | - Jasmin Unrein
- Institute for Biology, Molecular Evolution & Systematics of Animals, University of Leipzig, Talstrasse 33, 04103 Leipzig, Germany
| | - Martin Schlegel
- Institute for Biology, Molecular Evolution & Systematics of Animals, University of Leipzig, Talstrasse 33, 04103 Leipzig, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany
| | - Axel Gruppe
- Chair of Zoology - Entomology, Technical University of Munich, Hans-Carl-von-Carlowitz-Platz 2, 85354 Freising, Germany
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23
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Murray RL, Herridge EJ, Ness RW, Bussière LF. Are sex ratio distorting endosymbionts responsible for mating system variation among dance flies (Diptera: Empidinae)? PLoS One 2017; 12:e0178364. [PMID: 28609446 PMCID: PMC5469461 DOI: 10.1371/journal.pone.0178364] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 05/11/2017] [Indexed: 11/24/2022] Open
Abstract
Maternally inherited bacterial endosymbionts are common in many arthropod species. Some endosymbionts cause female-biased sex ratio distortion in their hosts that can result in profound changes to a host’s mating behaviour and reproductive biology. Dance flies (Diptera: Empidinae) are well known for their unusual reproductive biology, including species with female-specific ornamentation and female-biased lek-like swarming behaviour. The cause of the repeated evolution of female ornaments in these flies remains unknown, but is probably associated with female-biased sex ratios in individual species. In this study we assessed whether dance flies harbour sex ratio distorting endosymbionts that might have driven these mating system evolutionary changes. We measured the incidence and prevalence of infection by three endosymbionts that are known to cause female-biased sex ratios in other insect hosts (Wolbachia, Rickettsia and Spiroplasma) across 20 species of dance flies. We found evidence of widespread infection by all three symbionts and variation in sex-specific prevalence across the taxa sampled. However, there was no relationship between infection prevalence and adult sex ratio measures and no evidence that female ornaments are associated with high prevalences of sex-biased symbiont infections. We conclude that the current distribution of endosymbiont infections is unlikely to explain the diversity in mating systems among dance fly species.
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Affiliation(s)
- Rosalind L. Murray
- Department of Biology, University of Toronto Mississauga, Mississauga, ON, Canada
- Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
- Biological and Environmental Sciences, University of Stirling, Stirling, United Kingdom
- * E-mail:
| | - Elizabeth J. Herridge
- Biological and Environmental Sciences, University of Stirling, Stirling, United Kingdom
| | - Rob W. Ness
- Department of Biology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Luc F. Bussière
- Biological and Environmental Sciences, University of Stirling, Stirling, United Kingdom
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Bonnet SI, Binetruy F, Hernández-Jarguín AM, Duron O. The Tick Microbiome: Why Non-pathogenic Microorganisms Matter in Tick Biology and Pathogen Transmission. Front Cell Infect Microbiol 2017. [PMID: 28642842 PMCID: PMC5462901 DOI: 10.3389/fcimb.2017.00236] [Citation(s) in RCA: 212] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Ticks are among the most important vectors of pathogens affecting humans and other animals worldwide. They do not only carry pathogens however, as a diverse group of commensal and symbiotic microorganisms are also present in ticks. Unlike pathogens, their biology and their effect on ticks remain largely unexplored, and are in fact often neglected. Nonetheless, they can confer multiple detrimental, neutral, or beneficial effects to their tick hosts, and can play various roles in fitness, nutritional adaptation, development, reproduction, defense against environmental stress, and immunity. Non-pathogenic microorganisms may also play a role in driving transmission of tick-borne pathogens (TBP), with many potential implications for both human and animal health. In addition, the genetic proximity of some pathogens to mutualistic symbionts hosted by ticks is evident when studying phylogenies of several bacterial genera. The best examples are found within members of the Rickettsia, Francisella, and Coxiella genera: while in medical and veterinary research these bacteria are traditionally recognized as highly virulent vertebrate pathogens, it is now clear to evolutionary ecologists that many (if not most) Coxiella, Francisella, and Rickettsia bacteria are actually non-pathogenic microorganisms exhibiting alternative lifestyles as mutualistic ticks symbionts. Consequently, ticks represent a compelling yet challenging system in which to study microbiomes and microbial interactions, and to investigate the composition, functional, and ecological implications of bacterial communities. Ultimately, deciphering the relationships between tick microorganisms as well as tick symbiont interactions will garner invaluable information, which may aid in the future development of arthropod pest and vector-borne pathogen transmission control strategies.
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Affiliation(s)
| | - Florian Binetruy
- Laboratoire MIVEGEC (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), Centre National de la Recherche Scientifique (UMR5290), IRD (UMR224), Université de MontpellierMontpellier, France
| | | | - Olivier Duron
- Laboratoire MIVEGEC (Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle), Centre National de la Recherche Scientifique (UMR5290), IRD (UMR224), Université de MontpellierMontpellier, France
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25
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Duron O, Binetruy F, Noël V, Cremaschi J, McCoy KD, Arnathau C, Plantard O, Goolsby J, Pérez de León AA, Heylen DJA, Van Oosten AR, Gottlieb Y, Baneth G, Guglielmone AA, Estrada‐Peña A, Opara MN, Zenner L, Vavre F, Chevillon C. Evolutionary changes in symbiont community structure in ticks. Mol Ecol 2017; 26:2905-2921. [DOI: 10.1111/mec.14094] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 02/07/2017] [Accepted: 02/13/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Olivier Duron
- Laboratoire MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle) Centre National de la Recherche Scientifique (UMR5290) – Institut pour la Recherche et le Développement (UR224) – Université de Montpellier Montpellier France
| | - Florian Binetruy
- Laboratoire MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle) Centre National de la Recherche Scientifique (UMR5290) – Institut pour la Recherche et le Développement (UR224) – Université de Montpellier Montpellier France
| | - Valérie Noël
- Laboratoire MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle) Centre National de la Recherche Scientifique (UMR5290) – Institut pour la Recherche et le Développement (UR224) – Université de Montpellier Montpellier France
| | - Julie Cremaschi
- Laboratoire MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle) Centre National de la Recherche Scientifique (UMR5290) – Institut pour la Recherche et le Développement (UR224) – Université de Montpellier Montpellier France
| | - Karen D. McCoy
- Laboratoire MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle) Centre National de la Recherche Scientifique (UMR5290) – Institut pour la Recherche et le Développement (UR224) – Université de Montpellier Montpellier France
| | - Céline Arnathau
- Laboratoire MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle) Centre National de la Recherche Scientifique (UMR5290) – Institut pour la Recherche et le Développement (UR224) – Université de Montpellier Montpellier France
| | | | - John Goolsby
- Cattle Fever Tick Research Laboratory USDA‐ARS Edinburg TX USA
| | - Adalberto A. Pérez de León
- Knipling‐Bushland U.S. Livestock Insects Research Laboratory Veterinary Pest Genomics Center Kerrville TX USA
| | - Dieter J. A. Heylen
- Evolutionary Ecology Group University of Antwerp Universiteitsplein 1 Antwerp Belgium
| | - A. Raoul Van Oosten
- Evolutionary Ecology Group University of Antwerp Universiteitsplein 1 Antwerp Belgium
| | - Yuval Gottlieb
- Koret School of Veterinary Medicine The Hebrew University of Jerusalem Rehovot Israel
| | - Gad Baneth
- Koret School of Veterinary Medicine The Hebrew University of Jerusalem Rehovot Israel
| | - Alberto A. Guglielmone
- Instituto Nacional de Tecnología Agropecuaria Estación Experimental Agropecuaria Rafaela and Consejo Nacional de Investigaciones Científicas y Técnicas Santa Fe Argentina
| | - Agustin Estrada‐Peña
- Department of Animal Pathology Faculty of Veterinary Medicine University of Zaragoza Zaragoza Spain
| | - Maxwell N. Opara
- Ticks and Tick‐borne Pathogens Research Unit (TTbPRU) Department of Veterinary Parasitology and Entomology University of Abuja Abuja Nigeria
| | - Lionel Zenner
- Laboratoire de Biométrie et Biologie Évolutive (LBBE) Centre National de la Recherche Scientifique (UMR5558) – Université Claude Bernard Lyon 1 Villeurbanne France
| | - Fabrice Vavre
- Laboratoire de Biométrie et Biologie Évolutive (LBBE) Centre National de la Recherche Scientifique (UMR5558) – Université Claude Bernard Lyon 1 Villeurbanne France
| | - Christine Chevillon
- Laboratoire MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle) Centre National de la Recherche Scientifique (UMR5290) – Institut pour la Recherche et le Développement (UR224) – Université de Montpellier Montpellier France
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Dumas E, Atyame CM, Malcolm CA, Le Goff G, Unal S, Makoundou P, Pasteur N, Weill M, Duron O. Molecular data reveal a cryptic species within the Culex pipiens mosquito complex. INSECT MOLECULAR BIOLOGY 2016; 25:800-809. [PMID: 27591564 DOI: 10.1111/imb.12264] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The Culex pipiens mosquito complex is a group of evolutionarily closely related species including C. pipiens and Culex quinquefasciatus, both infected by the cytoplasmically inherited Wolbachia symbiont. A Wolbachia-uninfected population of C. pipiens was however described in South Africa and was recently proposed to represent a cryptic species. In this study, we reconsidered the existence of this species by undertaking an extensive screening for the presence of Wolbachia-uninfected C. pipiens specimens and by characterizing their genetic relatedness with known members of the complex. We first report on the presence of Wolbachia-uninfected specimens in several breeding sites. We next confirm that these uninfected specimens unambiguously belong to the C. pipiens complex. Remarkably, all uninfected specimens harbour mitochondrial haplotypes that are either novel or identical to those previously found in South Africa. In all cases, these mitochondrial haplotypes are closely related, but different, to those found in other C. pipiens complex members known to be infected by Wolbachia. Altogether, these results corroborate the presence of a widespread cryptic species within the C. pipiens species complex. The potential role of this cryptic C. pipiens species in the transmission of pathogens remains however to be determined. The designation 'Culex juppi nov. sp.' is proposed for this mosquito species.
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Affiliation(s)
- E Dumas
- Institut des Sciences de l'Evolution, Univ. Montpellier, CNRS, Montpellier, France
| | - C M Atyame
- Institut des Sciences de l'Evolution, Univ. Montpellier, CNRS, Montpellier, France
- Department of Virology, Institut Pasteur, Arboviruses and Insect Vectors, Paris, France
| | - C A Malcolm
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Hertfordshire, UK
| | - G Le Goff
- UMR MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle), IRD 224, CNRS 5290, Univ. Montpellier, Montpellier, France
| | - S Unal
- Institut des Sciences de l'Evolution, Univ. Montpellier, CNRS, Montpellier, France
| | - P Makoundou
- Institut des Sciences de l'Evolution, Univ. Montpellier, CNRS, Montpellier, France
| | - N Pasteur
- Institut des Sciences de l'Evolution, Univ. Montpellier, CNRS, Montpellier, France
| | - M Weill
- Institut des Sciences de l'Evolution, Univ. Montpellier, CNRS, Montpellier, France
| | - O Duron
- Institut des Sciences de l'Evolution, Univ. Montpellier, CNRS, Montpellier, France
- UMR MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle), IRD 224, CNRS 5290, Univ. Montpellier, Montpellier, France
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27
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Heritable bacterial endosymbionts in native and invasive populations of Harmonia axyridis. Biol Invasions 2016. [DOI: 10.1007/s10530-016-1298-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Weiss B, Kaltenpoth M. Bacteriome-Localized Intracellular Symbionts in Pollen-Feeding Beetles of the Genus Dasytes (Coleoptera, Dasytidae). Front Microbiol 2016; 7:1486. [PMID: 27713733 PMCID: PMC5031591 DOI: 10.3389/fmicb.2016.01486] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 09/07/2016] [Indexed: 01/28/2023] Open
Abstract
Several insect taxa are associated with intracellular symbionts that provision limiting nutrients to their hosts. Such tightly integrated symbioses are especially common in insects feeding on nutritionally challenging diets like phloem sap or vertebrate blood, but also occur in seed-eating and omnivorous taxa. Here, we characterize an intracellular symbiosis in pollen-feeding beetles of the genus Dasytes (Coleoptera, Dasytidae). High-throughput tag-encoded 16S amplicon pyrosequencing of adult D. plumbeus and D. virens revealed a single gamma-proteobacterial symbiont ('Candidatus Dasytiphilus stammeri') that amounts to 52.4-98.7% of the adult beetles' entire microbial community. Almost complete 16S rRNA sequences phylogenetically placed the symbiont into a clade comprising Buchnera and other insect endosymbionts, but sequence similarities to these closest relatives were surprisingly low (83.4-87.4%). Using histological examination, three-dimensional reconstructions, and fluorescence in situ hybridization, we localized the symbionts in three mulberry-shaped bacteriomes that are associated with the mid- to hind-gut transition in adult male and female beetles. Given the specialized pollen-feeding habits of the adults that contrasts with the larvae's carnivorous lifestyle, the symbionts may provision limiting essential amino acids or vitamins as in other intracellular symbioses, or they might produce digestive enzymes that break up the fastidious pollen walls and thereby contribute to the host's nutrition. In either case, the presence of gamma-proteobacterial symbionts in pollen-feeding beetles indicates that intracellular mutualists are more widely distributed across insects with diverse feeding habits than previously recognized.
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Affiliation(s)
- Benjamin Weiss
- Insect Symbiosis Research Group, Max Planck Institute for Chemical EcologyJena, Germany
- Department for Evolutionary Ecology, Institute for Zoology, Johannes Gutenberg University of MainzMainz, Germany
| | - Martin Kaltenpoth
- Insect Symbiosis Research Group, Max Planck Institute for Chemical EcologyJena, Germany
- Department for Evolutionary Ecology, Institute for Zoology, Johannes Gutenberg University of MainzMainz, Germany
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29
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Hahn MA, Dheilly NM. Experimental Models to Study the Role of Microbes in Host-Parasite Interactions. Front Microbiol 2016; 7:1300. [PMID: 27602023 PMCID: PMC4993751 DOI: 10.3389/fmicb.2016.01300] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 08/08/2016] [Indexed: 01/09/2023] Open
Abstract
Until recently, parasitic infections have been primarily studied as interactions between the parasite and the host, leaving out crucial players: microbes. The recent realization that microbes play key roles in the biology of all living organisms is not only challenging our understanding of host-parasite evolution, but it also provides new clues to develop new therapies and remediation strategies. In this paper we provide a review of promising and advanced experimental organismal systems to examine the dynamic of host-parasite-microbe interactions. We address the benefits of developing new experimental models appropriate to this new research area and identify systems that offer the best promises considering the nature of the interactions among hosts, parasites, and microbes. Based on these systems, we identify key criteria for selecting experimental models to elucidate the fundamental principles of these complex webs of interactions. It appears that no model is ideal and that complementary studies should be performed on different systems in order to understand the driving roles of microbes in host and parasite evolution.
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Affiliation(s)
- Megan A Hahn
- School of Marine and Atmospheric Sciences, Stony Brook University Stony Brook, NY, USA
| | - Nolwenn M Dheilly
- School of Marine and Atmospheric Sciences, Stony Brook University Stony Brook, NY, USA
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30
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Vanthournout B, Hendrickx F. Hidden suppression of sex ratio distortion suggests Red queen dynamics between Wolbachia and its dwarf spider host. J Evol Biol 2016; 29:1488-94. [PMID: 26995349 DOI: 10.1111/jeb.12861] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 02/05/2016] [Accepted: 02/26/2016] [Indexed: 01/13/2023]
Abstract
Genetic conflict theory predicts strong selection for host nuclear factors suppressing endosymbiont effects on reproduction; however, evidence of these suppressors is currently scarce. This can either be caused by a low suppressor evolution rate, or if suppressors originate frequently, by rapid spread and concurrent masking of their activity by silencing the endosymbiont effect. To explore this, we use two populations of a dwarf spider with a similar female bias, caused by a Wolbachia infection. Using inter- and intrapopulation crosses, we determine that one of these populations demonstrates a higher suppressing capability towards Wolbachia despite having a similar population sex ratio. This suggests that spider and endosymbiont are locked in so-called red queen dynamics where, despite continuous coevolution, average fitness remains the same, hence hiding the presence of the suppressor. Finding different suppressor activity in populations that even lack phenotypic differentiation (i.e. similar sex ratio) further supports the hypothesis that suppressors originate often, but are often hidden by their own mode of action by countering endosymbiont effects.
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Affiliation(s)
- B Vanthournout
- Terrestrial Ecology Unit, Department of Biology, Ghent University, Ghent, Belgium.,Department of Bioscience, Aarhus University, Aarhus C, Denmark
| | - F Hendrickx
- Terrestrial Ecology Unit, Department of Biology, Ghent University, Ghent, Belgium.,Royal Belgian Institute of Natural Sciences, Brussels, Belgium
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31
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Weinert LA, Araujo-Jnr EV, Ahmed MZ, Welch JJ. The incidence of bacterial endosymbionts in terrestrial arthropods. Proc Biol Sci 2016; 282:20150249. [PMID: 25904667 DOI: 10.1098/rspb.2015.0249] [Citation(s) in RCA: 291] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Intracellular endosymbiotic bacteria are found in many terrestrial arthropods and have a profound influence on host biology. A basic question about these symbionts is why they infect the hosts that they do, but estimating symbiont incidence (the proportion of potential host species that are actually infected) is complicated by dynamic or low prevalence infections. We develop a maximum-likelihood approach to estimating incidence, and testing hypotheses about its variation. We apply our method to a database of screens for bacterial symbionts, containing more than 3600 distinct arthropod species and more than 150 000 individual arthropods. After accounting for sampling bias, we estimate that 52% (CIs: 48-57) of arthropod species are infected with Wolbachia, 24% (CIs: 20-42) with Rickettsia and 13% (CIs: 13-55) with Cardinium. We then show that these differences stem from the significantly reduced incidence of Rickettsia and Cardinium in most hexapod orders, which might be explained by evolutionary differences in the arthropod immune response. Finally, we test the prediction that symbiont incidence should be higher in speciose host clades. But while some groups do show a trend for more infection in species-rich families, the correlations are generally weak and inconsistent. These results argue against a major role for parasitic symbionts in driving arthropod diversification.
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Affiliation(s)
- Lucy A Weinert
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge, UK
| | - Eli V Araujo-Jnr
- Department of Genetics, University of Cambridge, Downing Street, Cambridge, UK
| | - Muhammad Z Ahmed
- University of Florida, Institute of Food and Agricultural Sciences, Tropical Research and Education Center, 18905 SW 280th Street, Homestead, FL 33031, USA
| | - John J Welch
- Department of Genetics, University of Cambridge, Downing Street, Cambridge, UK
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32
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Sontowski R, Bernhard D, Bleidorn C, Schlegel M, Gerth M. Wolbachia distribution in selected beetle taxa characterized by PCR screens and MLST data. Ecol Evol 2015; 5:4345-53. [PMID: 26664683 PMCID: PMC4667820 DOI: 10.1002/ece3.1641] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 07/03/2015] [Accepted: 07/08/2015] [Indexed: 11/17/2022] Open
Abstract
Wolbachia (Alphaproteobacteria) is an inherited endosymbiont of arthropods and filarial nematodes and was reported to be widespread across insect taxa. While Wolbachia's effects on host biology are not understood from most of these hosts, known Wolbachia‐induced phenotypes cover a spectrum from obligate beneficial mutualism to reproductive manipulations and pathogenicity. Interestingly, data on Wolbachia within the most species‐rich order of arthropods, the Coleoptera (beetles), are scarce. Therefore, we screened 128 species from seven beetle families (Buprestidae, Hydraenidae, Dytiscidae, Hydrophilidae, Gyrinidae, Haliplidae, and Noteridae) for the presence of Wolbachia. Our data show that, contrary to previous estimations, Wolbachia frequencies in beetles (31% overall) are comparable to the ones in other insects. In addition, we used Wolbachia MLST data and host phylogeny to explore the evolutionary history of Wolbachia strains from Hydraenidae, an aquatic lineage of beetles. Our data suggest that Wolbachia from Hydraenidae might be largely host genus specific and that Wolbachia strain phylogeny is not independent to that of its hosts. As this contrasts with most terrestrial Wolbachia–arthropod systems, one potential conclusion is that aquatic lifestyle of hosts may result in Wolbachia distribution patterns distinct from those of terrestrial hosts. Our data thus provide both insights into Wolbachia distribution among beetles in general and a first glimpse of Wolbachia distribution patterns among aquatic host lineages.
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Affiliation(s)
- Rebekka Sontowski
- Molecular Evolution and Systematics of Animals Institute for Biology University of Leipzig Talstrasse 33 D-04103 Leipzig Germany
| | - Detlef Bernhard
- Molecular Evolution and Systematics of Animals Institute for Biology University of Leipzig Talstrasse 33 D-04103 Leipzig Germany
| | - Christoph Bleidorn
- Molecular Evolution and Systematics of Animals Institute for Biology University of Leipzig Talstrasse 33 D-04103 Leipzig Germany ; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig Deutscher Platz 5d 04103 Leipzig Germany
| | - Martin Schlegel
- Molecular Evolution and Systematics of Animals Institute for Biology University of Leipzig Talstrasse 33 D-04103 Leipzig Germany ; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig Deutscher Platz 5d 04103 Leipzig Germany
| | - Michael Gerth
- Molecular Evolution and Systematics of Animals Institute for Biology University of Leipzig Talstrasse 33 D-04103 Leipzig Germany
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33
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Douglas HD, Malenke JR. An Extraordinary Host-Specific Sex Ratio in an Avian Louse (Phthiraptera: Insecta)--Chemical Distortion? ENVIRONMENTAL ENTOMOLOGY 2015; 44:1149-1154. [PMID: 26314060 DOI: 10.1093/ee/nvv073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 04/20/2015] [Indexed: 06/04/2023]
Abstract
Distortions of sex ratios and sexual traits from synthetic chemicals have been well documented; however, there is little evidence for such phenomena associated with naturally occurring chemical exposures. We reasoned that chemical secretions of vertebrates could contribute to skewed sex ratios in ectoparasitic insects due to differences in susceptibility among the sexes. For example, among ectoparasitic lice the female is generally the larger sex. Smaller males may be more susceptible to chemical effects. We studied sex ratios of lice on two sympatric species of colonial seabirds. Crested auklets (Aethia cristatella) secrete a strong smelling citrus-like odorant composed of aldehydes while a closely related congener the least auklet (Aethia pusilla) lacks these compounds. Each auklet hosts three species of lice, two of which are shared in common. We found that the sex ratio of one louse species, Quadraceps aethereus (Giebel), was highly skewed on crested auklets 1:69 (males: females), yet close to unity on least auklets (1:0.97). We suggest that a host-specific effect contributes to this difference, such as the crested auklet's chemical odorant.
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Affiliation(s)
- H D Douglas
- Institute of Marine Science, University of Alaska, Fairbanks, AK 99775. Current address: Science Department, College of Rural and Community Development, Kuskokwim Campus, University of Alaska, Bethel, AK 99559.
| | - J R Malenke
- Department of Biology, University of Utah, Salt Lake City, UT 84412
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34
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Paula DP, Linard B, Andow DA, Sujii ER, Pires CSS, Vogler AP. Detection and decay rates of prey and prey symbionts in the gut of a predator through metagenomics. Mol Ecol Resour 2015; 15:880-92. [PMID: 25545417 DOI: 10.1111/1755-0998.12364] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 12/15/2014] [Accepted: 12/18/2014] [Indexed: 12/15/2022]
Abstract
DNA methods are useful to identify ingested prey items from the gut of predators, but reliable detection is hampered by low amounts of degraded DNA. PCR-based methods can retrieve minute amounts of starting material but suffer from amplification biases and cross-reactions with the predator and related species genomes. Here, we use PCR-free direct shotgun sequencing of total DNA isolated from the gut of the harlequin ladybird Harmonia axyridis at five time points after feeding on a single pea aphid Acyrthosiphon pisum. Sequence reads were matched to three reference databases: Insecta mitogenomes of 587 species, including H. axyridis sequenced here; A. pisum nuclear genome scaffolds; and scaffolds and complete genomes of 13 potential bacterial symbionts. Immediately after feeding, multicopy mtDNA of A. pisum was detected in tens of reads, while hundreds of matches to nuclear scaffolds were detected. Aphid nuclear DNA and mtDNA decayed at similar rates (0.281 and 0.11 h(-1) respectively), and the detectability periods were 32.7 and 23.1 h. Metagenomic sequencing also revealed thousands of reads of the obligate Buchnera aphidicola and facultative Regiella insecticola aphid symbionts, which showed exponential decay rates significantly faster than aphid DNA (0.694 and 0.80 h(-1) , respectively). However, the facultative aphid symbionts Hamiltonella defensa, Arsenophonus spp. and Serratia symbiotica showed an unexpected temporary increase in population size by 1-2 orders of magnitude in the predator guts before declining. Metagenomics is a powerful tool that can reveal complex relationships and the dynamics of interactions among predators, prey and their symbionts.
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Affiliation(s)
- Débora P Paula
- Embrapa Genetic Resources and Biotechnology, Parque Estação Biológica, W5 Norte, P.O. Box 02372, Brasília, DF, 70770-917, Brazil.,Department of Life Sciences, Natural History Museum, Cromwell Rd, London, SW7 5BD, UK
| | - Benjamin Linard
- Department of Life Sciences, Natural History Museum, Cromwell Rd, London, SW7 5BD, UK
| | - David A Andow
- Department of Entomology, University of Minnesota, 219 Hodson Hall, 1980 Folwell Ave., St. Paul, MN, 55108, USA
| | - Edison R Sujii
- Embrapa Genetic Resources and Biotechnology, Parque Estação Biológica, W5 Norte, P.O. Box 02372, Brasília, DF, 70770-917, Brazil
| | - Carmen S S Pires
- Embrapa Genetic Resources and Biotechnology, Parque Estação Biológica, W5 Norte, P.O. Box 02372, Brasília, DF, 70770-917, Brazil
| | - Alfried P Vogler
- Department of Life Sciences, Natural History Museum, Cromwell Rd, London, SW7 5BD, UK.,Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, SL7 5PY, UK
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35
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Elnagdy S, Messing S, Majerus MEN. The Japanese ladybirds, Coccinula crotchi and Coccinula sinensis, are infected with very closely related strains of male-killing Flavobacterium. INSECT SCIENCE 2014; 21:699-706. [PMID: 24124002 DOI: 10.1111/1744-7917.12062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/20/2013] [Indexed: 06/02/2023]
Abstract
Male-killing is 1 of 4 known strategies that inherited parasitic endosymbionts have evolved to manipulate their host's reproduction. In early male-killing, infected male offspring are killed early in embryogenesis. Within the Insecta, male-killing bacteria have been found in a wide range of hosts. The Coccinellidae families of beetles, better known as ladybirds, are particularly prone to male-killer invasion. In samples of the coccinellid, Coccinula crotchi, from Japan, a new male-killing bacterium was revealed by phenotypic assay. Molecular genetic analysis revealed the identity to be a tetracycline-sensitive Flavobacterium that causes female-biased offspring sex ratio. Furthermore, that Flavobacterium strain was found to be closely related to the Flavobacterium causing male-killing in the congeneric Japanese coccinellid, Coccinula sinensis, which was collected from the same region. However, we found slightly different Flavobacterium strains infecting C. sinensis from regions with different environmental conditions. This may be an indication of horizontal transmission of male-killing Flavobacterium between these 2 ladybird spices. Finally, environmental conditions may affect the spread of male-killing bacteria among their hosts.
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Affiliation(s)
- Sherif Elnagdy
- Department of Genetics, University of Cambridge, Downing Street, Cambridge, CB2 3EH, UK; Botany Department, Faculty of Science, Cairo University, Giza, Egypt
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36
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Duron O. Arsenophonus insect symbionts are commonly infected with APSE, a bacteriophage involved in protective symbiosis. FEMS Microbiol Ecol 2014; 90:184-94. [PMID: 25041857 DOI: 10.1111/1574-6941.12381] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 07/08/2014] [Accepted: 07/09/2014] [Indexed: 11/29/2022] Open
Abstract
Insects commonly have intimate associations with maternally inherited bacterial symbionts. While many inherited symbionts are not essential for host survival, they often act as conditional mutualists, conferring protection against certain environmental stresses. The defensive symbiont Hamiltonella defensa which protects aphids against attacks by parasitoid wasps is one of these conditional mutualists. The protection afforded by Hamiltonella depends on the presence of a lysogenic bacteriophage, called APSE, encoding homologs of toxins that are suspected to target wasp cells. In this study, an important diversity of APSE variants is reported from another heritable symbiont, Arsenophonus, which is exceptionally widespread in insects. APSE was found in association with two-thirds of the Arsenophonus strains examined and from a variety of insect groups such as aphids, white flies, parasitoid wasps, triatomine bugs, louse flies, and bat flies. No APSE was, however, found from Arsenophonus relatives such as the recently described Aschnera chinzeii and ALO-3 endosymbionts. Phylogenetic investigations revealed that APSE has a long evolutionary history in heritable symbionts, being secondarily acquired by Hamiltonella through lateral transfer from Arsenophonus. Overall, this highlights the role of lateral transfer as a major evolutionary process shaping the emergence of defensive symbiosis in heritable bacteria.
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Affiliation(s)
- Olivier Duron
- Institut des Sciences de l'Evolution, CNRS-UM2 (UMR5554), Montpellier Cedex 05, France
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37
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Discovery of novel Rickettsiella spp. in ixodid ticks from Western Canada. Appl Environ Microbiol 2013; 80:1403-10. [PMID: 24334664 DOI: 10.1128/aem.03564-13] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The genomic DNA from four species of ixodid ticks in western Canada was tested for the presence of Rickettsiella by PCR analyses targeting the 16S rRNA gene. Eighty-eight percent of the Ixodes angustus (n = 270), 43% of the I. sculptus (n = 61), and 4% of the I. kingi (n = 93) individuals examined were PCR positive for Rickettsiella, whereas there was no evidence for the presence of Rickettsiella in Dermacentor andersoni (n = 45). Three different single-strand conformation polymorphism profiles of the 16S rRNA gene were detected among amplicons derived from Rickettsiella-positive ticks, each corresponding to a different sequence type. Furthermore, each sequence type was associated with a different tick species. Phylogenetic analyses of sequence data of the 16S rRNA gene and three other genes (rpsA, gidA, and sucB) revealed that all three sequence types were placed in a clade that contained species and pathotypes of the genus Rickettsiella. The bacterium in I. kingi represented the sister taxon to the Rickettsiella in I. sculptus, and both formed a clade with Rickettsiella grylli from crickets (Gryllus bimaculatus) and "R. ixodidis" from I. woodi. In contrast, the Rickettsiella in I. angustus was not a member of this clade but was placed external to the clade comprising the pathotypes of R. popilliae. The results indicate the existence of at least two new species of Rickettsiella: one in I. angustus and another in I. kingi and I. sculptus. However, the Rickettsiella strains in I. kingi and I. sculptus may also represent different species because each had unique sequences for all four genes.
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38
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Elnagdy S, Majerus MEN, Gardener M, Lawson Handley LJ. The direct effects of male killer infection on fitness of ladybird hosts (Coleoptera: Coccinellidae). J Evol Biol 2013; 26:1816-25. [PMID: 23869568 DOI: 10.1111/jeb.12186] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 04/08/2013] [Accepted: 04/10/2013] [Indexed: 11/30/2022]
Abstract
Male killing bacteria are common in insects and are thought to persist in host populations primarily by indirect fitness benefits to infected females, whereas direct fitness effects are generally assumed to be neutral or deleterious. Here, we estimated the effect of male killer infection on direct fitness (number of eggs laid, as a measure of fecundity, together with survival) and other life-history traits (development time and body size) in seven ladybird host/male killer combinations. Effects of male killers on fecundity ranged, as expected, from costly to neutral; however, we found evidence of reduced development time and increased survival and body size in infected strains. Greater body size in Spiroplasma-infected Harmonia axyridis corresponded to greater ovariole number and therefore higher potential fecundity. To our knowledge, this is the first report of direct benefits of male killer infection after explicitly controlling for indirect fitness effects. Neutral or deleterious fitness effects of male killer infection should not therefore be automatically assumed.
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Affiliation(s)
- S Elnagdy
- Department of Genetics, University of Cambridge, Cambridge, UK
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39
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Martínez-Rodríguez P, Hernández-Pérez M, Bella JL. Detection of Spiroplasma and Wolbachia in the bacterial gonad community of Chorthippus parallelus. MICROBIAL ECOLOGY 2013; 66:211-223. [PMID: 23588850 DOI: 10.1007/s00248-013-0226-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 03/26/2013] [Indexed: 06/02/2023]
Abstract
We have recently detected the endosymbiont Wolbachia in multiple individuals and populations of the grasshopper Chorthippus parallelus (Orthoptera: acrididae). This bacterium induces reproductive anomalies, including cytoplasmic incompatibility. Such incompatibilities may help explain the maintenance of two distinct subspecies of this grasshopper, C. parallelus parallelus and C. parallelus erythropus, which are involved in a Pyrenean hybrid zone that has been extensively studied for the past 20 years, becoming a model system for the study of genetic divergence and speciation. To evaluate whether Wolbachia is the sole bacterial infection that might induce reproductive anomalies, the gonadal bacterial community of individuals from 13 distinct populations of C. parallelus was determined by denaturing gradient gel electrophoresis analysis of bacterial 16S rRNA gene fragments and sequencing. The study revealed low bacterial diversity in the gonads: a persistent bacterial trio consistent with Spiroplasma sp. and the two previously described supergroups of Wolbachia (B and F) dominated the gonad microbiota. A further evaluation of the composition of the gonad bacterial communities was carried out by whole cell hybridization. Our results confirm previous studies of the cytological distribution of Wolbachia in C. parallelus gonads and show a homogeneous infection by Spiroplasma. Spiroplasma and Wolbachia cooccurred in some individuals, but there was no significant association of Spiroplasma with a grasshopper's sex or with Wolbachia infection, although subtle trends might be detected with a larger sample size. This information, together with previous experimental crosses of this grasshopper, suggests that Spiroplasma is unlikely to contribute to sex-specific reproductive anomalies; instead, they implicate Wolbachia as the agent of the observed anomalies in C. parallelus.
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Affiliation(s)
- P Martínez-Rodríguez
- Departamento de Biología (Genética), Facultad de Ciencias, Universidad Autónoma de Madrid, c/ Darwin, 2, 28049, Madrid, Spain.
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40
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Lateral transfers of insertion sequences between Wolbachia, Cardinium and Rickettsia bacterial endosymbionts. Heredity (Edinb) 2013; 111:330-7. [PMID: 23759724 DOI: 10.1038/hdy.2013.56] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/13/2013] [Accepted: 05/13/2013] [Indexed: 11/09/2022] Open
Abstract
Various bacteria live exclusively within arthropod cells and collectively act as an important driver of arthropod evolutionary ecology. Whereas rampant intra-generic DNA transfers were recently shown to have a pivotal role in the evolution of the most common of these endosymbionts, Wolbachia, the present study show that inter-generic DNA transfers also commonly take place, constituting a potent source of rapid genomic change. Bioinformatic, molecular and phylogenetic data provide evidence that a selfish genetic element, the insertion sequence ISRpe1, is widespread in the Wolbachia, Cardinium and Rickettsia endosymbionts and experiences recent (and likely ongoing) transfers over long evolutionary distances. Although many ISRpe1 copies were clearly expanding and leading to rapid endosymbiont diversification, degraded copies are also frequently found, constituting an unusual genomic fossil record suggestive of ancient ISRpe1 expansions. Overall, the present data highlight how ecological connections within the arthropod intracellular environment facilitate lateral DNA transfers between distantly related bacterial lineages.
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41
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Elnagdy S, Messing S, Majerus MEN. Two strains of male-killing Wolbachia in a ladybird, Coccinella undecimpunctata, from a hot climate. PLoS One 2013; 8:e54218. [PMID: 23349831 PMCID: PMC3549926 DOI: 10.1371/journal.pone.0054218] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 12/10/2012] [Indexed: 11/19/2022] Open
Abstract
Ladybirds are a hot-spot for the invasion of male-killing bacteria. These maternally inherited endosymbionts cause the death of male host embryos, to the benefit of female sibling hosts and the bacteria that they contain. Previous studies have shown that high temperatures can eradicate male-killers from ladybirds, leaving the host free from infection. Here we report the discovery of two maternally inherited sex ratio distorters in populations of a coccinellid, Coccinella undecimpunctata, from a hot lowland region of the Middle East. DNA sequence analysis indicates that the male killing is the result of infection by Wolbachia, that the trait is tetracycline sensitive, and that two distinct strains of Wolbachia co-occur within one beetle population. We discuss the implications of these findings for theories of male-killing and suggest avenues for future field-work on this system.
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Affiliation(s)
- Sherif Elnagdy
- Department of Genetics, University of Cambridge, Cambridge, United Kingdom.
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42
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Martin OY, Puniamoorthy N, Gubler A, Wimmer C, Germann C, Bernasconi MV. Infections with the microbe Cardinium in the Dolichopodidae and other Empidoidea. JOURNAL OF INSECT SCIENCE (ONLINE) 2013; 13:47. [PMID: 23909372 PMCID: PMC3740928 DOI: 10.1673/031.013.4701] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Accepted: 09/05/2012] [Indexed: 06/02/2023]
Abstract
Maternally transmitted reproductive parasites such as Wolbachia and Cardinium can drastically reshape reproduction in their hosts. Beyond skewing sex ratios towards females, these microbes can also cause cytoplasmic incompatibility. Wolbachia probably infects two thirds of insects, but far less is known about the occurrence or action of other bacteria with potentially similar effects. In contrast with the two more widespread reproductive parasites, Wolbachia and Spiroplasma, far less is known of infections with Cardinium (Bacteroidetes) and possible consequences in the Diptera. Here, in an extensive survey, 244 dipteran species from 67 genera belonging to the Dolichopodidae, Empididae, and Hybotidae were assessed for the presence of the microbe Cardinium. Although 130 of the species screened tested positive (ca. 53%), the presence of Cardinium could only be confirmed in 10 species (ca. 4%) based on analysis of sequences. Numerous additional sequences were found to be assignable to known or unknown Bacteroidetes. Considering the known issues concerning specificity of Cardinium primers and the phylogenetic uncertainties surrounding this microbe, the actual prevalence of this symbiont is worthy of further scrutiny. Potential directions for future research on Cardinium-host interactions in Diptera and in general are discussed.
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Affiliation(s)
- Oliver Y. Martin
- ETH Zürich, Experimental Ecology, Institute for Integrative Biology, CHNJ 11, Universitätsstrasse 16, CH-8092 Zürich, Switzerland
- these authors contributed equally
| | - Nalini Puniamoorthy
- Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH8057 Zürich, Switzerland
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore I 17543, Singapore
| | - Andrea Gubler
- Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH8057 Zürich, Switzerland
| | - Corinne Wimmer
- Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH8057 Zürich, Switzerland
| | - Christoph Germann
- Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH8057 Zürich, Switzerland
| | - Marco V. Bernasconi
- Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH8057 Zürich, Switzerland
- Natur-Museum Luzern, Kasernenplatz 6, CH-6003 Luzern, Switzerland
- these authors contributed equally
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43
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Aharon Y, Pasternak Z, Ben Yosef M, Behar A, Lauzon C, Yuval B, Jurkevitch E. Phylogenetic, metabolic, and taxonomic diversities shape mediterranean fruit fly microbiotas during ontogeny. Appl Environ Microbiol 2013; 79:303-13. [PMID: 23104413 PMCID: PMC3536086 DOI: 10.1128/aem.02761-12] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Accepted: 10/22/2012] [Indexed: 11/20/2022] Open
Abstract
The Mediterranean fruit fly (medfly) (Ceratitis capitata) lays eggs in fruits, where larvae subsequently develop, causing large-scale agricultural damage. Within its digestive tract, the fly supports an extended bacterial community that is composed of multiple strains of a variety of enterobacterial species. Most of these bacteria appear to be functionally redundant, with most strains sustaining diazotrophy and/or pectinolysis. At least some of these bacteria were shown to be vertically inherited, but colonization, structural, and metabolic aspects of the community's dynamics have not been investigated. We used fluorescent in situ hybridization, metabolic profiling, plate cultures, and pyrosequencing to show that an initial, egg-borne, diverse community expands throughout the fly's life cycle. While keeping "core" diazotrophic and pectinolytic functions, it also harbors diverse and fluctuating populations that express varied metabolic capabilities. We suggest that the metabolic and compositional plasticity of the fly's microbiota provides potential adaptive advantages to the medfly host and that its acquisition and dynamics are affected by mixed processes that include stochastic effects, host behavior, and molecular barriers.
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Affiliation(s)
- Yael Aharon
- Departments of Microbiology
- Entomology, Hebrew University of Jerusalem, Rehovot, Israel
| | | | - Michael Ben Yosef
- Departments of Microbiology
- Entomology, Hebrew University of Jerusalem, Rehovot, Israel
| | - Adi Behar
- Departments of Microbiology
- Entomology, Hebrew University of Jerusalem, Rehovot, Israel
| | - Carol Lauzon
- Department of Biological Sciences, California State University, Hayward, California, USA
| | - Boaz Yuval
- Entomology, Hebrew University of Jerusalem, Rehovot, Israel
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Kajita Y, O'Neill EM, Zheng Y, Obrycki JJ, Weisrock DW. A population genetic signature of human releases in an invasive ladybeetle. Mol Ecol 2012; 21:5473-83. [PMID: 23043276 DOI: 10.1111/mec.12059] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 08/21/2012] [Accepted: 08/30/2012] [Indexed: 11/30/2022]
Abstract
Biological invasions have been accelerated by a variety of human activities. Propagule pressure, the number of introduced individuals and independent introductions, is probably to be influenced by these human activities and may be an important factor for successful range expansion in new environments. We tested whether the current distribution of the predatory ladybeetle Coccinella septempunctata in the introduced range (USA) is the result of multiple historical human introductions or natural range expansion from the first established populations in the USA. To test this hypothesis, we compared historical records of propagule size, propagule number, specific introduction locations and the date of each introduction, with estimates of genetic variation in mitochondrial DNA (cytochrome oxidase I). Our results indicated that genetic diversity in the introduced range was positively correlated with historical records of propagule size and number and negatively correlated with distance to nearest introduction point, suggesting that multiple human releases were successful. Higher genetic diversity in populations found near introduction points suggest that initial founder effects were limited, but lower genetic diversity found farther from introduction points is probably the result of serial founder effects during secondary range expansion. These results suggest that the current distribution of C. septempunctata in the introduced range is the result of a combination of human releases and short-range expansion from multiple established populations in the introduced range.
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Affiliation(s)
- Yukie Kajita
- Department of Entomology, University of Kentucky, Lexington, KY 40546-0091, USA.
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Still a host of hosts for Wolbachia: analysis of recent data suggests that 40% of terrestrial arthropod species are infected. PLoS One 2012; 7:e38544. [PMID: 22685581 PMCID: PMC3369835 DOI: 10.1371/journal.pone.0038544] [Citation(s) in RCA: 602] [Impact Index Per Article: 50.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 05/07/2012] [Indexed: 11/28/2022] Open
Abstract
Wolbachia are intracellular bacteria that manipulate the reproduction of their arthropod hosts in remarkable ways. They are predominantly transmitted vertically from mother to offspring but also occasionally horizontally between species. In doing so, they infect a huge range of arthropod species worldwide. Recently, a statistical analysis estimated the infection frequency of Wolbachia among arthropod hosts to be 66%. At the same time, the authors of this analysis highlighted some weaknesses of the underlying data and concluded that in order to improve the estimate, a larger number of individuals per species should be assayed and species be chosen more randomly. Here we apply the statistical approach to a more appropriate data set from a recent survey that tested both a broad range of species and a sufficient number of individuals per species. Indeed, we find a substantially different infection frequency: We now estimate the proportion of Wolbachia-infected species to be around 40% which is lower than the previous estimate but still points to a surprisingly high number of arthropods harboring the bacteria. Notwithstanding this difference, we confirm the previous result that, within a given species, typically most or only a few individuals are infected. Moreover, we extend our analysis to include several reproductive parasites other than Wolbachia that were also screened for in the aforementioned empirical survey. For these symbionts we find a large variation in estimated infection frequencies and corroborate the finding that Wolbachia are the most abundant endosymbionts among arthropod species.
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Paramyxean–microsporidian co-infection in amphipods: Is the consensus that Microsporidia can feminise their hosts presumptive? Int J Parasitol 2012; 42:683-91. [DOI: 10.1016/j.ijpara.2012.04.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 04/26/2012] [Accepted: 04/27/2012] [Indexed: 11/22/2022]
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The rickettsial OmpB β-peptide of Rickettsia conorii is sufficient to facilitate factor H-mediated serum resistance. Infect Immun 2012; 80:2735-43. [PMID: 22615250 DOI: 10.1128/iai.00349-12] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Pathogenic species of the spotted fever group Rickettsia are subjected to repeated exposures to the host complement system through cyclic infections of mammalian and tick hosts. The serum complement machinery is a formidable obstacle for bacteria to overcome if they endeavor to endure this endozoonotic cycle. We have previously demonstrated that that the etiologic agent of Mediterranean spotted fever, Rickettsia conorii, is susceptible to complement-mediated killing only in the presence of specific monoclonal antibodies. We have also shown that in the absence of particular neutralizing antibody, R. conorii is resistant to the effects of serum complement. We therefore hypothesized that the interactions between fluid-phase complement regulators and conserved rickettsial outer membrane-associated proteins are critical to mediate serum resistance. We demonstrate here that R. conorii specifically interacts with the soluble host complement inhibitor, factor H. Depletion of factor H from normal human serum renders R. conorii more susceptible to C3 and membrane attack complex deposition and to complement-mediated killing. We identified the autotransporter protein rickettsial OmpB (rOmpB) as a factor H ligand and further demonstrate that the rOmpB β-peptide is sufficient to mediate resistance to the bactericidal properties of human serum. Taken together, these data reveal an additional function for the highly conserved rickettsial surface cell antigen, rOmpB, and suggest that the ability to evade complement-mediated clearance from the hematogenous circulation is a novel virulence attribute for this class of pathogens.
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Smith MA, Bertrand C, Crosby K, Eveleigh ES, Fernandez-Triana J, Fisher BL, Gibbs J, Hajibabaei M, Hallwachs W, Hind K, Hrcek J, Huang DW, Janda M, Janzen DH, Li Y, Miller SE, Packer L, Quicke D, Ratnasingham S, Rodriguez J, Rougerie R, Shaw MR, Sheffield C, Stahlhut JK, Steinke D, Whitfield J, Wood M, Zhou X. Wolbachia and DNA barcoding insects: patterns, potential, and problems. PLoS One 2012; 7:e36514. [PMID: 22567162 PMCID: PMC3342236 DOI: 10.1371/journal.pone.0036514] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 04/02/2012] [Indexed: 01/28/2023] Open
Abstract
Wolbachia is a genus of bacterial endosymbionts that impacts the breeding systems of their hosts. Wolbachia can confuse the patterns of mitochondrial variation, including DNA barcodes, because it influences the pathways through which mitochondria are inherited. We examined the extent to which these endosymbionts are detected in routine DNA barcoding, assessed their impact upon the insect sequence divergence and identification accuracy, and considered the variation present in Wolbachia COI. Using both standard PCR assays (Wolbachia surface coding protein – wsp), and bacterial COI fragments we found evidence of Wolbachia in insect total genomic extracts created for DNA barcoding library construction. When >2 million insect COI trace files were examined on the Barcode of Life Datasystem (BOLD) Wolbachia COI was present in 0.16% of the cases. It is possible to generate Wolbachia COI using standard insect primers; however, that amplicon was never confused with the COI of the host. Wolbachia alleles recovered were predominantly Supergroup A and were broadly distributed geographically and phylogenetically. We conclude that the presence of the Wolbachia DNA in total genomic extracts made from insects is unlikely to compromise the accuracy of the DNA barcode library; in fact, the ability to query this DNA library (the database and the extracts) for endosymbionts is one of the ancillary benefits of such a large scale endeavor – for which we provide several examples. It is our conclusion that regular assays for Wolbachia presence and type can, and should, be adopted by large scale insect barcoding initiatives. While COI is one of the five multi-locus sequence typing (MLST) genes used for categorizing Wolbachia, there is limited overlap with the eukaryotic DNA barcode region.
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Affiliation(s)
- M Alex Smith
- Department of Integrative Biology and the Biodiversity, Institute of Ontario, University of Guelph, Guelph, Ontario, Canada.
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Astrin JJ, Stüben PE, Misof B, Wägele JW, Gimnich F, Raupach MJ, Ahrens D. Exploring diversity in cryptorhynchine weevils (Coleoptera) using distance-, character- and tree-based species delineation. Mol Phylogenet Evol 2011; 63:1-14. [PMID: 22155423 DOI: 10.1016/j.ympev.2011.11.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 11/09/2011] [Accepted: 11/21/2011] [Indexed: 11/17/2022]
Abstract
Species boundaries are studied in a group of beetles, the western Palaearctic Cryptorhynchinae. We test for congruence of 'traditionally' identified morphospecies with species inferred through parsimony networks, distance-based clustering and the ultrametric tree-based generalized mixed yule-coalescent (GMYC) approach. For that purpose, we sequenced two variable fragments of mitochondrial DNA (CO1 and 16S) for a total of 791 specimens in 217 species of Cryptorhynchinae. Parsimony networks, morphology-calibrated distance clusters and the different tree-based species inferences all achieved low congruence with morphospecies, at best 60%. Although the degree of match with morphospecies was often similar for the different approaches, the composition of clusters partially varied. A barcoding gap was absent in morphospecies-oriented distances as well as for GMYC species clusters. This demonstrates that not only erroneous taxonomic assignments, incomplete lineage sorting, hybridization, or insufficient sampling can compromise distance-based identification, but also differences in speciation rates and uneven tree structure. The initially low match between morphospecies and the different molecular species delineation methods in this case study shows the necessity of combining the output of various methods in an integrative approach. Thereby we obtain an idea about the reliability of the different results and signals, which enables us to fine-tune sampling, delineation technique and data collection, and to identify species that require taxonomic revision.
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Affiliation(s)
- Jonas J Astrin
- ZFMK: Zoologisches Forschungsmuseum Alexander Koenig, Adenauerallee 160, D-53113 Bonn, Germany.
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Elnagdy S, Majerus MEN, Handley LJL. The value of an egg: resource reallocation in ladybirds (Coleoptera: Coccinellidae) infected with male-killing bacteria. J Evol Biol 2011; 24:2164-72. [PMID: 21745250 DOI: 10.1111/j.1420-9101.2011.02346.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Male-killing bacteria are thought to persist in host populations by vertical transmission and conferring direct and/or indirect fitness benefits to their hosts. Here, we test the role of indirect fitness benefits accrued from resource reallocation in species that engage in sibling egg cannibalism. We found that a single-egg meal significantly increased larval survival in 12 ladybird species, but the value of an egg (to survival) differed substantially between species. Next, we tested the impact of three male-killing bacteria on larval survival in one ladybird species, Adalia bipunctata. Spiroplasma reduced larval survival, whereas Wolbachia and Rickettsia had no effect. However, Spiroplasma-infected larvae showed the greatest response to a single-egg meal. The indirect fitness benefit obtained from a single egg is thus so large that even male-killing bacteria with direct fitness costs can persist in host populations. This study supports the hypothesis that fitness compensation via resource reallocation can explain male-killing bacteria persistence.
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Affiliation(s)
- S Elnagdy
- Department of Genetics, University of Cambridge, Cambridge, UK
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