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Chang X, Xue S, Li R, Zhang Y. Episyrphus balteatus symbiont variation across developmental stages, living states, two sexes, and potential horizontal transmission from prey or environment. Front Microbiol 2024; 14:1308393. [PMID: 38249471 PMCID: PMC10797133 DOI: 10.3389/fmicb.2023.1308393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/08/2023] [Indexed: 01/23/2024] Open
Abstract
Introduction Episyrphus balteatus is one representative Syrphidae insect which can provide extensive pollination and pest control services. To date, the symbiont composition and potential acquisition approaches in Syrphidae remain unclear. Methods Herein, we investigated microbiota dynamics across developmental stages, different living states, and two sexes in E. balteatus via full-length 16S rRNA genes sequencing, followed by an attempt to explore the possibility of symbiont transmission from prey Megoura crassicauda to the hoverfly. Results Overall, Proteobacteria and Firmicutes were the dominant bacteria phyla with fluctuating relative abundances across the life stage. Cosenzaea myxofaciens is dominant in adulthood, while Enterococcus silesiacus and Morganella morganii dominate in larvae and pupae of E. balteatus, respectively. Unexpectedly, Serratia symbiotica, one facultative endosymbiont commonly harbored in aphids, was one of the predominant bacteria in larvae of E. balteatus, just behind Enterococcus silesiacus. In addition, S. symbiotica was also surprisingly most dominated in M. crassicauda aphids (92.1% relative abundance), which are significantly higher than Buchnera aphidicola (4.7% relative abundance), the primary obligate symbiont of most aphid species. Approximately 25% mortality was observed among newly emerged adults, of which microbiota was also disordered, similar to normally dying individuals. Sexually biased symbionts and 41 bacteria species with pairwise co-occurrence in E. balteatus and 23 biomarker species for each group were identified eventually. Functional prediction showed symbionts of hoverflies and aphids, both mainly focusing on metabolic pathways. In brief, we comprehensively explored the microbiome in one Syrphidae hoverfly using E. balteatus reared indoors on M. morganii as the model, revealed its dominated symbiont species, identified sexually biased symbionts, and found an aphid facultative endosymbiont inhabited in the hoverfly. We also found that the dominated symbiotic bacteria in M. crassicauda are S. symbiotica other than Buchnera aphidicola. Discussion Taken together, this study provides new valuable resources about symbionts in hoverflies and prey aphids jointly, which will benefit further exploring the potential roles of microbiota in E. balteatus.
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Affiliation(s)
- Xiao Chang
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
- School of Biological and Food Engineering, Anyang Institute of Technology, Anyang, China
- Research Base, Anyang Institute of Technology, National Key Laboratory of Cotton Bio-breeding and Inte-grated Utilization, Anyang, Henan, China
- Taihang Mountain Forest Pests Observation and Research Station of Henan Province, Linzhou, China
| | - Shuang Xue
- School of Biological and Food Engineering, Anyang Institute of Technology, Anyang, China
- Research Base, Anyang Institute of Technology, National Key Laboratory of Cotton Bio-breeding and Inte-grated Utilization, Anyang, Henan, China
- Taihang Mountain Forest Pests Observation and Research Station of Henan Province, Linzhou, China
| | - Ruimin Li
- School of Biological and Food Engineering, Anyang Institute of Technology, Anyang, China
- Research Base, Anyang Institute of Technology, National Key Laboratory of Cotton Bio-breeding and Inte-grated Utilization, Anyang, Henan, China
- Taihang Mountain Forest Pests Observation and Research Station of Henan Province, Linzhou, China
| | - Yuanchen Zhang
- School of Biological and Food Engineering, Anyang Institute of Technology, Anyang, China
- Research Base, Anyang Institute of Technology, National Key Laboratory of Cotton Bio-breeding and Inte-grated Utilization, Anyang, Henan, China
- Taihang Mountain Forest Pests Observation and Research Station of Henan Province, Linzhou, China
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Wang Y, Gao P, Zheng J, Li H, Meng L, Li B. Effects of parasitism by a parasitoid wasp on the gut microbiota in a predaceous lady beetle host. PEST MANAGEMENT SCIENCE 2023; 79:4501-4507. [PMID: 37418555 DOI: 10.1002/ps.7652] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 06/17/2023] [Accepted: 07/07/2023] [Indexed: 07/09/2023]
Abstract
BACKGROUND The gut microbiota has an intimate relationship with insect hosts and this relationship can become complicated with parasitic organisms being involved with the host. To date there has been limited evidence for the relevance of parasitism of the host by parasitoids to host gut microbiota, especially in host insect predators. Here, our study examined gut microbiotas in larvae of the predaceous lady beetle, Coccinella septempunctata, in response to their parasitism by Homalotylus eytelweinii regarding the development progress of offspring parasitoids. RESULTS Overall 58.5% of gut bacterial operational taxonomic units (OTUs) in the parasitized lady beetle were different from those in the unparasitized host. The phylum Proteobacteria abundance increased while Firmicutes decreased in parasitized hosts compared to the unparasitized. The abundance of genus Aeribacillus decreased substantially in the parasitized lady beetle across all stages of the offspring development compared to the unparasitized host. The α-diversity of the gut microbiota in a parasitized lady beetle larva increased at the early stage of offspring parasitoids and then returned over the intermediate and later stages. Analyses of β-diversity indicated that the gut microbial community in a parasitized lady beetle was distinct from that in an unparasitized one and different between early or middle and late stages of offspring parasitoids in parasitized hosts. CONCLUSION Our results provide evidence for the relevance of the gut microbiota to interactions between a lady beetle host and its parasitoid. Our study provides a starting point for further investigations of the role the gut microbiota may play in host-parasitoid interactions. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Yansong Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Ping Gao
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Jie Zheng
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Hongran Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Ling Meng
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Baoping Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
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