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Zhang M, Riaz M, Zhang L, Xia H, El-Desouki Z, Jiang C. Response of fungal communities in different soils to biochar and chemical fertilizers under simulated rainfall conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 691:654-663. [PMID: 31325864 DOI: 10.1016/j.scitotenv.2019.07.151] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/10/2019] [Accepted: 07/10/2019] [Indexed: 06/10/2023]
Abstract
Biochar is a good soil additive, which cannot only effectively store carbon, but also improve soil fertility and crop yield. However, the specific response of fungal communities to biochar and chemical fertilizers are still relatively lacking. In addition, most studies do not take into account rainfall factors when conducting culture experiments. In the case of simulated rainfall, we investigated the response of fungal communities in different soils to biochar and fertilizers in China and analyzed the correlation between chemical properties and different fungal species. The tested soils were yellow-brown soil, fluvo-aquic soil, lou soil and black soil, and the simulated daily rainfall was 25 mm. The results indicated that the application of biochar and chemical fertilizers had a greater impact on the alpha diversity of acidic soils (yellow-brown soil, fluvo-aquic soil), but less on alkaline soils (lou soil, black soil). The relative abundance of Ascomycetes was most affected by biochar and fertilizer in any soil. From the point of view of the fungal community, yellow-brown soil was more suitable for single application of biochar, because it not only improved the ability of the soil to degrade persistent organic matter but also inhibited the spread of soil pathogens. In black soil, the relative abundance of Fusarium was significantly reduced by the combined application of biochar and chemical fertilizers (FC), and the decline was much higher than several other bacteria. However, FC caused the greatest changes in the structure of all soil fungal communities. Moreover, there was a significant correlation between the content of available nutrients and composition of fungal community in fluvo-aquic soil. In summary, it can be explained that the effects of biochar and chemical fertilizers on soil fungi may vary depending on the soil type, so it is very urgent to conduct long-term research on different typical soils.
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Affiliation(s)
- Mengyang Zhang
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei Province 430070, PR China
| | - Muhammad Riaz
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei Province 430070, PR China
| | - Lin Zhang
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei Province 430070, PR China
| | - Hao Xia
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei Province 430070, PR China
| | - Zeinab El-Desouki
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei Province 430070, PR China; Department of Soil Sciences, Faculty of Agriculture, Ain Shams University, Cairo 11241, Egypt
| | - Cuncang Jiang
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei Province 430070, PR China.
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Dong ZX, Li HY, Chen YF, Wang F, Deng XY, Lin LB, Zhang QL, Li JL, Guo J. Colonization of the gut microbiota of honey bee (Apis mellifera) workers at different developmental stages. Microbiol Res 2019; 231:126370. [PMID: 31739261 DOI: 10.1016/j.micres.2019.126370] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 09/28/2019] [Accepted: 10/26/2019] [Indexed: 02/06/2023]
Abstract
The role of the gut microbiome in animal health has become increasingly evident. Although the structure of the gut microbiome of A. mellifera is well known, little is known about the dynamic change across different developmental stages. In this study, we explored the dynamic changes of the gut microbiota of A. mellifera at different developmental stages covering the whole life cycle using high-throughput 16S rRNA gene sequencing. The results indicated that the core (shared) gut microbiota changes significantly among different developmental stages. The diversity of the bacterial community in workers among different ages was significantly different. In addition, by comparing the core gut microbiota among different-aged workers, we found that newly emerged workers had fewer core microbiota. Three genera, Gilliamella, Frischella, and Snodgrassella, were significantly colonized at 1 day poste mergence (dpe); Lactobacillus, Bifidobacterium, Commensalibacter were significantly colonized at 3 dpe and significantly reduced with Gilliamella. Lactobacillus kunkeei and Bartonella were significantly colonized at 12 dpe and were significantly decreased with Lactobacillus helsingborgensis. Commensalibacter and Bifidobacterium were significantly decreased at 25 dpe, and Bacteroides, Escherichia-Shigella, and Porphyromonadaceae were significantly decreased between 19 and 25 dpe. Our results reveal the succession of the gut microbiota of workers from birth to senescence, which provides a theoretical basis for further exploring the roles of gut microbiota during different developmental stages.
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Affiliation(s)
- Zhi-Xiang Dong
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Engineering Research Center for Application Technology of Green Agricultural Microbes of Yunnan College, Kunming, Yunnan 650500, China
| | - Huan-Yuan Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Engineering Research Center for Application Technology of Green Agricultural Microbes of Yunnan College, Kunming, Yunnan 650500, China
| | - Yi-Fei Chen
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Engineering Research Center for Application Technology of Green Agricultural Microbes of Yunnan College, Kunming, Yunnan 650500, China
| | - Feng Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Engineering Research Center for Application Technology of Green Agricultural Microbes of Yunnan College, Kunming, Yunnan 650500, China
| | - Xian-Yu Deng
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Engineering Research Center for Application Technology of Green Agricultural Microbes of Yunnan College, Kunming, Yunnan 650500, China
| | - Lian-Bing Lin
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Engineering Research Center for Application Technology of Green Agricultural Microbes of Yunnan College, Kunming, Yunnan 650500, China
| | - Qi-Lin Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Engineering Research Center for Application Technology of Green Agricultural Microbes of Yunnan College, Kunming, Yunnan 650500, China.
| | - Ji-Lian Li
- Ministry Key Laboratory of Pollinating Insect Biology, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China.
| | - Jun Guo
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; Engineering Research Center for Application Technology of Green Agricultural Microbes of Yunnan College, Kunming, Yunnan 650500, China.
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Noskov YA, Polenogova OV, Yaroslavtseva ON, Belevich OE, Yurchenko YA, Chertkova EA, Kryukova NA, Kryukov VY, Glupov VV. Combined effect of the entomopathogenic fungus Metarhizium robertsii and avermectins on the survival and immune response of Aedes aegypti larvae. PeerJ 2019; 7:e7931. [PMID: 31667017 PMCID: PMC6816395 DOI: 10.7717/peerj.7931] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 09/23/2019] [Indexed: 12/18/2022] Open
Abstract
Combination of insect pathogenic fungi and microbial metabolites is a prospective method for mosquito control. The effect of the entomopathogenic fungus Metarhizium robertsii J.F. Bischoff, S.A. Rehner & Humber and avermectins on the survival and physiological parameters of Aedes aegypti (Linnaeus, 1762) larvae (dopamine concentration, glutathione S-transferase (GST), nonspecific esterases (EST), acid proteases, lysozyme-like, phenoloxidase (PO) activities) was studied. It is shown that the combination of these agents leads to a synergistic effect on mosquito mortality. Colonization of Ae. aegypti larvae by hyphal bodies following water inoculation with conidia is shown for the first time. The larvae affected by fungi are characterized by a decrease in PO and dopamine levels. In the initial stages of toxicosis and/or fungal infection (12 h posttreatment), increases in the activity of insect detoxifying enzymes (GST and EST) and acid proteases are observed after monotreatments, and these increases are suppressed after combined treatment with the fungus and avermectins. Lysozyme-like activity is also most strongly suppressed under combined treatment with the fungus and avermectins in the early stages posttreatment (12 h). Forty-eight hours posttreatment, we observe increases in GST, EST, acid proteases, and lysozyme-like activities under the influence of the fungus and/or avermectins. The larvae affected by avermectins accumulate lower levels of conidia than avermectin-free larvae. On the other hand, a burst of bacterial CFUs is observed under treatment with both the fungus and avermectins. We suggest that disturbance of the responses of the immune and detoxifying systems under the combined treatment and the development of opportunistic bacteria may be among the causes of the synergistic effect.
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Affiliation(s)
- Yuriy A Noskov
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia.,Tomsk State University, Tomsk, Russia
| | - Olga V Polenogova
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | - Olga N Yaroslavtseva
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | - Olga E Belevich
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | - Yuriy A Yurchenko
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | - Ekaterina A Chertkova
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | - Natalya A Kryukova
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | - Vadim Yu Kryukov
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | - Viktor V Glupov
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
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Zhang F, Yang R. Life history and functional capacity of the microbiome are altered in beta-cypermethrin-resistant cockroaches. Int J Parasitol 2019; 49:715-723. [PMID: 31269412 DOI: 10.1016/j.ijpara.2019.04.006] [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: 12/11/2018] [Revised: 04/22/2019] [Accepted: 04/26/2019] [Indexed: 01/17/2023]
Abstract
Cockroaches are widely perceived to evolve resistance to insecticides. Over-expression of a resistance-conferring gene can be costly and may require energy and resource reallocation for metabolic and developmental processes. To evaluate whether changes in the composition of gut microbiota in Blattella germanica affected its resistance evolution to beta-cypermethrin and to determine the role of gut microbiota in host growth and development, we studied the relationship between insecticide resistance and the diversity and genetic content of gut microbiota in cockroaches. Results suggest beta-cypermethrin-resistant cockroaches (R strain) exhibited a delayed development period and reduced adult longevity compared with susceptible cockroaches (S strain). Based on 16S rRNA gene sequencing and community metagenomics, we found that the relative abundance of Lactobacillus and Acetobacteraceae were significantly lower in the R strain compared with the S strain in the foregut and midgut of both strains. Functional annotation of Kyoto Encyclopedia of Genes and Genomes (KEGG) modules of midgut genes in the two strains revealed that 10.6% were involved in metabolism, while the relative abundance in the R strain was 7.4%. Unigenes were also translated into amino acid sequences and assigned to protein families based on hits to the Carbohydrate-Active enzymes (CAZy) database. This process identified the glycoside hydrolases, glycosyl transferases and carbohydrate-binding modules of the S strain as all being significantly higher in diversity than those in the R strain. Overall, we conclude that fitness-related costs increased in the resistant strain of cockroaches compared with the susceptible strain, and the variation in insect gut microbiota, especially those related to growth and development, was an important influencing factor.
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Affiliation(s)
- Fan Zhang
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, 88 East Wenhua Road, Jinan 250014, People's Republic of China.
| | - Rongai Yang
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, 88 East Wenhua Road, Jinan 250014, People's Republic of China
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55
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Yang CL, Zhu HY, Zhang F. Comparative Proteomics Analysis Between the Short-Term Stress and Long-Term Adaptation of the Blattella germanica (Blattodea: Blattellidae) in Response to Beta-Cypermethrin. JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:1396-1402. [PMID: 30835785 DOI: 10.1093/jee/toz047] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Indexed: 06/09/2023]
Abstract
A proteomic method combining two-dimensional polyacrylamide gel electrophoresis and tandem mass spectrometry was used to compare the hemolymph expression profiles of a beta-cypermethrin-resistant Blattella germanica L. strain (R) and a susceptible strain (S) after 24 h of beta-cypermethrin induction. The results showed that there were 42 differentially expressed proteins after induction of the R strain: 4 proteins were upregulated and 38 proteins were downregulated. One hundred one hemolymph proteins were differentially expressed after induction of the S strain: 53 proteins were upregulated and 48 proteins were downregulated. The identified proteins were mainly classified into the following categories: energy metabolism proteins such as arginine kinase and triose phosphate isomerase, detoxification-related proteins such as glutathione S-transferases (GSTs), signal molecule-regulated proteins such as nitric oxide synthase (NOS), and other proteins such as kinetic-related proteins and gene expression-related proteins. Several proteins show significant differences in response to short-term stress and long-term adaptation, and differential expression of these proteins reflects an overall change in cellular structure and metabolism associated with resistance to pyrethroid insecticides. In summary, our research has improved the understanding of the molecular mechanisms of beta-cypermethrin resistance in German cockroaches, which will facilitate the development of rational methods to improve the management of this pest.
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Affiliation(s)
- Cheng Long Yang
- Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University, Jinan, People of Republic of China
| | - Hai Ying Zhu
- Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University, Jinan, People of Republic of China
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Polenogova OV, Kabilov MR, Tyurin MV, Rotskaya UN, Krivopalov AV, Morozova VV, Mozhaitseva K, Kryukova NA, Alikina T, Kryukov VY, Glupov VV. Parasitoid envenomation alters the Galleria mellonella midgut microbiota and immunity, thereby promoting fungal infection. Sci Rep 2019; 9:4012. [PMID: 30850650 PMCID: PMC6408550 DOI: 10.1038/s41598-019-40301-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 02/12/2019] [Indexed: 12/26/2022] Open
Abstract
Gut bacteria influence the development of different pathologies caused by bacteria, fungi and parasitoids in insects. Wax moth larvae became more susceptible to fungal infections after envenomation by the ectoparasitoid Habrobracon hebetor. In addition, spontaneous bacterioses occurred more often in envenomated larvae. We analyzed alterations in the midgut microbiota and immunity of the wax moth in response to H. hebetor envenomation and topical fungal infection (Beauveria bassiana) alone or in combination using 16S rRNA sequencing, an analysis of cultivable bacteria and a qPCR analysis of immunity- and stress-related genes. Envenomation led to a predominance shift from enterococci to enterobacteria, an increase in CFUs and the upregulation of AMPs in wax moth midguts. Furthermore, mycosis nonsignificantly increased the abundance of enterobacteria and the expression of AMPs in the midgut. Combined treatment led to a significant increase in the abundance of Serratia and a greater upregulation of gloverin. The oral administration of predominant bacteria (Enterococcus faecalis, Enterobacter sp. and Serratia marcescens) to wax moth larvae synergistically increased fungal susceptibility. Thus, the activation of midgut immunity might prevent the bacterial decomposition of envenomated larvae, thus permitting the development of fungal infections. Moreover, changes in the midgut bacterial community may promote fungal killing.
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Affiliation(s)
- Olga V Polenogova
- Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091, Russia
| | - Marsel R Kabilov
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Maksim V Tyurin
- Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091, Russia
| | - Ulyana N Rotskaya
- Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091, Russia
| | - Anton V Krivopalov
- Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091, Russia
| | - Vera V Morozova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Kseniya Mozhaitseva
- Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091, Russia
| | - Nataliya A Kryukova
- Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091, Russia
| | - Tatyana Alikina
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Vadim Yu Kryukov
- Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091, Russia.
| | - Viktor V Glupov
- Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091, Russia
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Zhou F, Wu X, Xu L, Guo S, Chen G, Zhang X. Repressed Beauveria bassiana infections in Delia antiqua due to associated microbiota. PEST MANAGEMENT SCIENCE 2019; 75:170-179. [PMID: 29797399 DOI: 10.1002/ps.5084] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 04/18/2018] [Accepted: 05/17/2018] [Indexed: 05/15/2023]
Abstract
BACKGROUND Insects form both mutualistic and antagonistic relationships with microbes, and some antagonistic microbes have been used as biocontrol agents (BCAs) in pest management. Contextually, BCAs may be inhibited by beneficial insect symbionts, which can become potential barriers to entomopathogen-dependent pest biocontrol. Using the symbioses formed by one devastating dipteran pest, Delia antiqua, and its associated microbes as a model system, we sought to determine whether the antagonistic interaction between BCAs and microbial symbionts could affect the outcome of entomopathogen-dependent pest biocontrol. RESULTS The result showed that in contrast to non-axenic D. antiqua larvae, i.e., onion maggots, axenic larvae lost resistance to the entomopathogenic Beauveria bassiana, and the re-inoculation of microbiota increased the resistance of axenic larvae to B. bassiana. Furthermore, bacteria frequently isolated from larvae, including Citrobacter freundii, Enterobacter ludwigii, Pseudomonas protegens, Serratia plymuthica, Sphingobacterium faecium and Stenotrophomonas maltophilia, suppressed B. bassiana conidia germination and hyphal growth, and the re-inoculation of specific individual bacteria enhanced the resistance of axenic larvae to B. bassiana. CONCLUSION Bacteria associated with larvae, including C. freundii, E. ludwigii, P. protegens, S. plymuthica, S. faecium and S. maltophilia, can inhibit B. bassiana infection. Removing the microbiota can suppress larval resistance to fungal infection. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Fangyuan Zhou
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Xiaoqing Wu
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Letian Xu
- Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, College of Life Science, Hubei University, Wuhan, China
| | - Shuhai Guo
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Guanhong Chen
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Xinjian Zhang
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
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Zhang XC, Li XX, Gong YW, Li YR, Zhang KL, Huang YH, Zhang F. Isolation, Identification, and Virulence of a New Metarhizium anisopliae Strain on the German Cockroach. JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:2611-2616. [PMID: 30256959 DOI: 10.1093/jee/toy280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Indexed: 06/08/2023]
Abstract
The efficacy of a new and highly virulent Metarhizium anisopliae (Hypocreales: Clavicipitaceae) strain was evaluated against Blattella germanica (L.) (Blattaria: Blattellidae) in the laboratory; this strain was obtained and purified from field-collected Eupolyphaga sinensis cadavers. The status of this fungus as a new and genetically distinct species was supported by ITS sequence comparisons. The new strain was compared with other M. anisopliae isolates and was found to be highly infectious and virulent against B. germanica. The virulence of this new strain against different instars of male and female cockroaches at five conidia concentrations (1 × 105, 1 × 106, 1 × 107, 1 × 108, and 1 × 109 conidia/ml) was evaluated in vitro, and the mortality (measured as lethal concentrations, LC50) was determined. According to the pathogenicity test, M. anisopliae isolate EB0732 produced 100% mortality of one- to three-instar nymph (LC50 = 0.37 × 105conidia/ml) and 78.33% mortality of adult female (LC50 = 1.39 × 107 conidia/ml) at 15 d post-inoculation at a concentration of 1 × 109 conidia/ml. There was an overall significant effect on mortality between the age and sex of B. germanica. A M. anisopliae susceptibility test showed that the survival rate of cockroaches after treatment with topical applications and mixed infection was lower than per os. These studies shed light on a valuable integrated pest management against the German cockroach.
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Affiliation(s)
- Xian C Zhang
- Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University, Jinan, People of Republic of China
| | - Xiao X Li
- Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University, Jinan, People of Republic of China
| | - Yi W Gong
- Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University, Jinan, People of Republic of China
| | - Ya R Li
- Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University, Jinan, People of Republic of China
| | - Kai L Zhang
- Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University, Jinan, People of Republic of China
| | - Yan H Huang
- Food and Fermentation Engineering Key Laboratory of Shandong Province, Jinan, People of Republic of China
| | - Fan Zhang
- Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University, Jinan, People of Republic of China
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Pietri JE, Tiffany C, Liang D. Disruption of the microbiota affects physiological and evolutionary aspects of insecticide resistance in the German cockroach, an important urban pest. PLoS One 2018; 13:e0207985. [PMID: 30540788 PMCID: PMC6291076 DOI: 10.1371/journal.pone.0207985] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 11/11/2018] [Indexed: 12/25/2022] Open
Abstract
The German cockroach, Blatella germanica, is a common pest in urban environments and is among the most resilient insects in the world. The remarkable ability of the German cockroach to develop resistance when exposed to toxic insecticides is a prime example of adaptive evolution and makes control of this insect an ongoing struggle. Like many other organisms, the German cockroach is host to a diverse community of symbiotic microbes that play important roles in its physiology. In some insect species, there is a strong correlation between the commensal microbial community and insecticide resistance. In particular, several bacteria have been implicated in the detoxification of xenobiotics, including synthetic insecticides. While multiple mechanisms that mediate insecticide resistance in cockroaches have been discovered, significant knowledge gaps still exist in this area of research. Here, we examine the effects of altering the microbiota on resistance to a common insecticide using antibiotic treatments. We describe an indoxacarb-resistant laboratory strain in which treatment with antibiotic increases susceptibility to orally administered insecticide. We further reveal that this strains harbors a gut microbial community that differs significantly from that of susceptible cockroaches in which insecticide resistance is unaffected by antibiotic. More importantly, we demonstrate that transfer of gut microbes from the resistant to the susceptible strain via fecal transplant increases its resistance. Lastly, our data show that antibiotic treatment adversely affects several reproductive life-history traits that may contribute to the dynamics of resistance at the population level. Together these results suggest that the microbiota contributes to both physiological and evolutionary aspects of insecticide resistance and that targeting this community may be an effective strategy to control the German cockroach.
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Affiliation(s)
- Jose E. Pietri
- Apex Bait Technologies, Inc., Santa Clara, California, United States of America
| | - Connor Tiffany
- University of California, Davis School of Medicine, Department of Medical Microbiology & Immunology, Davis, California, United States of America
| | - Dangsheng Liang
- Apex Bait Technologies, Inc., Santa Clara, California, United States of America
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