1
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Li X, Huang X, Hu X, Chong Y. Effects of hematite on two types of dissolved organic compounds in lignocellulosic anaerobic hydrolysate: Lignin-derived aromatic compounds and denitrifying carbon sources. BIORESOURCE TECHNOLOGY 2024; 399:130606. [PMID: 38499201 DOI: 10.1016/j.biortech.2024.130606] [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: 01/21/2024] [Revised: 03/06/2024] [Accepted: 03/15/2024] [Indexed: 03/20/2024]
Abstract
The utilization of anaerobic hydrolysate from agroforestry wastes is limited by dissolved lignin and aromatics, which have received insufficient attention despite their potential as excellent carbon sources for denitrification. This study aims to investigate the influence of hematite on lignin-derived aromatic compounds and denitrifying carbon sources, as well as to identify iron-reducing bacteria that utilize lignin-derived aromatic compounds as electron donors. The findings revealed that hematite facilitated the anaerobic fermentation of plant biomass, resulting in the production of small molecular organic acids. Moreover, biodegradation of lignin-derived aromatic compounds led to the formation of phenolic acids, while an increased generation of denitrifying carbon sources enhanced nitrogen removal efficiency by 13.84 %. Additionally, due to adsorption by hematite and subsequent microbial degradation, there was a significant improvement (40.32%) in color removal rate within denitrification effluent. Notably, Azonexus strains were hypothesized to be involved in Fe(Ⅲ) reduction coupled with aromatic compounds oxidation.
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Affiliation(s)
- Xinjing Li
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Xiangwei Huang
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Xingbao Hu
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Yunxiao Chong
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
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2
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Frias J, Garriga A, Peñalver Á, Teixeira M, Beltrí R, Toubarro D, Simões N. Exploring Gut Microbiome Variations between Popillia japonica Populations of Azores. Microorganisms 2023; 11:1972. [PMID: 37630532 PMCID: PMC10459852 DOI: 10.3390/microorganisms11081972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 07/26/2023] [Accepted: 07/29/2023] [Indexed: 08/27/2023] Open
Abstract
Popillia japonica (Coleoptera: Scarabaeidae), is an emerging invasive pest in Europe and America. In the Azores, this pest was first found on Terceira Island during the sixties and soon spread to other islands. The rate of infestation differs between islands, and we hypothesized that microbiome composition could play a role. Therefore, we sampled 3rd instar larvae and soil from sites with high and low infestation rates to analyze the microbiome using next-generation sequencing. We analyzed twenty-four 16S DNA libraries, which resulted in 3278 operational taxonomic units. The alpha and beta diversity of the soil microbiome was similar between sites. In contrast, the larvae from high-density sites presented a higher bacterial gut diversity than larvae from low-density sites, with biomarkers linked to plant digestion, nutrient acquisition, and detoxification. Consequently, larvae from high-density sites displayed several enriched molecular functions associated with the families Ruminococcaceae, Clostridiaceae and Rikenellaceae. These bacteria revealed a supportive function by producing several CAZyme families and other proteins. These findings suggest that the microbiome must be one drive for the increase in P. japonica populations, thus providing a checkpoint in the establishment and spread of this pest.
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Affiliation(s)
- Jorge Frias
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
| | - Anna Garriga
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
- Departament de Biologia Animal, Vegetal i Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Ángel Peñalver
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
| | - Mário Teixeira
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
| | - Rubén Beltrí
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
| | - Duarte Toubarro
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
| | - Nelson Simões
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
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3
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Xu Q, Long S, Liu X, Duan A, Du M, Lu Q, Leng L, Leu SY, Wang D. Insights into the Occurrence, Fate, Impacts, and Control of Food Additives in Food Waste Anaerobic Digestion: A Review. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:6761-6775. [PMID: 37070716 DOI: 10.1021/acs.est.2c06345] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The recovery of biomass energy from food waste through anaerobic digestion as an alternative to fossil energy is of great significance for the development of environmental sustainability and the circular economy. However, a substantial number of food additives (e.g., salt, allicin, capsaicin, allyl isothiocyanate, monosodium glutamate, and nonnutritive sweeteners) are present in food waste, and their interactions with anaerobic digestion might affect energy recovery, which is typically overlooked. This work describes the current understanding of the occurrence and fate of food additives in anaerobic digestion of food waste. The biotransformation pathways of food additives during anaerobic digestion are well discussed. In addition, important discoveries in the effects and underlying mechanisms of food additives on anaerobic digestion are reviewed. The results showed that most of the food additives had negative effects on anaerobic digestion by deactivating functional enzymes, thus inhibiting methane production. By reviewing the response of microbial communities to food additives, we can further improve our understanding of the impact of food additives on anaerobic digestion. Intriguingly, the possibility that food additives may promote the spread of antibiotic resistance genes, and thus threaten ecology and public health, is highlighted. Furthermore, strategies for mitigating the effects of food additives on anaerobic digestion are outlined in terms of optimal operation conditions, effectiveness, and reaction mechanisms, among which chemical methods have been widely used and are effective in promoting the degradation of food additives and increasing methane production. This review aims to advance our understanding of the fate and impact of food additives in anaerobic digestion and to spark novel research ideas for optimizing anaerobic digestion of organic solid waste.
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Affiliation(s)
- Qing Xu
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, P. R. China
| | - Sha Long
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, P. R. China
| | - Xuran Liu
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong SAR, P. R. China
| | - Abing Duan
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, P. R. China
| | - Mingting Du
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, P. R. China
| | - Qi Lu
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, P. R. China
| | - Ling Leng
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong SAR, P. R. China
| | - Shao-Yuan Leu
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong SAR, P. R. China
| | - Dongbo Wang
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, P. R. China
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4
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Lu Q, He D, Liu X, Du M, Xu Q, Wang D. 1-Butyl-3-methylimidazolium Chloride Affects Anaerobic Digestion through Altering Organics Transformation, Cell Viability, and Microbial Community. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:3145-3155. [PMID: 36795785 DOI: 10.1021/acs.est.2c08004] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
1-Butyl-3-methylimidazolium chloride (BmimCl), an imidazolium-based ionic liquid, is considered the representative emerging persistent aquatic pollutant, and its environmental toxicity has attracted a growing concern. However, most of the investigations focused on monocultures or a single organism, with little information available on the complex syntrophic consortium that dominates the complex and successional biochemical processes, such as anaerobic digestion. In this study, the effect of BmimCl at environmentally relevant levels on glucose anaerobic digestion was therefore investigated in several laboratory-scale mesophilic anaerobic digesters to provide such support. Experimental results showed that BmimCl at 1-20 mg/L inhibited the methane production rate by 3.50-31.03%, and 20 mg/L BmimCl inhibited butyrate, hydrogen, and acetate biotransformation by 14.29%, 36.36%, and 11.57%, respectively. Toxicological mechanism studies revealed that extracellular polymeric substances (EPSs) adsorbed and accumulated BmimCl through carboxyl, amino, and hydroxyl groups, which destroyed the EPSs' conformational structure, thereby leading to the inactivation of microbial cells. MiSeq sequencing data indicated that the abundance of Clostridium_sensu_stricto_1, Bacteroides, and Methanothrix decreased by 6.01%, 7.02%, and 18.45%, respectively, in response to 20 mg/L BmimCl. Molecular ecological network analysis showed that compared with the control, the lower network complexity, fewer keystone taxa, and fewer associations among microbial taxa were found in the BmimCl-present digester, indicating the reduced stability of the microbial community.
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Affiliation(s)
- Qi Lu
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, PR China
| | - Dandan He
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, PR China
| | - Xuran Liu
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, SAR 999077, PR China
| | - Mingting Du
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, PR China
| | - Qing Xu
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, PR China
| | - Dongbo Wang
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, PR China
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5
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Pittino F, Ambrosini R, Seeger M, Azzoni RS, Diolaiuti G, Alviz Gazitua P, Franzetti A. Geographical variability of bacterial communities of cryoconite holes of Andean glaciers. Sci Rep 2023; 13:2633. [PMID: 36788266 PMCID: PMC9929092 DOI: 10.1038/s41598-022-24373-5] [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: 04/20/2022] [Accepted: 11/14/2022] [Indexed: 02/16/2023] Open
Abstract
Cryoconite holes, ponds full of melting water with sediment on the bottom, are hotspots of biodiversity on glacier surfaces and host dynamic micro-ecosystems. They have been extensively investigated in different areas of the world (e.g., the Arctic, Antarctic, Alps, and Himalaya), but so far no study has described the bacterial communities of the glaciers in the Andes, the world's longest mountain range. In this study, we describe the bacterial communities of three small (< 2 km2) high-elevation (< 4200 m a.s.l.) glaciers of the Central Andes (Iver, East Iver and Morado glaciers) and two large (> 85 km2) glaciers of the Patagonian Andes (Exploradores and Perito Moreno glaciers) whose ablation tongues reach low altitude (< 300 m a.s.l.). Results show that the bacterial communities were generally similar to those observed in the cryoconite holes of other continents, but with few cyanobacteria (0.5% of sequences). The most abundant orders were Betaproteobacteriales, Cytophagales, Chitinophagales, Acetobacterales, Frankiales, Armatimonadales, Sphingobacteriales, Rhizobiales, Bacteroidales, Sphingomonadales, and Micrococcales. The bacterial communities differed between glaciers and both water pH and O2 concentration appeared to influence the bacterial community composition. This work thus provides the first description of the bacterial communities in cryoconite holes of South American glaciers.
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Affiliation(s)
- F. Pittino
- grid.7563.70000 0001 2174 1754Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano-Bicocca, Milan, Italy ,grid.419754.a0000 0001 2259 5533WSL Swiss Federal Research Institute, Birmensdorf, Switzerland
| | - R. Ambrosini
- grid.4708.b0000 0004 1757 2822Laboratory of Glacier Ecology, Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy
| | - M. Seeger
- grid.12148.3e0000 0001 1958 645XMolecular Microbiology and Environmental Biotechnology Laboratory, Department of Chemistry, Universidad Técnica Federico Santa María, Valparaiso, Chile
| | - R. S. Azzoni
- grid.4708.b0000 0004 1757 2822Laboratory of Glacier Ecology, Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy ,grid.4708.b0000 0004 1757 2822Department of Earth Science “Ardito Desio”, Università degli Studi di Milano, Milan, Italy
| | - G. Diolaiuti
- grid.4708.b0000 0004 1757 2822Laboratory of Glacier Ecology, Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy
| | - P. Alviz Gazitua
- grid.442234.70000 0001 2295 9069Departamento de Ciencias Biológicas, Universidad de los Lagos, Osorno, Chile
| | - A. Franzetti
- grid.7563.70000 0001 2174 1754Department of Earth and Environmental Sciences (DISAT), Università degli Studi di Milano-Bicocca, Milan, Italy
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6
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Lu F, Huang L, Qian F, Jiang Q, Khan S, Shen P. Resistance of anaerobic activated sludge acclimated by different feeding patterns: response to different stress shocks. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 85:3023-3035. [PMID: 35638803 DOI: 10.2166/wst.2022.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Anaerobic activated sludge plays a key role in the anaerobic digestion (AD) treatment of wastewater. The ability of anaerobic activated sludge to endure stress shock determines the performance of AD. In this study, the resistance of anaerobic activated sludge acclimated by three feeding patterns (continuous, semi-continuous, and pulse) to four stress shocks, including low pH influent, high OLR (organic loading rate), high ammonium and high sulfate, was investigated respectively. The results showed that the anaerobic activated sludge acclimated by semi-continuous feeding had the best resistance to high OLR shock, followed by pulse feeding, and then continuous feeding. There was no significant difference in the resistance of the three activated sludge to the other stress shocks. Under stress shock, the microbial community structure and abundance of specific functional microorganisms in the activated sludge acclimated by different feeding patterns varied, while the relative abundance of Methanosarcinaceae in the anaerobic activated sludge increased. The variation in the relative abundance of specific functional microorganisms was in charge of the differences in the resistance of anaerobic activated sludge. Overall, the results presented herein provide reference for improving the stability and effectiveness of activated sludge under adverse conditions.
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Affiliation(s)
- Fuzhi Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, Guangxi 530005, China E-mail: ; Application and research center of agricultural biotechnology of Hechi University, College of Chemical and Biological Engineering, Hechi University, Hechi, Guangxi 546300, China
| | - Luodong Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, Guangxi 530005, China E-mail:
| | - Feng Qian
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, Guangxi 530005, China E-mail: ; Application and research center of agricultural biotechnology of Hechi University, College of Chemical and Biological Engineering, Hechi University, Hechi, Guangxi 546300, China
| | - Qiong Jiang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, Guangxi 530005, China E-mail:
| | - Sohail Khan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, Guangxi 530005, China E-mail:
| | - Peihong Shen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, Guangxi 530005, China E-mail:
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7
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Zhu YX, Huo QB, Wen T, Wang XY, Zhao MY, Du YZ. Mechanisms of fungal community assembly in wild stoneflies moderated by host characteristics and local environment. NPJ Biofilms Microbiomes 2022; 8:31. [PMID: 35477734 PMCID: PMC9046381 DOI: 10.1038/s41522-022-00298-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 04/04/2022] [Indexed: 11/11/2022] Open
Abstract
Deterministic and stochastic forces both drive microbiota assembly in animals, yet their relative contribution remains elusive, especially in wild aquatic-insect-associated fungal communities. Here, we applied amplicon sequencing to survey the assembly mechanisms of the fungal community in 155 wild stonefly individuals involving 44 species of 20 genera within eight families collected from multiple locations in China. Analysis showed that fungal diversity and network complexity differed significantly among the eight stonefly families, and that the fungal communities in stoneflies exhibited a significant distance-decay pattern across large spatial scales. Both a structural equation model and variance partitioning analysis revealed that environmental factors (e.g., geographical, climatic) outweigh host attributes in shaping the fungal community of stoneflies. Using neutral and null model analyses, we also find that deterministic processes play a larger role than stochasticity in driving the fungal community assembly. However, the relative contribution of ecological processes including dispersal, drift, and selection, varied strongly with host taxonomy. Furthermore, environmental conditions also significantly affect the strength of these ecological processes. Overall, our findings illustrate that variations in host attributes and environment factors may moderate the relative influence of deterministic and stochastic processes to fungal community composition in wild stoneflies, which provides new insights into mechanisms of microbial community assembly in aquatic arthropods.
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Affiliation(s)
- Yu-Xi Zhu
- School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, 225009, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, 225009, China
| | - Qing-Bo Huo
- School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, 225009, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, 225009, China
| | - Tao Wen
- The Key Laboratory of Plant Immunity, Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving fertilizers, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xin-Yu Wang
- School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, 225009, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, 225009, China
| | - Meng-Yuan Zhao
- School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, 225009, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, 225009, China
| | - Yu-Zhou Du
- School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou, 225009, China. .,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou, 225009, China.
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8
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Enrichment of Anaerobic Microbial Communities from Midgut and Hindgut of Sun Beetle Larvae (Pachnoda marginata) on Wheat Straw: Effect of Inoculum Preparation. Microorganisms 2022; 10:microorganisms10040761. [PMID: 35456811 PMCID: PMC9024811 DOI: 10.3390/microorganisms10040761] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 03/25/2022] [Accepted: 03/28/2022] [Indexed: 12/05/2022] Open
Abstract
The Pachnoda marginata larva have complex gut microbiota capable of the effective conversion of lignocellulosic biomass. Biotechnological utilization of these microorganisms in an engineered system can be achieved by establishing enrichment cultures using a lignocellulosic substrate. We established enrichment cultures from contents of the midgut and hindgut of the beetle larva using wheat straw in an alkaline medium at mesophilic conditions. Two different inoculation preparations were used: procedure 1 (P1) was performed in a sterile bench under oxic conditions using 0.4% inoculum and small gauge needles. Procedure 2 (P2) was carried out under anoxic conditions using more inoculum (4%) and bigger gauge needles. Higher methane production was achieved with P2, while the highest acetic acid concentrations were observed with P1. In the enrichment cultures, the most abundant bacterial families were Dysgonomonadaceae, Heliobacteriaceae, Ruminococcaceae, and Marinilabiliaceae. Further, the most abundant methanogenic genera were Methanobrevibacter, Methanoculleus, and Methanosarcina. Our observations suggest that in samples processed with P1, the volatile fatty acids were not completely converted to methane. This is supported by the finding that enrichment cultures obtained with P2 included acetoclastic methanogens, which might have prevented the accumulation of acetic acid. We conclude that differences in the inoculum preparation may have a major influence on the outcome of enrichment cultures from the P. marginata larvae gut.
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9
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Qin Y, Yang J, Wu Y, Wang D, Liu X, Du M, He D, Yi N. The degradation of allyl isothiocyanate and its impact on methane production from anaerobic co-digestion of kitchen waste and waste activated sludge. BIORESOURCE TECHNOLOGY 2022; 347:126366. [PMID: 34838636 DOI: 10.1016/j.biortech.2021.126366] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/11/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
Producing methane from anaerobic co-digestion of kitchen waste and waste activated sludge has been widely implemented in real-world situations. However, the fate and impact of allyl isothiocyanate (AITC), a main active component in cruciferous vegetables, in the anaerobic co-digestion has never been documented. This study therefore aims to provide such supports. Experimental results exhibited that AITC was degraded completely by microorganisms and served as a substrate to produce methane. As AITC increased from 0 to 60 mg/L, the maximum methane production decreased from 285.1 to 35.8 mL/g VS, and the optimum digestion time was also prolonged. The mechanism study demonstrated that AITC induced cell apoptosis by modifying the physicochemical properties of cell membrane, which resulted in inhibitions to the procedure of anaerobic co-digestion. The high-throughput sequencing showed that AITC enriched the microorganism for degradation of complex organic compounds such as Bacillus, but lessened anaerobes involved in hydrolysis, acidogenesis, and methanogenesis.
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Affiliation(s)
- Yu Qin
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Jingnan Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Yanxin Wu
- College of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
| | - Xuran Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Mingting Du
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Dandan He
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Neng Yi
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
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10
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Zawierucha K, Trzebny A, Buda J, Bagshaw E, Franzetti A, Dabert M, Ambrosini R. Trophic and symbiotic links between obligate-glacier water bears (Tardigrada) and cryoconite microorganisms. PLoS One 2022; 17:e0262039. [PMID: 35020747 PMCID: PMC8754347 DOI: 10.1371/journal.pone.0262039] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 12/15/2021] [Indexed: 12/13/2022] Open
Abstract
Insights into biodiversity and trophic webs are important for understanding ecosystem functions. Although the surfaces of glaciers are one of the most productive and biologically diverse parts of the cryosphere, the links between top consumers, their diet and microbial communities are poorly understood. In this study, for the first time we investigated the relationships between bacteria, fungi and other microeukaryotes as they relate to tardigrades, microscopic metazoans that are top consumers in cryoconite, a biologically rich and productive biogenic sediment found on glacier surfaces. Using metabarcoding (16S rDNA for bacteria, ITS1 for fungi, and 18S rDNA for other microeukaryotes), we analyzed the microbial community structures of cryoconite and compared them with the community found in both fully fed and starved tardigrades. The community structure of each microbial group (bacteria, fungi, microeukaryotes) were similar within each host group (cryoconite, fully fed tardigrades and starved tardigrades), and differed significantly between groups, as indicated by redundancy analyses. The relative number of operational taxonomic units (ZOTUs, OTUs) and the Shannon index differed significantly between cryoconite and tardigrades. Species indicator analysis highlighted a group of microbial taxa typical of both fully fed and starved tardigrades (potential commensals), like the bacteria of the genera Staphylococcus and Stenotrophomonas, as well as a group of taxa typical of both cryoconite and fully fed tardigrades (likely part of the tardigrade diet; bacteria Flavobacterium sp., fungi Preussia sp., algae Trebouxiophyceae sp.). Tardigrades are consumers of bacteria, fungi and other microeukaryotes in cryoconite and, being hosts for diverse microbes, their presence can enrich the microbiome of glaciers.
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Affiliation(s)
- Krzysztof Zawierucha
- Department of Animal Taxonomy and Ecology, Adam Mickiewicz University, Poznań, Poland
| | - Artur Trzebny
- Molecular Biology Techniques Laboratory, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Jakub Buda
- Department of Animal Taxonomy and Ecology, Adam Mickiewicz University, Poznań, Poland
| | - Elizabeth Bagshaw
- School of Earth and Environmental Sciences, Cardiff University, Cardiff, United Kingdom
| | - Andrea Franzetti
- Earth and Environmental Sciences Department, University of Milano-Bicocca, Milan, Italy
| | - Miroslawa Dabert
- Molecular Biology Techniques Laboratory, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Roberto Ambrosini
- Department of Environmental Science and Policy, University of Milan, Milan, Italy
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11
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Du M, Liu X, Wang D, Yang Q, Duan A, Chen H, Liu Y, Wang Q, Ni BJ. Understanding the fate and impact of capsaicin in anaerobic co-digestion of food waste and waste activated sludge. WATER RESEARCH 2021; 188:116539. [PMID: 33125995 DOI: 10.1016/j.watres.2020.116539] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/14/2020] [Accepted: 10/19/2020] [Indexed: 06/11/2023]
Abstract
Anaerobic co-digestion is an attractive option to treat food waste and waste activated sludge, which is increasingly applied in real-world situations. As an active component in Capsicum species being substantially present in food waste in many areas, capsaicin has been recently demonstrated to inhibit the anaerobic co-digestion. However, the interaction between capsaicin and anaerobic co-digestion are still poorly understood. This work therefore aims to deeply understand the fate and impact of capsaicin in the anaerobic co-digestion. Experiment results showed that capsaicin was completely degraded in anaerobic co-digestion by hydroxylation, O-demethylation, dehydrogenation and doubly oxidization, respectively. Although methane was proven to be produced from capsaicin degradation, the increase in capsaicin concentration resulted in decrease in methane yield from the anaerobic co-digestion. With an increase of capsaicin from 2 ± 0.7 to 68 ± 4 mg/g volatile solids (VS), the maximal methane yield decreased from 274.6 ± 9.7 to 188.9 ± 8.4 mL/g VS. The mechanic investigations demonstrated that the presence of capsaicin induced apoptosis, probably by either altering key kinases or decreasing the intracellular NAD+/NADH ratio, which led to significant inhibitions to hydrolysis, acidogenesis, and methanogenesis, especially acetotrophic methanogenesis. Illumina Miseq sequencing analysis exhibited that capsaicin promoted the populations of complex organic degradation microbes such as Escherichia-Shigella and Fonticella but decreased the numbers of anaerobes relevant to hydrolysis, acidogenesis, and methanogenesis such as Bacteroide and Methanobacterium.
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Affiliation(s)
- Mingting Du
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China.
| | - Xuran Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China.
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China
| | - Abing Duan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, P.R. China.
| | - Hong Chen
- Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410004, China
| | - Yiwen Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
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12
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Cozannet M, Borrel G, Roussel E, Moalic Y, Allioux M, Sanvoisin A, Toffin L, Alain K. New Insights into the Ecology and Physiology of Methanomassiliicoccales from Terrestrial and Aquatic Environments. Microorganisms 2020; 9:E30. [PMID: 33374130 PMCID: PMC7824343 DOI: 10.3390/microorganisms9010030] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/19/2020] [Accepted: 12/21/2020] [Indexed: 12/19/2022] Open
Abstract
Members of the archaeal order Methanomassiliicoccales are methanogens mainly associated with animal digestive tracts. However, environmental members remain poorly characterized as no representatives not associated with a host have been cultivated so far. In this study, metabarcoding screening combined with quantitative PCR analyses on a collection of diverse non-host-associated environmental samples revealed that Methanomassiliicoccales were very scarce in most terrestrial and aquatic ecosystems. Relative abundance of Methanomassiliicoccales and substrates/products of methanogenesis were monitored during incubation of environmental slurries. A sediment slurry enriched in Methanomassiliicoccales was obtained from a freshwater sample. It allowed the reconstruction of a high-quality metagenome-assembled genome (MAG) corresponding to a new candidate species, for which we propose the name of Candidatus 'Methanomassiliicoccus armoricus MXMAG1'. Comparison of the annotated genome of MXMAG1 with the published genomes and MAGs from Methanomassiliicoccales belonging to the 2 known clades ('free-living'/non-host-associated environmental clade and 'host-associated'/digestive clade) allowed us to explore the putative physiological traits of Candidatus 'M. armoricus MXMAG1'. As expected, Ca. 'Methanomassiliicoccus armoricus MXMAG1' had the genetic potential to produce methane by reduction of methyl compounds and dihydrogen oxidation. This MAG encodes for several putative physiological and stress response adaptations, including biosynthesis of trehalose (osmotic and temperature regulations), agmatine production (pH regulation), and arsenic detoxication, by reduction and excretion of arsenite, a mechanism that was only present in the 'free-living' clade. An analysis of co-occurrence networks carried out on environmental samples and slurries also showed that Methanomassiliicoccales detected in terrestrial and aquatic ecosystems were strongly associated with acetate and dihydrogen producing bacteria commonly found in digestive habitats and which have been reported to form syntrophic relationships with methanogens.
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Affiliation(s)
- Marc Cozannet
- Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, IUEM, Rue Dumont d’Urville, F-29280 Plouzané, France; (M.C.); (E.R.); (Y.M.); (M.A.); (A.S.); (L.T.)
| | - Guillaume Borrel
- Unit Evolutionary Biology of the Microbial Cell, Department of Microbiology, Institute Pasteur, 75015 Paris, France;
| | - Erwan Roussel
- Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, IUEM, Rue Dumont d’Urville, F-29280 Plouzané, France; (M.C.); (E.R.); (Y.M.); (M.A.); (A.S.); (L.T.)
| | - Yann Moalic
- Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, IUEM, Rue Dumont d’Urville, F-29280 Plouzané, France; (M.C.); (E.R.); (Y.M.); (M.A.); (A.S.); (L.T.)
| | - Maxime Allioux
- Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, IUEM, Rue Dumont d’Urville, F-29280 Plouzané, France; (M.C.); (E.R.); (Y.M.); (M.A.); (A.S.); (L.T.)
| | - Amandine Sanvoisin
- Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, IUEM, Rue Dumont d’Urville, F-29280 Plouzané, France; (M.C.); (E.R.); (Y.M.); (M.A.); (A.S.); (L.T.)
| | - Laurent Toffin
- Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, IUEM, Rue Dumont d’Urville, F-29280 Plouzané, France; (M.C.); (E.R.); (Y.M.); (M.A.); (A.S.); (L.T.)
| | - Karine Alain
- Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, IUEM, Rue Dumont d’Urville, F-29280 Plouzané, France; (M.C.); (E.R.); (Y.M.); (M.A.); (A.S.); (L.T.)
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13
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Insects' potential: Understanding the functional role of their gut microbiome. J Pharm Biomed Anal 2020; 194:113787. [PMID: 33272789 DOI: 10.1016/j.jpba.2020.113787] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 11/13/2020] [Accepted: 11/17/2020] [Indexed: 12/17/2022]
Abstract
The study of insect-associated microbial communities is a field of great importance in agriculture, principally because of the role insects play as pests. In addition, there is a recent focus on the potential of the insect gut microbiome in areas such as biotechnology, given some microorganisms produce molecules with biotechnological and industrial applications, and also in biomedicine, since some bacteria and fungi are a reservoir of antibiotic resistance genes (ARGs). To date, most studies aiming to characterize the role of the gut microbiome of insects have been based on high-throughput sequencing of the 16S rRNA gene and/or metagenomics. However, recently functional approaches such as metatranscriptomics, metaproteomics and metabolomics have also been employed. Besides providing knowledge about the taxonomic distribution of microbial populations, these techniques also reveal their functional and metabolic capabilities. This information is essential to gain a better understanding of the role played by microbes comprising the microbial communities in their hosts, as well as to indicate their possible exploitation. This review provides an overview of how far we have come in characterizing insect gut functionality through omics, as well as the challenges and future perspectives in this field.
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14
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Zawierucha K, Porazinska DL, Ficetola GF, Ambrosini R, Baccolo G, Buda J, Ceballos JL, Devetter M, Dial R, Franzetti A, Fuglewicz U, Gielly L, Łokas E, Janko K, Novotna Jaromerska T, Kościński A, Kozłowska A, Ono M, Parnikoza I, Pittino F, Poniecka E, Sommers P, Schmidt SK, Shain D, Sikorska S, Uetake J, Takeuchi N. A hole in the nematosphere: tardigrades and rotifers dominate the cryoconite hole environment, whereas nematodes are missing. J Zool (1987) 2020. [DOI: 10.1111/jzo.12832] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- K. Zawierucha
- Department of Animal Taxonomy and Ecology Adam Mickiewicz University Poznań Poland
| | - D. L. Porazinska
- Department of Entomology and Nematology University of Florida Gainesville FL USA
| | - G. F. Ficetola
- Department of Environmental Science and Policy University of Milan Milan Italy
- Laboratoire d'Ecologie Alpine University Grenoble Alpes Univ. Savoie Mont Blanc CNRS LECA Grenoble France
| | - R. Ambrosini
- Department of Environmental Science and Policy University of Milan Milan Italy
| | - G. Baccolo
- Earth and Environmental Sciences Department University of Milano‐Bicocca Milan Italy
| | - J. Buda
- Department of Animal Taxonomy and Ecology Adam Mickiewicz University Poznań Poland
| | - J. L. Ceballos
- Institute of Hydrology, Meteorology and Environmental Studies IDEAM Bogota' Colombia
| | - M. Devetter
- Institute of soil Biology Biology Centre CAS České Budějovice Czech Republic
- Centre for Polar Ecology Faculty of Science University of South Bohemia České Budějovice Czech Republic
| | - R. Dial
- Institute of Culture and the Environment Alaska Pacific University Anchorage AK USA
| | - A. Franzetti
- Earth and Environmental Sciences Department University of Milano‐Bicocca Milan Italy
| | | | - L. Gielly
- Laboratoire d'Ecologie Alpine University Grenoble Alpes Univ. Savoie Mont Blanc CNRS LECA Grenoble France
| | - E. Łokas
- Department of Mass Spectroscopy Institute of Nuclear Physics Polish Academy of Sciences Kraków Poland
| | - K. Janko
- Laboratory of Fish Genetics Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic Libechov Czech Republic
- Department of Biology and Ecology Faculty of Science University of Ostrava Ostrava Czech Republic
| | | | | | - A. Kozłowska
- Department of Animal Taxonomy and Ecology Adam Mickiewicz University Poznań Poland
| | - M. Ono
- Graduate School of Science and Engineering Chiba University Chiba Japan
| | - I. Parnikoza
- State Institution National Antarctic Center of Ministry of Education and Science of Ukraine Kyiv Ukraine
- Institute of Molecular Biology and Genetics National Academy of Sciences of Ukraine Kyiv Ukraine
| | - F. Pittino
- Earth and Environmental Sciences Department University of Milano‐Bicocca Milan Italy
| | - E. Poniecka
- School of Earth and Ocean Sciences Cardiff University Cardiff UK
| | - P. Sommers
- Ecology and Evolutionary Biology Department University of Colorado Boulder CO USA
| | - S. K. Schmidt
- Ecology and Evolutionary Biology Department University of Colorado Boulder CO USA
| | - D. Shain
- Biology Department Rutgers, The State University of New Jersey Camden NJ USA
| | - S. Sikorska
- Department of Animal Taxonomy and Ecology Adam Mickiewicz University Poznań Poland
| | - J. Uetake
- The Arctic Environment Research Center National Institute of Polar Research Tachikawa Japan
| | - N. Takeuchi
- Department of Earth Sciences Graduate School of Science Chiba University Chiba Japan
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15
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Khamis FM, Ombura FLO, Akutse KS, Subramanian S, Mohamed SA, Fiaboe KKM, Saijuntha W, Van Loon JJA, Dicke M, Dubois T, Ekesi S, Tanga CM. Insights in the Global Genetics and Gut Microbiome of Black Soldier Fly, Hermetia illucens: Implications for Animal Feed Safety Control. Front Microbiol 2020; 11:1538. [PMID: 32774330 PMCID: PMC7381391 DOI: 10.3389/fmicb.2020.01538] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/12/2020] [Indexed: 01/04/2023] Open
Abstract
The utilization of the black soldier fly (BSF) Hermetia illucens L. for recycling organic waste into high-quality protein and fat biomass for animal feeds has gained momentum worldwide. However, information on the genetic diversity and environmental implications on safety of the larvae is limited. This study delineates genetic variability and unravels gut microbiome complex of wild-collected and domesticated BSF populations from six continents using mitochondrial COI gene and 16S metagenomics. All sequences generated from the study linked to H. illucens accessions KM967419.1, FJ794355.1, FJ794361.1, FJ794367.1, KC192965.1, and KY817115.1 from GenBank. Phylogenetic analyses of the sequences generated from the study and rooted by GenBank accessions of Hermetia albitarsis Fabricius and Hermetia sexmaculata Macquart separated all samples into three branches, with H. illucens and H. sexmaculata being closely related. Genetic distances between H. illucens samples from the study and GenBank accessions of H. illucens ranged between 0.0091 and 0.0407 while H. sexmaculata and H. albitarsis samples clearly separated from all H. illucens by distances of 0.1745 and 0.1903, respectively. Genetic distance matrix was used to generate a principal coordinate plot that further confirmed the phylogenetic clustering. Haplotype network map demonstrated that Australia, United States 1 (Rhode Island), United States 2 (Colorado), Kenya, and China shared a haplotype, while Uganda shared a haplotype with GenBank accession KC192965 BSF from United States. All other samples analyzed had individual haplotypes. Out of 481,695 reads analyzed from 16S metagenomics, four bacterial families (Enterobactereaceae, Dysgonomonadaceae, Wohlfahrtiimonadaceae, and Enterococcaceae) were most abundant in the BSF samples. Alpha-diversity, as assessed by Shannon index, showed that the Kenyan and Thailand populations had the highest and lowest microbe diversity, respectively; while microbial diversity assessed through Bray Curtis distance showed United States 3 (Maysville) and Netherlands populations to be the most dissimilar. Our findings on genetic diversity revealed slight phylogeographic variation between BSF populations across the globe. The 16S data depicted larval gut bacterial families with economically important genera that might pose health risks to both animals and humans. This study recommends pre-treatment of feedstocks and postharvest measures of the harvested BSF larvae to minimize risk of pathogen contamination along the insect-based feed value chain.
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Affiliation(s)
- Fathiya M. Khamis
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
| | - Fidelis L. O. Ombura
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
| | - Komivi S. Akutse
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
| | - Sevgan Subramanian
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
| | - Samira A. Mohamed
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
| | - Komi K. M. Fiaboe
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
- Department of Integrated Pest Management, International Institute of Tropical Agriculture, Yaounde, Cameroon
| | - Weerachai Saijuntha
- Walai Rukhavej Botanical Research Institute (WRBRI), Biodiversity and Conservation Research Unit, Mahasarakham University, Maha Sarakham, Thailand
| | - Joop J. A. Van Loon
- Laboratory of Entomology, Plant Sciences Group, Wageningen University, Wageningen, Netherlands
| | - Marcel Dicke
- Laboratory of Entomology, Plant Sciences Group, Wageningen University, Wageningen, Netherlands
| | - Thomas Dubois
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
| | - Sunday Ekesi
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
| | - Chrysantus M. Tanga
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
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16
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Murakami T, Onouchi S, Igai K, Ohkuma M, Hongoh Y. Ectosymbiotic bacterial microbiota densely colonize the surface of thelastomatid nematodes in the gut of the wood-feeding cockroach Panesthia angustipennis. FEMS Microbiol Ecol 2019; 95:5250881. [PMID: 30561598 DOI: 10.1093/femsec/fiy238] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 12/14/2018] [Indexed: 12/30/2022] Open
Abstract
Cockroaches generally harbor thelastomatid nematodes (pinworms) in their gut. In this study, we discovered that the surfaces of two undescribed thelastomatid species in the hindgut of the wood-feeding cockroach Panesthia angustipennis were consistently and densely colonized by bacteria. Epifluorescence microscopy using 4',6-diamidino-2-phenylindole and transmission electron microscopy revealed that several distinct morphotypes of bacteria covered almost the entire body surface of the nematodes in single or multiple layers. Sequencing analysis of 16S rRNA amplicons of either entire nematodes or sections of nematode body surfaces indicated that the associated bacterial microbiota consisted of several dominant phylotypes belonging to either Dysgonomonadaceae (Bacteroidales termite cluster V), Rikennellaceae or Ruminococcaceae. These phylotypes formed clades with sequences previously obtained from cockroach and/or termite guts. Comparisons of the bacterial community structure of the entire cockroach hindgut microbiota vs the nematode-associated microbiota suggested that these dominant bacterial phylotypes preferentially colonized the nematode surface. The two nematode species shared most of the dominant bacterial phylotypes, but the bacterial community structures differed significantly. Colonization by five predominant phylotypes was confirmed by fluorescence in situ hybridization analysis using phylotype-specific probes. Our study provides fundamental information on this previously unknown ectosymbiosis between gut bacteria and thelastomatid pinworms.
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Affiliation(s)
- Takumi Murakami
- School of Life Science and Technology, Tokyo Institute of Technology, 2-12-1-W3-48 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.,Center for Information Biology, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Shu Onouchi
- School of Life Science and Technology, Tokyo Institute of Technology, 2-12-1-W3-48 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Katsura Igai
- School of Life Science and Technology, Tokyo Institute of Technology, 2-12-1-W3-48 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Moriya Ohkuma
- Japan Collection of Microorganisms, RIKEN BioResource Research Center, 3-1-1 Koyada, Tsukuba, Ibaraki 305-0074, Japan
| | - Yuichi Hongoh
- School of Life Science and Technology, Tokyo Institute of Technology, 2-12-1-W3-48 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.,Japan Collection of Microorganisms, RIKEN BioResource Research Center, 3-1-1 Koyada, Tsukuba, Ibaraki 305-0074, Japan
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17
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Ren Z, Martyniuk N, Oleksy IA, Swain A, Hotaling S. Ecological Stoichiometry of the Mountain Cryosphere. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00360] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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