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He T, Bao J, Leng Y, Snow D, Kong S, Wang T, Li X. Biotransformation of doxycycline by Brevundimonas naejangsanensis and Sphingobacterium mizutaii strains. JOURNAL OF HAZARDOUS MATERIALS 2021; 411:125126. [PMID: 33486232 DOI: 10.1016/j.jhazmat.2021.125126] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 01/06/2021] [Accepted: 01/08/2021] [Indexed: 06/12/2023]
Abstract
The fate of doxycycline (DC), a second generation tetracycline antibiotic, in the environment has drawn increasing attention in recent years due to its wide usage. Little is known about the biodegradability of DC in the environment. The objective of this study was to characterize the biotransformation of DC by pure bacterial strains with respect to reaction kinetics under different environmental conditions and biotransformation products. Two bacterial strains, Brevundimonas naejangsanensis DD1 and Sphingobacterium mizutaii DD2, were isolated from chicken litter and characterized for their biotransformation capability of DC. Results show both strains rely on cometabolism to biotransform DC with tryptone as primary growth substrate. DD2 had higher biotransformation kinetics than DD1. The two strains prefer similar pHs (7 and 8) and temperature (30 °C), however, they exhibited opposite responses to increasing background tryptone concentration. While hydrolysis converted DC to its isomer or epimer, the two bacterial strains converted DC to various biotransformation products through a series of demethylation, dehydration, decarbonylation and deamination. Findings from the study can be used to better predict the fate of DC in the environment.
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Affiliation(s)
- Ting He
- School of Environmental Studies, China University of Geosciences, No. 388 Lumo Road, Wuhan, Hubei 430074, China; Department of Civil and Environmental Engineering, University of Nebraska-Lincoln, 900 N 16th St., W150D Nebraska Hall, Lincoln, NE 68588-0531, USA
| | - Jianguo Bao
- School of Environmental Studies, China University of Geosciences, No. 388 Lumo Road, Wuhan, Hubei 430074, China.
| | - Yifei Leng
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China
| | - Daniel Snow
- Water Sciences Laboratory, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Shuqiong Kong
- School of Environmental Studies, China University of Geosciences, No. 388 Lumo Road, Wuhan, Hubei 430074, China
| | - Tong Wang
- School of Environmental Studies, China University of Geosciences, No. 388 Lumo Road, Wuhan, Hubei 430074, China
| | - Xu Li
- Department of Civil and Environmental Engineering, University of Nebraska-Lincoln, 900 N 16th St., W150D Nebraska Hall, Lincoln, NE 68588-0531, USA.
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Jin L, Huang Y, Yang S, Wu D, Li C, Deng W, Zhao K, He Y, Li B, Zhang G, Xiong Y, Wei R, Li G, Wu H, Zhang H, Zou L. Diet, habitat environment and lifestyle conversion affect the gut microbiomes of giant pandas. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 770:145316. [PMID: 33517011 DOI: 10.1016/j.scitotenv.2021.145316] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 01/02/2021] [Accepted: 01/16/2021] [Indexed: 06/12/2023]
Abstract
Gut microbiota (GM) are important for the health of giant pandas (GPs), in addition to the utilization of bamboo in their diets. However, it is not fully understood how diet, habitat environment and lifestyle contribute to the composition of GM in GP. Consequently, we evaluated how dietary changes, habitat environment conversions and lifestyle shifts influence the GM of GPs using high-throughput sequencing and genome-resolved metagenomics. The GM of GPs were more similar when their hosts exhibited the same diet. High fiber diets significantly increased the diversity and decreased the richness of gut bacterial communities alone or interacted with the age factor (p < 0.05). The abundances of Streptococcus, Pseudomonas, Enterococcus, Lactococcus, Acinetobacter, and Clostridium significantly increased during diet conversion process (Non-parametric factorial Kruskal-Wallis sum-rank test, LDA > 4). Reconstruction of 60 metagenome-assembled-genomes (MAGs) indicated that these bacteria were likely responsible for bamboo digestion via gene complements involved in cellulose, hemicellulose, and lignin degradation. While habitat environment may play a more important role in shaping the GM of GP, lifestyle can also greatly affect bacterial communities. The GM structure in reintroduced GPs notably converged to that of wild pandas. Importantly, the main bacterial genera of wild GPs could aid in lignin degradation, while those of reintroduced GPs were related to cellulose and hemicellulose digestion. Streptococcus, Pseudomonas, Enterococcus, Lactococcus, Acinetobacter, and Clostridium may contribute to lignocellulose digestion in GP. The results revealed that diet conversion, habitat environment and lifestyle could remarkably influence the GM of GP. In addition, results suggested that increasing the ability of lignin degradation with GM may aid to change the GM of reintroduced pandas to resemble those of wild pandas.
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Affiliation(s)
- Lei Jin
- College of Resources, Sichuan Agricultural University, Chengdu, China
| | - Yan Huang
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Shengzhi Yang
- College of Resources, Sichuan Agricultural University, Chengdu, China
| | - Daifu Wu
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Caiwu Li
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Wenwen Deng
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Ke Zhao
- College of Resources, Sichuan Agricultural University, Chengdu, China
| | - Yongguo He
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Bei Li
- College of Resources, Sichuan Agricultural University, Chengdu, China
| | - Guiquan Zhang
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Yaowu Xiong
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Rongping Wei
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Guo Li
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Hongning Wu
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Hemin Zhang
- Key Laboratory of State Forestry and Grassland Administration (SFGA) on Conservation Biology of Rare Animals in the Giant Panda National Park, the China Conservation and Research Center for the Giant Panda (CCRCGP), Chengdu, China
| | - Likou Zou
- College of Resources, Sichuan Agricultural University, Chengdu, China.
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Assessment of Chlorella sorokiniana Growth in Anaerobic Digester Effluent. PLANTS 2021; 10:plants10030478. [PMID: 33802500 PMCID: PMC7999815 DOI: 10.3390/plants10030478] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 02/19/2021] [Accepted: 02/23/2021] [Indexed: 01/23/2023]
Abstract
Microalgae are considered a potential source of valuable compounds for multiple purposes and are potential agents for bioremediation of aquatic environments contaminated with different pollutants. This work evaluates the use of agricultural waste, unsterilized and anaerobically digested, to produce biomass from a strain of Chlorella sorokiniana. Furthermore, the presence of bacteria in these wastes was investigated based on the bacterial 16S rRNA gene sequencing. The results showed a specific growth rate ranging between 0.82 and 1.45 day−1, while the final biomass yield in different digestate-containing treatments (bacterial-contaminated cultures) ranged between 0.33 and 0.50 g L−1 day−1. Besides, substantial amounts of ammonium, phosphate, and sulfate were consumed by C. sorokiniana during the experimental period. The predominant bacteria that grew in the presence of C. sorokiniana in the effluent-containing treatments belonged to the genera Chryseobacterium, Flavobacterium, Sphingomonas, Brevundimonas, Hydrogenophaga, Sphingobacterium, and Pseudomonas. Therefore, this microalga can tolerate and grow in the presence of other microorganisms. Finally, these results show that anaerobically digested agricultural waste materials are a good substitute for growth media for green microalgae; however, phosphate and sulfate levels must also be controlled in the media to maintain adequate growth of microalgae.
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Verma S, Singh D, Chatterjee S. Biodegradation of organophosphorus pesticide chlorpyrifos by Sphingobacterium sp. C1B, a psychrotolerant bacterium isolated from apple orchard in Himachal Pradesh of India. Extremophiles 2020; 24:897-908. [DOI: 10.1007/s00792-020-01203-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 09/14/2020] [Indexed: 01/27/2023]
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Mikolasch A, Reinhard A, Alimbetova A, Omirbekova A, Pasler L, Schumann P, Kabisch J, Mukasheva T, Schauer F. From oil spills to barley growth - oil-degrading soil bacteria and their promoting effects. J Basic Microbiol 2016; 56:1252-1273. [PMID: 27624187 DOI: 10.1002/jobm.201600300] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 08/06/2016] [Indexed: 12/30/2022]
Abstract
Heavy contamination of soils by crude oil is omnipresent in areas of oil recovery and exploitation. Bioremediation by indigenous plants in cooperation with hydrocarbon degrading microorganisms is an economically and ecologically feasible means to reclaim contaminated soils. To study the effects of indigenous soil bacteria capable of utilizing oil hydrocarbons on biomass production of plants growing in oil-contaminated soils eight bacterial strains were isolated from contaminated soils in Kazakhstan and characterized for their abilities to degrade oil components. Four of them, identified as species of Gordonia and Rhodococcus turned out to be effective degraders. They produced a variety of organic acids from oil components, of which 59 were identified and 7 of them are hitherto unknown acidic oil metabolites. One of them, Rhodococcus erythropolis SBUG 2054, utilized more than 140 oil components. Inoculating barley seeds together with different combinations of these bacterial strains restored normal growth of the plants on contaminated soils, demonstrating the power of this approach for bioremediation. Furthermore, we suggest that the plant promoting effect of these bacteria is not only due to the elimination of toxic oil hydrocarbons but possibly also to the accumulation of a variety of organic acids which modulate the barley's rhizosphere environment.
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Affiliation(s)
- Annett Mikolasch
- Department of Applied Microbiology, Institute of Microbiology, University Greifswald, Greifswald, Germany
| | - Anne Reinhard
- Department of Applied Microbiology, Institute of Microbiology, University Greifswald, Greifswald, Germany
| | - Anna Alimbetova
- Department of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| | - Anel Omirbekova
- Department of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| | - Lisa Pasler
- Department of Applied Microbiology, Institute of Microbiology, University Greifswald, Greifswald, Germany
| | - Peter Schumann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Johannes Kabisch
- Institute of Biochemistry, University Greifswald, 17487, Greifswald, Germany
| | - Togzhan Mukasheva
- Department of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| | - Frieder Schauer
- Department of Applied Microbiology, Institute of Microbiology, University Greifswald, Greifswald, Germany
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