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Mota VT, Delforno TP, Ribeiro JC, Zaiat M, Oliveira VMD. Understanding microbiome dynamics and functional responses during acidogenic fermentation of sucrose and sugarcane vinasse through metatranscriptomic analysis. Environ Res 2024; 246:118150. [PMID: 38218518 DOI: 10.1016/j.envres.2024.118150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/20/2023] [Accepted: 01/05/2024] [Indexed: 01/15/2024]
Abstract
Improving anaerobic digestion of sugarcane vinasse - a high-strength wastewater from ethanol distillation - is a subject of great interest, in view of the reduction of the pollutants and recovery of methane and valuable metabolites as byproducts. Through metatranscriptomic analysis, this study evaluated the active microbiome and metabolic pathways in a continuous acidogenic reactor: Stage 1S (control): 100% sucrose-based substrate (SBS); Stage 2SV (acclimation): 50% SBS and 50% vinasse; Stage 3V: 100% vinasse. Metatranscriptome obtained from each Stage was subjected to taxonomic and functional annotations. Under SBS feeding, pH dropped to pH 2.7 and biohydrogen production was observed. As vinasse was added, pH increased to 4.1-4.5, resulting in community structure and metabolite changes. In Stage 3V, biohydrogen production ceased, and propionate and acetate prevailed among the volatile fatty acids. Release of homoacetogenesis enzymes by Clostridium ljungdahlii and of uptake hydrogenase (EC 1.12.99.6) by Pectinatus frisingensis were linked to hydrogen consumption in Stages 2SV and 3V. Metabolic pathways of vinasse compounds, such as carbohydrates, malate, oxalate, glycerol, sulfate and phenol, were investigated in detail. In pyruvate metabolism, gene transcripts of oadA (oxaloacetate decarboxylase) and mdh (malate dehydrogenase), were upregulated in Stage 3V, being mostly attributed to P. frisingensis. Acetate formation from vinasse degradation was mainly attributed to Megasphaera and Clostridium, and propionate formation to P. frisingensis. Glycerol removal from vinasse exceeded 99%, and gene transcripts encoding for glpF (glycerol uptake facilitator protein), glpK (glycerol kinase) and glpABC (glycerol-3-phosphate dehydrogenase) were expressed mostly by Pectinatus and Prevotella. mRNA profiling showed that active bacteria and gene expression greatly changed when vinasse replaced sucrose, and Pectinatus was the main active bacterium degrading the searched compounds from vinasse. The identification of the main metabolic routes and the associated microorganisms achieved in this work contributes with valuable information to support further optimization of fermentation towards the desired metabolites.
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Affiliation(s)
- Vera T Mota
- Research Center for Chemistry, Biology and Agriculture Research, University of Campinas (CPQBA/Unicamp), Paulínia, SP, Brazil.
| | - Tiago P Delforno
- SENAI Innovation Institute for Biotechnology, São Paulo, SP, Brazil
| | - Jaqueline C Ribeiro
- Biological Processes Laboratory, São Carlos School of Engineering, University of São Paulo (LPB/EESC/USP), São Carlos, SP, Brazil
| | - Marcelo Zaiat
- Biological Processes Laboratory, São Carlos School of Engineering, University of São Paulo (LPB/EESC/USP), São Carlos, SP, Brazil
| | - Valéria M de Oliveira
- Research Center for Chemistry, Biology and Agriculture Research, University of Campinas (CPQBA/Unicamp), Paulínia, SP, Brazil
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Camacho KF, de Melo Carlos L, Bernal SPF, de Oliveira VM, Ruiz JLM, Ottoni JR, Vieira R, Neto A, Rosa LH, Passarini MRZ. Antarctic marine sediment as a source of filamentous fungi-derived antimicrobial and antitumor compounds of pharmaceutical interest. Extremophiles 2024; 28:21. [PMID: 38532228 DOI: 10.1007/s00792-024-01339-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 03/07/2024] [Indexed: 03/28/2024]
Abstract
Antarctica harbors a microbial diversity still poorly explored and of inestimable biotechnological value. Cold-adapted microorganisms can produce a diverse range of metabolites stable at low temperatures, making these compounds industrially interesting for biotechnological use. The present work investigated the biotechnological potential for antimicrobial and antitumor activity of filamentous fungi and bacteria isolated from marine sediment samples collected at Deception Island, Antarctica. A total of 89 microbial isolates were recovered from marine sediments and submitted to an initial screening for L-glutaminase with antitumoral activity and for antimicrobial metabolites. The isolates Pseudogymnoascus sp. FDG01, Pseudogymnoascus sp. FDG02, and Penicillium sp. FAD33 showed potential antiproliferative action against human pancreatic carcinoma cells while showing no toxic effect on non-tumor cells. The microbial extracts from unidentified three bacteria and four filamentous fungi showed antibacterial activity against at least one tested pathogenic bacterial strain. The isolate FDG01 inhibited four bacterial species, while the isolate FDG01 was active against Micrococcus luteus in the minimal inhibitory concentration of 0.015625 μg mL -1. The results pave the way for further optimization of enzyme production and characterization of enzymes and metabolites found and reaffirm Antarctic marine environments as a wealthy source of compounds potentially applicable in the healthcare and pharmaceutical industry.
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Affiliation(s)
- Karine Fernandes Camacho
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Foz Do Iguaçu, PR, 85870-650, Brazil
| | - Layssa de Melo Carlos
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Foz Do Iguaçu, PR, 85870-650, Brazil
| | - Suzan Prado Fernandes Bernal
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Foz Do Iguaçu, PR, 85870-650, Brazil
| | | | - Jorge Luiz Maria Ruiz
- Laboratório de Biotecnologia da Saúde, Universidade Federal da Integração Latino-Integração Latino-Americana - UNILA, Foz Do Iguaçu, PR, 85870-650, Brazil
| | - Júlia Ronzella Ottoni
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Foz Do Iguaçu, PR, 85870-650, Brazil
| | - Rosemary Vieira
- Instituto de Geociências, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Arthur Neto
- Instituto de Geociências, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Luiz Henrique Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Michel Rodrigo Zambrano Passarini
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Foz Do Iguaçu, PR, 85870-650, Brazil.
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de Melo Carlos L, Camacho KF, Duarte AW, de Oliveira VM, Boroski M, Rosa LH, Vieira R, Neto AA, Ottoni JR, Passarini MRZ. Bioprospecting the potential of the microbial community associated to Antarctic marine sediments for hydrocarbon bioremediation. Braz J Microbiol 2024; 55:471-485. [PMID: 38052770 PMCID: PMC10920520 DOI: 10.1007/s42770-023-01199-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/27/2023] [Indexed: 12/07/2023] Open
Abstract
Microorganisms that inhabit the cold Antarctic environment can produce ligninolytic enzymes potentially useful in bioremediation. Our study focused on characterizing Antarctic bacteria and fungi from marine sediment samples of King George and Deception Islands, maritime Antarctica, potentially affected by hydrocarbon influence, able to produce enzymes for use in bioremediation processes in environments impacted with petroleum derivatives. A total of 168 microorganism isolates were obtained: 56 from sediments of King George Island and 112 from Deception Island. Among them, five bacterial isolates were tolerant to cell growth in the presence of diesel oil and gasoline and seven fungal were able to discolor RBBR dye. In addition, 16 isolates (15 bacterial and one fungal) displayed enzymatic emulsifying activities. Two isolates were characterized taxonomically by showing better biotechnological results. Psychrobacter sp. BAD17 and Cladosporium sp. FAR18 showed pyrene tolerance (cell growth of 0.03 g mL-1 and 0.2 g mL-1) and laccase enzymatic activity (0.006 UL-1 and 0.10 UL-1), respectively. Our results indicate that bacteria and fungi living in sediments under potential effect of hydrocarbon pollution may represent a promising alternative to bioremediate cold environments contaminated with polluting compounds derived from petroleum such as polycyclic aromatic hydrocarbons and dyes.
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Affiliation(s)
- Layssa de Melo Carlos
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil
| | - Karine Fernandes Camacho
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil
| | | | | | - Marcela Boroski
- Programa de Pós-Graduação Em Energia & Sustentabilidade, Universidade Federal da Integração Latino-Americana - UNILA, Foz Do Iguaçu, Brazil
| | - Luiz Henrique Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Rosemary Vieira
- Instituto de Geociências, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Arthur A Neto
- Instituto de Geociências, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Júlia Ronzella Ottoni
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil
| | - Michel R Z Passarini
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil.
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Bernabé TN, de Omena PM, Santos VPD, de Siqueira VM, de Oliveira VM, Romero GQ. Warming weakens facilitative interactions between decomposers and detritivores, and modifies freshwater ecosystem functioning. Glob Chang Biol 2018; 24:3170-3186. [PMID: 29485732 DOI: 10.1111/gcb.14109] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 01/23/2018] [Indexed: 06/08/2023]
Abstract
Warming is among the major drivers of changes in biotic interactions and, in turn, ecosystem functioning. The decomposition process occurs in a chain of facilitative interactions between detritivores and microorganisms. It remains unclear, however, what effect warming may have on the interrelations between detritivores and microorganisms, and the consequences for the functioning of natural freshwater ecosystems. To address these gaps, we performed a field experiment using tank bromeliads and their associated aquatic fauna. We manipulated the presence of bacteria and detritivorous macroinvertebrates (control, "bacteria," and "bacteria + macroinvertebrates") under ambient and warming scenarios, and analyzed the effects on the microorganisms and ecosystem functioning (detritus mass loss, colored dissolved organic matter, and nitrogen flux). We applied antibiotic solution to eliminate or reduce bacteria from control bromeliads. After 60 days incubation, bacterial density was higher in the presence than in the absence of macroinvertebrates. In the absence of macroinvertebrates, temperature did not influence bacterial density. However, in the presence of macroinvertebrates, bacterial density decreased by 54% with warming. The magnitude of the effects of organisms on ecosystem functioning was higher in the combined presence of bacteria and macroinvertebrates. However, warming reduced the overall positive effects of detritivores on bacterial density, which in turn, cascaded down to ecosystem functioning by decreasing decomposition and nitrogen flux. These results show the existence of facilitative mechanisms between bacteria and detritivores in the decomposition process, which might collapse due to warming. Detritivores seem to contribute to nutrient cycling as they facilitate bacterial populations, probably by increasing nutrient input (feces) in the ecosystem. However, increased temperature mitigated these beneficial effects. Our results add to a growing research body that shows that warming can affect the structure of aquatic communities, and highlight the importance of considering the interactive effects between facilitation and climatic drivers on the functioning of freshwater ecosystems.
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Affiliation(s)
- Tiago N Bernabé
- Pós-Graduação em Biologia Animal, Universidade Estadual Paulista "Júlio de Mesquita Filho", São José do Rio Preto, SP, Brasil
- Laboratory of Multitrophic Interactions and Biodiversity (LIMBIO), Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Paula M de Omena
- Laboratory of Multitrophic Interactions and Biodiversity (LIMBIO), Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Viviane Piccin Dos Santos
- Microbial Resources Division, Research Center for Chemistry, Biology and Agriculture (CPQBA), University of Campinas (UNICAMP), Campinas, Brazil
| | - Virgínia M de Siqueira
- Microbial Resources Division, Research Center for Chemistry, Biology and Agriculture (CPQBA), University of Campinas (UNICAMP), Campinas, Brazil
| | - Valéria M de Oliveira
- Microbial Resources Division, Research Center for Chemistry, Biology and Agriculture (CPQBA), University of Campinas (UNICAMP), Campinas, Brazil
| | - Gustavo Q Romero
- Laboratory of Multitrophic Interactions and Biodiversity (LIMBIO), Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
- Brazilian Research Network on Climate Change (Rede Clima), São Paulo, Brazil
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da Fonseca FSA, Angolini CFF, Arruda MAZ, Junior CAL, Santos CA, Saraiva AM, Pilau E, Souza AP, Laborda PR, de Oliveira PFL, de Oliveira VM, Reis FDAM, Marsaioli AJ. Identification of oxidoreductases from the petroleum Bacillus safensis strain. ACTA ACUST UNITED AC 2015; 8:152-159. [PMID: 28352585 PMCID: PMC4980753 DOI: 10.1016/j.btre.2015.09.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 08/25/2015] [Accepted: 09/02/2015] [Indexed: 10/31/2022]
Abstract
A gram-positive bacterium, denominated CFA-06, was isolated from Brazilian petroleum in the Campos Basin and is responsible for the degradation of aromatic compounds and petroleum aromatic fractions. The CFA-06 strain was identified as Bacillus safensis using the 16S rRNA and gyrase B sequence. Enzymatic assays revealed the presence of two oxidoreductases: a catalase and a new oxidoreductase. The oxidoreductases were enzymatically digested and analyzed via ESI-LTQ-Orbitrap mass spectrometry. The mass data revealed a novel oxidoreductase (named BsPMO) containing 224 amino acids and 89% homology with a hypothetic protein from B. safensis (CFA-06) and a catalase (named BsCat) with 491 amino acids and 60% similarity with the catalase from Bacillus pumilus (SAFR-032). The new protein BsPMO contains iron atom(s) and shows catalytic activity toward a monooxygenase fluorogenic probe in the presence of cofactors (NADH, NADPH and NAD). This study enhances our knowledge of the biodegradation process of petroleum by B. safensis.
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Affiliation(s)
- Francine S A da Fonseca
- Chemistry Institute, University of Campinas, P.B 6154, 13083-970 Campinas, São Paulo, Brazil; Institute of Agricultural Sciences, Federal University of Minas Gerais, 39404-547 Minas Gerais, Brazil
| | - Célio F F Angolini
- Chemistry Institute, University of Campinas, P.B 6154, 13083-970 Campinas, São Paulo, Brazil
| | - Marco A Zezzi Arruda
- Chemistry Institute, University of Campinas, P.B 6154, 13083-970 Campinas, São Paulo, Brazil
| | - Cícero A L Junior
- Chemistry Institute, University of Campinas, P.B 6154, 13083-970 Campinas, São Paulo, Brazil
| | - Clelton A Santos
- Center for Molecular Biology and Genetic Engineering, University of Campinas, 13083-875 São Paulo, Brazil
| | - Antonio M Saraiva
- Chemistry Institute, University of Campinas, P.B 6154, 13083-970 Campinas, São Paulo, Brazil; National Institute of Metrology, Quality and Technology - INMETRO, Xerém, Rio de Janeiro, Brazil
| | - Eduardo Pilau
- Chemistry Institute, University of Campinas, P.B 6154, 13083-970 Campinas, São Paulo, Brazil
| | - Anete P Souza
- Center for Molecular Biology and Genetic Engineering, University of Campinas, 13083-875 São Paulo, Brazil
| | - Prianda R Laborda
- Center for Molecular Biology and Genetic Engineering, University of Campinas, 13083-875 São Paulo, Brazil
| | - Patrícia F L de Oliveira
- Microbial Resources Division, Research Center for Chemistry, Biology and Agriculture (CPQBA), University of Campinas, CP 6171, CEP 13081-970, Campinas, SP, Brazil
| | - Valéria M de Oliveira
- Microbial Resources Division, Research Center for Chemistry, Biology and Agriculture (CPQBA), University of Campinas, CP 6171, CEP 13081-970, Campinas, SP, Brazil
| | | | - Anita J Marsaioli
- Chemistry Institute, University of Campinas, P.B 6154, 13083-970 Campinas, São Paulo, Brazil
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Angolini CFF, Pilau EJ, Lopes-Oliveira PF, Garcia INS, Gozzo FC, Oliveira VMD, Marsaioli AJ. Classification and Identification of Petroleum Microorganisms by MALDI-TOF Mass Spectrometry. J BRAZIL CHEM SOC 2015. [DOI: 10.5935/0103-5053.20150004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Passarini MRZ, Miqueletto PB, de Oliveira VM, Sette LD. Molecular diversity of fungal and bacterial communities in the marine sponge Dragmacidon reticulatum. J Basic Microbiol 2014; 55:207-20. [PMID: 25213208 DOI: 10.1002/jobm.201400466] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 08/05/2014] [Indexed: 12/16/2022]
Abstract
The present work aimed to investigate the diversity of bacteria and filamentous fungi of southern Atlantic Ocean marine sponge Dragmacidon reticulatum using cultivation-independent approaches. Fungal ITS rDNA and 18S gene analyses (DGGE and direct sequencing approaches) showed the presence of representatives of three order (Polyporales, Malasseziales, and Agaricales) from the phylum Basidiomycota and seven orders belonging to the phylum Ascomycota (Arthoniales, Capnodiales, Dothideales, Eurotiales, Hypocreales, Pleosporales, and Saccharomycetales). On the other hand, bacterial 16S rDNA gene analyses by direct sequencing approach revealed the presence of representatives of seven bacterial phyla (Cyanobacteria, Proteobacteria, Actinobacteria, Bacteroidetes, Lentisphaerae, Chloroflexi, and Planctomycetes). Results from statistical analyses (rarefaction curves) suggested that the sampled clones covered the fungal diversity in the sponge samples studied, while for the bacterial community additional sampling would be necessary for saturation. This is the first report related to the molecular analyses of fungal and bacterial communities by cultivation-independent approaches in the marine sponges D. reticulatum. Additionally, the present work broadening the knowledge of microbial diversity associated to marine sponges and reports innovative data on the presence of some fungal genera in marine samples.
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Affiliation(s)
- Michel R Z Passarini
- Divisão de Recursos Microbianos, Centro Pluridisciplinar de Pesquisas Químicas, Biológicas e Agrícolas-CPQBA, Universidade Estadual de Campinas-UNICAMP, Rua Alexandre Cazelatto, Paulínia, SP, Brazil
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da Cruz GF, de Vasconcellos SP, Angolini CFF, Dellagnezze BM, Garcia INS, de Oliveira VM, dos Santos Neto EV, Marsaioli AJ. Could petroleum biodegradation be a joint achievement of aerobic and anaerobic microrganisms in deep sea reservoirs? AMB Express 2011; 1:47. [PMID: 22196374 PMCID: PMC3279308 DOI: 10.1186/2191-0855-1-47] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 12/23/2011] [Indexed: 11/10/2022] Open
Abstract
Several studies suggest that petroleum biodegradation can be achieved by either aerobic or anaerobic microorganisms, depending on oxygen input or other electron acceptors and appropriate nutrients. Evidence from in vitro experiments with samples of petroleum formation water and oils from Pampo Field indicate that petroleum biodegradation is more likely to be a joint achievement of both aerobic and anaerobic bacterial consortium, refining our previous observations of aerobic degradation. The aerobic consortium depleted, in decreasing order, hydrocarbons > hopanes > steranes > tricyclic terpanes while the anaerobic consortium depleted hydrocarbons > steranes > hopanes > tricyclic terpanes. The oxygen content of the mixed consortia was measured from time to time revealing alternating periods of microaerobicity (O2 ~0.8 mg.L-1) and of aerobicity (O2~6.0 mg.L-1). In this experiment, the petroleum biodegradation changed from time to time, alternating periods of biodegradation similar to the aerobic process and periods of biodegradation similar to the anaerobic process. The consortia showed preferences for metabolizing hydrocarbons > hopanes > steranes > tricyclic terpanes during a 90-day period, after which this trend changed and steranes were more biodegraded than hopanes. The analysis of aerobic oil degrading microbiota by the 16S rRNA gene clone library detected the presence of Bacillus, Brevibacterium, Mesorhizobium and Achromobacter, and the analysis of the anaerobic oil degrading microbiota using the same technique detected the presence of Bacillus and Acinetobacter (facultative strains). In the mixed consortia Stenotrophomonas, Brevibacterium, Bacillus, Rhizobium, Achromobacter and 5% uncultured bacteria were detected. This is certainly a new contribution to the study of reservoir biodegradation processes, combining two of the more important accepted hypotheses.
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Miqueletto PB, Andreote FD, Dias ACF, Ferreira JC, dos Santos Neto EV, de Oliveira VM. Cultivation-independent methods applied to the microbial prospection of oil and gas in soil from a sedimentary basin in Brazil. AMB Express 2011; 1:35. [PMID: 22018208 PMCID: PMC3282667 DOI: 10.1186/2191-0855-1-35] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Accepted: 10/22/2011] [Indexed: 11/10/2022] Open
Abstract
The upper parts of oil field structures may leak gas which is supposed to be indirectly detected by the soil bacterial populations. Such microorganisms are capable of consuming this gas, supporting the Microbial Prospection of Oil and Gas (MPOG) methodology. The goal of the present work was to characterize microbial communities involved in short-chain alkane metabolism, namely methane, ethane and propane, in samples from a petroliferous (P) soil through clone libraries of the 16S rRNA gene of the Domains Bacteria and Archaea and the catabolic gene coding for the soluble di-iron monooxygenase (SDIMO) enzyme alpha subunit. The microbial community presented high abundance of the bacterial phylum Actinobacteria, which represented 53% of total clones, and the Crenarchaeota group I.1b from the Archaea Domain. The analysis of the catabolic genes revealed the occurrence of seven Operational Protein Families (OPF) and higher richness (Chao = 7; Ace = 7.5) and diversity (Shannon = 1.09) in P soil when compared with a non-petroliferous (Np) soil (Chao = 2; Ace = 0, Shannon = 0.44). Clones related to the ethene monooxygenase (EtnC) and methane monooxygenase (MmoX) coding genes occurred only in P soil, which also presented higher levels of methane and lower levels of ethane and propane, revealed by short-chain hydrocarbon measures. Real-time PCR results suggested that the SDIMO genes occur in very low abundance in the soil samples under study. Further investigations on SDIMOs genes in natural environments are necessary to unravel their still uncharted diversity and to provide reliable tools for the prospection of degrading populations.
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Affiliation(s)
- Paula B Miqueletto
- Division of Microbial Resources, Research Center for Chemistry, Biology and Agriculture (CPQBA), UNICAMP, CP 6171, CEP 13081-970, Campinas, SP, Brazil
- Biomedical Sciences Institute (ICB-IV), University of São Paulo, São Paulo, Brazil
| | - Fernando D Andreote
- Departament of Soil Sciences, ESALQ, University of São Paulo, CP 09, CEP: 13418-900, Piracicaba, SP, Brazil
| | - Armando CF Dias
- Departament of Soil Sciences, ESALQ, University of São Paulo, CP 09, CEP: 13418-900, Piracicaba, SP, Brazil
| | - Justo C Ferreira
- PETROBRAS R&D Center, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21949-900, Brazil
| | - Eugênio V dos Santos Neto
- PETROBRAS R&D Center, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21949-900, Brazil
| | - Valéria M de Oliveira
- Division of Microbial Resources, Research Center for Chemistry, Biology and Agriculture (CPQBA), UNICAMP, CP 6171, CEP 13081-970, Campinas, SP, Brazil
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Sette LD, de Oliveira VM, Rodrigues MFA. Microbial lignocellulolytic enzymes: industrial applications and future perspectives. Microbiol Aust 2008. [DOI: 10.1071/ma08018] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The demand for microbial industrial enzymes is ever increasing due to their use in a wide variety of processes. Lignocellulolytic enzymes have potential applications in a large number of fields, including the chemical, fuel, food, agricultural, paper, textile and cosmetic industrial sectors. Lignocellulosic biomass is an abundant renewable resource composed of cellulose (a polymer of glucose that represents the major fraction of lignocellulose), hemicellulose (also a sugar polymer) and lignin (a complex phenylpropane polymer). Lignocellulosic material can be broken down by microorganisms into its sugar components, thereby providing a readily fermentable substrate. One of the most significant potential applications of lignocellulolytic enzymes is fuel production from agricultural and forest wastes as an alternative renewable energy resource. The need to reduce carbon dioxide emissions provides an additional incentive for the development of processes for production of fuels from lignocellulosic biomass and has attracted the interest of biotechnologists and microbiologists in recent decades.
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Sette LD, de Oliveira VM, Manfio GP. Isolation and characterization of alachlor-degrading actinomycetes from soil. Antonie Van Leeuwenhoek 2005; 87:81-9. [PMID: 15793617 DOI: 10.1007/s10482-004-1129-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2004] [Accepted: 07/05/2004] [Indexed: 11/24/2022]
Abstract
Alachlor (2-cloro-N-(methoxymethyl)-N-(2,6-diethylphenyl)-acetamide) is an extremely toxic and highly mobile herbicide that is widely used for pre-emergence control of grasses and weeds in many commercial crops in Brazil. In order to select soil actinomycetes able to degrade this herbicide, fifty-three actinomycete strains were isolated from soil treated with alachlor using selective conditions and subjected to in vitro degradation assays. Sixteen isolates were shown to be tolerant to high concentrations of the herbicide (up to 720 mg L(-1)), and six of these were able to grow and degrade >/= 50 alachlor (72 mg L(-1)) in mineral salts medium. Morphological and phylogenetic analysis enabled the assignment of the alachlor-degrading strains to the genus Streptomyces. Strain LS151 was related to the type strains of Streptomyces capoamus/Streptomyces galbus, whereas strains LS143 and LS153 were related to Streptomyces bikiniensis. The remaining strains, LS166, LS177 and LS182, were similar in morphological features and recovered in a single cluster based on 16S rDNA sequence analysis, but shown to be distinct on the basis of genomic fingerprint data (rep-PCR). Though a definitive taxonomic assignment of alachlor-degrading strains was not possible, these data indicate that ability to degrade this pesticide was detected in different Streptomyces taxa.
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MESH Headings
- Acetamides/metabolism
- Biodegradation, Environmental
- Brazil
- DNA Fingerprinting
- DNA, Bacterial/chemistry
- DNA, Bacterial/isolation & purification
- DNA, Ribosomal/chemistry
- DNA, Ribosomal/isolation & purification
- Genes, rRNA
- Molecular Sequence Data
- Phylogeny
- RNA, Bacterial/genetics
- RNA, Ribosomal, 16S/genetics
- Sequence Analysis, DNA
- Soil Microbiology
- Streptomyces/classification
- Streptomyces/cytology
- Streptomyces/isolation & purification
- Streptomyces/metabolism
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Affiliation(s)
- Lara D Sette
- Divisão de Recursos Microbianos (CPQBA), CP 6171, UNICAMP, CEP 13081-970, Campinas, SP, Brazil.
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