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de Moura Dickel JD, Carvalho JK, Silveira MAD, Menegotto Dos Santos P, Rodrigues MLF, Fagundes-Klen MR, Rosa CA, Johann S, Buzanello CV, da Silva de Lucca RA, de Oliveira Santos AR, da Rosa MF. Aspergillus sclerotiorum lipolytic activity and its application in bioremediation of high-fat dairy wastewater environments. Environ Sci Pollut Res Int 2023; 30:35517-35527. [PMID: 36529799 DOI: 10.1007/s11356-022-24669-z] [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: 09/14/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Oils and grease (O&G) have low affinity for water and represent a class of pollutants present in the dairy industry. Enzyme-mediated bioremediation using biocatalysts, such as lipases, has shown promising potential in biotechnology, as they are versatile catalysts with high enantioselectivity and regioselectivity and easy availability, being considered a clean technology (white biotechnology). Specially in the treatment of effluents from dairy industries, these enzymes are of particular importance as they specifically hydrolyze O&G. In this context, the objective of this work is to prospect filamentous fungi with the ability to synthesize lipases for application in a high-fat dairy wastewater environment. We identified and characterized the fungal species Aspergillus sclerotiorum as a good lipase producer. Specifically, we observed highest lipolytic activity (20.72 U g-1) after 96 h of fermentation using sunflower seed as substrate. The fungal solid fermented was used in the bioremediation in dairy effluent to reduce O&G. The experiment was done in kinetic from 24 to 168 h and reduced over 90% of the O&G present in the sample after 168 h. Collectively, our work demonstrated the efficiency and applicability of fungal fermented solids in bioremediation and how this process can contribute to a more sustainable wastewater pretreatment, reducing the generation of effluents produced by dairy industries.
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Affiliation(s)
| | - Jéssyca Ketterine Carvalho
- Engineering and Exact Sciences Center, State University Western Paraná, Toledo, PR, Brazil.
- Department of Engineering and Exact, Federal University of Paraná, Palotina, PR, Brazil.
| | - Maruhen Amir Datsch Silveira
- Centre de Recherche du CHU de Québec - Université Laval, Axe Oncologie, Quebec, QC, G1V 4G2, Canada
- Centre de Recherche Sur Le Cancer de L'Université Laval, Quebec, QC, G1R 3S3, Canada
| | | | | | | | - Carlos Augusto Rosa
- Microbiology Department, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Susana Johann
- Microbiology Department, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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Lee DK, Santos ARDO, Hsiang T, Rosa CA, Lachance MA. Catching speciation in the act-act 2: Metschnikowia lacustris sp. nov., a sister species to Metschnikowia dekortorum. Antonie Van Leeuwenhoek 2020; 113:753-762. [PMID: 32100143 DOI: 10.1007/s10482-020-01395-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 12/14/2019] [Accepted: 02/12/2020] [Indexed: 10/24/2022]
Abstract
The isolation of a single yeast strain in the clade containing Metschnikowia dekortorum, in the Amazon biome of Brazil, incited us to re-examine the species boundaries within the clade. The strain (UFMG-CM-Y6306) was difficult to position relative to neighbouring species using standard barcode sequences (ITS-D1/D2 rRNA gene region). Mating took place freely with α strains of M. bowlesiae, M. dekortorum, and M. similis, but two-spored asci, indicative of a fertile meiotic progeny, were formed abundantly only with certain strains of M. dekortorum. Accordingly, we examined mating success among every phylotype in the clade and constructed a phylogeny based on a concatenation of 100 of the largest orthologous genes annotated in draft genomes. The analyses confirmed membership of the Amazonian isolate in M. dekortorum, but also indicated that the species should be subdivided into two. As a result, we retain three original members of M. dekortorum in the species, together with the new isolate, and reassign six isolates recovered from Mesoamerican lacustrine habitats to Metschnikowia lacustris sp. nov. The type is UWOPS 12-619.2T (isotype CBS 16250T). MycoBank: MB 833751.
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Affiliation(s)
- Dong Kyung Lee
- Department of Biology, University of Western Ontario, London, ON, N6A 5B7, Canada
| | | | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Carlos A Rosa
- Departamento de Microbiologia, ICB, Universidade Federal de Minas Gerais, C.P. 486, Belo Horizonte, MG, Brazil
| | - Marc-André Lachance
- Department of Biology, University of Western Ontario, London, ON, N6A 5B7, Canada.
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Santos ARDO, Lee DK, Ferreira AG, do Carmo MC, Rondelli VM, Barros KO, Hsiang T, Rosa CA, Lachance MA. The yeast community of Conotelus sp. (Coleoptera: Nitidulidae) in Brazilian passionfruit flowers (Passiflora edulis) and description of Metschnikowia amazonensis sp. nov., a large-spored clade yeast. Yeast 2020; 37:253-260. [PMID: 32017239 DOI: 10.1002/yea.3453] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/12/2019] [Accepted: 11/15/2019] [Indexed: 11/11/2022] Open
Abstract
Species of the nitidulid beetle Conotelus found in flowers of Convolvulaceae and other plants across the New World and in Hawaii consistently harbour a yeast community dominated by one or more large-spored Metschnikowia species. We investigated the yeasts found in beetles and flowers of cultivated passionfruit in Rondônia state, in the Amazon biome of Brazil, where a Conotelus species damages the flowers and hinders fruit production. A sample of 46 beetles and 49 flowers yielded 86 and 83 yeast isolates, respectively. Whereas the flower community was dominated by Kodamaea ohmeri and Kurtzmaniella quercitrusa, the major yeasts recovered from beetles were Wickerhamiella occidentalis, which is commonly isolated from this community, and a novel species of large-spored Metschnikowia in the arizonensis subclade, which we describe here as Metschnikowia amazonensis sp. nov. Phylogenetic analyses based on barcode sequences (ITS-D1/D2) and a multigene alignment of 11,917 positions (genes ura2, msh6, and pmt2) agreed to place the new species as a sister to Metschnikowia arizonensis, a rare species known only from one locality in Arizona. The two form sterile asci when mated, which is typical of related members of the clade. The α pheromone of the new species is unique but typical of the subclade. The type of M. amazonensis sp. nov. is UFMG-CM-Y6309T (ex-type CBS 16156T , mating type a), and the designated allotype (mating type α) is UFMG-CM-Y6307A (CBS 16155A ). MycoBank MB 833560.
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Affiliation(s)
| | - Dong Kyung Lee
- Department of Biology, University of Western Ontario, London, Ontario, Canada
| | | | - Marina Conceição do Carmo
- Departamento de Agronomia e Entomologia, Universidade Federal Rural de Pernambuco, Recife, Pernambuco, Brazil
| | - Vando Miossi Rondelli
- Departamento de Agronomia, Universidade Federal de Rondônia, Rolim de Moura, Rondônia, Brazil
| | - Katharina O Barros
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Carlos A Rosa
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marc-André Lachance
- Department of Biology, University of Western Ontario, London, Ontario, Canada
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