Bioprospecting for microorganisms of biotechnological importance in soils contaminated with agrochemicals

Ciência E Natura

Endereço:
Revista Ciência e Natura | Campus Sede-Cidade Universitária | Av. Roraima nº 1000, Prédio 13, Sala 1122 | Fone/Fax +55(55) 3220-8735 | Bairro Camobi
Santa Maria / RS
97105-900
Site: http://www.ufsm.br/cienciaenatura
Telefone: (55) 3220-8735
ISSN: 2179-460X
Editor Chefe: Marcelo Barcellos da Rosa
Início Publicação: 30/11/1979
Periodicidade: Quadrimestral

Bioprospecting for microorganisms of biotechnological importance in soils contaminated with agrochemicals

Ano: 2018 | Volume: 40 | Número: 1
Autores: Celso Henrique Jorge Costa , Antônio José Ramos Filho , Jennifer Slayder Santos Sousa,Érima Jôyssielly Mendonça Castro,and Rita de Cássia Mendonça de Miranda , Carlos Drielson da Silva Pereira
Autor Correspondente: Celso Henrique Jorge Costa | [email protected]

Palavras-chave: microhabitat; biotechnology; diversity

Resumos Cadastrados

Resumo Inglês:

The aim of the present study was to isolate microorganisms from soils contaminated with agrochemicals and to evaluate their potential for biodegradation and production of bioactive metabolites. For this, microorganisms were isolated from a soil sample by the serial dilution technique using four different media: potato dextrose agar (PDA), Mueller Hinton agar (MH), malt extract agar (MEA), and Bushnell Haas agar (BH). The isolated microorganisms were identified by their macro and micromorphological characteristics and were tested for their ability to use the DMA 806 BR agrochemical, by the dichlorophenol indophenol (DCPIP) method. Biosurfactant production and antimicrobial activity were evaluated in the selected microorganisms. The emulsifying activity was evaluated by the emulsification index (IE24) technique, while the antimicrobial activity was evaluated through the solid medium assay against pathogens of clinical interest. Among the media tested, MEA yielded the highest number of isolates, as well as a greater diversity of microbial groups, with a predominance of bacteria. Of the selected microorganisms, ten had the ability to use the agrochemical. Of these ten microorganisms, five presented emulsifying activity and two presented the capacity to produce secondary metabolites. Among them, the J5 and B48 strains were distinguished by their emulsifying and antimicrobial activity