Metabolic extract of the endophytic fungus Flavodon flavus isolated from Justicia brandegeana in the control of Alicyclobacillus acidoterrestris in commercial orange juice.

Autor: Silva AA; Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Polonio JC; Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Polli AD; Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Oliveira JADS; Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Soares LC; Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Oliveira Junior VA; Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Vicentini VEP; Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Oliveira AJB; Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Gonçalves JE; Programa de Mestrado em Promoção da Saúde e Programa de Mestrado em Tecnologias Limpas, Centro Universitário de Maringá, Avenida Guedner, 1610, 87050-900 Maringá, Paraná, Brazil., Gonçalves RAC; Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Azevedo JL; Departmento de Genética - Escola Superior de Agricultura Luiz de Queiroz - ESALQ/USP, 13418-260 Piracicaba, São Paulo, Brazil., Pamphile JA; Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil., Abreu Filho BA; Departmento de Ciências Básicas da Saúde, Universidade Estadual de Maringá, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, Paraná, Brazil. Electronic address: baafilho@uem.br.
Jazyk: angličtina
Zdroj: International journal of food microbiology [Int J Food Microbiol] 2021 Jan 02; Vol. 338, pp. 109019. Date of Electronic Publication: 2020 Dec 08.
DOI: 10.1016/j.ijfoodmicro.2020.109019
Abstrakt: In this work, the antibacterial activity of a crude extract of the endophytic fungus Flavodon flavus (JB257), isolated from leaves of Justicia brandegeana, was evaluated against both the vegetative and sporulated forms of Alicyclobacillus acidoterrestris. The microdilution technique was performed in order to determine the antibacterial activity of the crude extract alone as well as in combination with the bacteriocin, nisin. The minimum inhibitory concentration (MIC) of the crude extract and nisin alone against A. acidoterrestris vegetative forms were 250 μg/mL and 31.5 μg/mL, respectively, while the minimum bactericidal concentrations (MBC) were 1000 μg/mL and 62.5 μg/mL,respectively. For A. acidoterrestris spores, treatment with the crude extract at a concentration of 500 μg/mL caused a 47% reduction in growth, while nisin at 62.5 μg/mL could reduce 100% of the growth. The in vitro evaluation of the crude extract combined with nisin against A. acidoterrestris by the Checkerboard method showed a synergistic interaction between the two compounds. In addition, greater selectivity towards bacterial cells over host cells, a human hepatocyte cell line, was achieved when the crude extract was combined with nisin, Using scanning electron microscopy, interferences in the cell membrane of A. acidoterrestris could be observed after treatment with the crude extract. The results presented in this study indicate that the crude extract of the endophyte F. flavus has biotechnological potential in the food industry, especially for the treatment of orange juices through the control of A. acidoterrestris.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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