Role of the antioxidant defense system during the production of lignocellulolytic enzymes by fungi

被引:0
|
作者
Georgia B. Pompeu
Vivian C. Pietrobon
Cristiane C. F. Andreote
Luiz F. R. Ferreira
Mario Aguiar
Sergio B. Sartori
Sandra H. Cruz
Regina T. R. Monteiro
机构
[1] Universidade de São Paulo,Laboratório de Ecologia Aplicada, Centro de Energia Nuclear na Agricultura
[2] Universidade Tiradentes,Instituto de Tecnologia e Pesquisa
[3] Colorado State University,Department of Cell and Molecular Biology
[4] Universidade de São Paulo,Departamento de Agroindústria, Alimentos e Nutrição, Escola Superior de Agricultura Luiz de Queiroz
来源
International Microbiology | 2019年 / 22卷
关键词
Agro-industrial residues; Biodegradation; Oxidative stress; Sugarcane bagasse;
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学科分类号
摘要
Fungi are used for the production of several compounds and the efficiency of biotechnological processes is directly related to the metabolic activity of these microorganisms. The reactions catalyzed by lignocellulolytic enzymes are oxidative and generate reactive oxygen species (ROS). Excess of ROS can cause serious damages to cells, including cell death. Thus, the objective of this work was to evaluate the lignocellulolytic enzymes produced by Pleurotus sajor-caju CCB020, Phanerochaete chrysosporium ATCC 28326, Trichoderma reesei RUT-C30, and Aspergillus niger IZ-9 grown in sugarcane bagasse and two yeast extract (YE) concentrations and characterize the antioxidant defense system of fungal cells by the activities of superoxide dismutase (SOD) and catalase (CAT). Pleurotus sajor-caju exhibited the highest activities of laccase and peroxidase in sugarcane bagasse with 2.6 g of YE and an increased activity of manganese peroxidase in sugarcane bagasse with 1.3 g of YE was observed. However, P. chrysosporium showed the highest activities of exoglucanase and endoglucanase in sugarcane bagasse with 1.3 g of YE. Lipid peroxidation and variations in SOD and CAT activities were observed during the production of lignocellulolytic enzymes and depending on the YE concentrations. The antioxidant defense system was induced in response to the oxidative stress caused by imbalances between the production and the detoxification of ROS.
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页码:255 / 264
页数:9
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