Lignin degradation, ligninolytic enzymes activities and exopolysaccharide production by Grifola frondosa strains cultivated on oak sawdust

Brazilian Journal of Microbiology

Nona A Mikiashvili¹  Omoanghe S Isikhuemhen¹  Elijah I Ohimain¹ 

[1] ,North Carolina A& T State University School of Agriculture and Environmental Sciences Mushroom Biology & Fungal Biotechnology LaboratoryGreensboro NC ,USA

关键词: Grifola frondosa;    exopolysaccharide;    laccase;    lignin degradation;    peroxidase;   

DOI  :  10.1590/S1517-83822011000300031

来源: SciELO

【 摘 要 】

Fourteen strains of Grifola frondosa (Dicks.) S. F. Gray, originating from different regions (Asia, Europe and North America) were tested for lignin degradation, ligninolytic enzyme activities, protein accumulation and exopolysaccharide production during 55 days of cultivation on oak sawdust. Lignin degradation varied from 2.6 to7.1 % of dry weight of the oak sawdust substrate among tested strains. The loss of dry matter in all screened fungi varied between 11.7 and 33.0%, and the amount of crude protein in the dry substrate varied between 0.94 to 2.55%. The strain, MBFBL 596, had the highest laccase activity (703.3 U/l), and the maximum peroxidase activity of 22.6 U/l was shown by the strain MBFBL 684. Several tested strains (MBFBL 21, 638 and 662) appeared to be good producers of exopolysaccharides (3.5, 3.5 and 3.2 mg/ml respectively).

【 授权许可】

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