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International Journal of Medicinal Mushrooms
Facteur d'impact: 1.423 Facteur d'impact sur 5 ans: 1.525 SJR: 0.431 SNIP: 0.661 CiteScore™: 1.38

ISSN Imprimer: 1521-9437
ISSN En ligne: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/InterJMedicMush.v5.i2.80
6 pages

Lignocellulolytic Enzyme Activity During Growth and Fruiting of the Edible and Medicinal Mushroom Pleurotus ostreatus (Jacq.:Fr.) Kumm. (Agaricomycetideae)

Vladimir I. Elisashvili
Animal Husbandry and Feed Production Institute of Agricultural University of Georgia, 240 David Agmashenebeli alley, 0159 Tbilisi, Georgia
David Chichua
Institute of Biochemistry and Biotechnology, Academy of Science of Georgia, Agmashenebeli Alley 10 km, 380059 Tbilisi, Georgia
Eva Kachlishvili
The Agricultural University of Georgia, University Campus at Digomi, Tbilisi, Georgia
Nino Tsiklauri
Institute of Biochemistry and Biotechnology, Academy of Science of Georgia, 380059 Tbilisi, Georgia
Tamar Khardziani
Durmishidze Institute of Biochemistry and Biotechnology, Academy of Science of Georgia, 10 km Agmashenebeli kheivani, 0159 Tbilisi, Georgia

RÉSUMÉ

Cotton wastes can be converted without substrate pasteurization into value-added products, such as gourmet mushrooms, with biological efficacy up to 90% and lignocellulolytic enzymes. Edible and medicinal mushroom Pleurotus ostreatus carboxymethyl cellulase and laccase activities, extracted from both the surface and inside layers of blocks, increased during primordia and fruiting bodies development and declined rapidly after the harvest. In a study of xylanase production, it has been observed that the activity of the enzyme in inside layers of the substrate gradually increased during the 49 days (second fruiting stage) after inoculation and then gradually declined towards the end of mushroom cultivation. Fluctuations in xylanase activity in the surface layer were observed, so that maximal enzyme activities coincided with the fruiting stage of P. ostreatus development. In contrast to laccase, manganese peroxidase (MnP) activity was high during the colonization stage and declined during the first primordia and fruiting body formation stages. After this, while laccase activity decreased, MnP activity peaked at the mycelia stage in oyster mushroom development. Data on the levels of cellulase, xylanase, laccase, and MnP activity in spent mushroom substrate demonstrate that it can be used as an excellent source of these enzymes.