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International Journal of Medicinal Mushrooms
IF: 1.423 5-Year IF: 1.525 SJR: 0.431 SNIP: 0.716 CiteScore™: 2.6

ISSN Print: 1521-9437
ISSN Online: 1940-4344

International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.2020035958
pages 919-929

Ligno(hemi)cellulolytic Enzyme Profiles during the Developmental Cycle of the Royal Oyster Medicinal Mushroom Pleurotus eryngii (Agaricomycetes) Grown on Supplemented Agri-Wastes

Tao Tao Ni
Institute of Edible Fungi, 1018 Jinqi Road, Shanghai Academy of Agricultural Sciences, Shanghai 201403, P.R. China
Xiaoyan Zhao
Institute of Agri-Food Standards and Testing Technology, 1018 Jinqi Road, Shanghai Academy of Agricultural Sciences, Shanghai 201403, P.R. China
Zengtao Xing
Institute of Agri-Food Standards and Testing Technology, 1018 Jinqi Road, Shanghai Academy of Agricultural Sciences, Shanghai 201403, P.R. China
Qi Tan
National Engineering Research Center of Edible Fungi, Ministry of Science and Technology (MOST), Key Laboratory of Edible Fungal Resources and Utilization (South), Key Laboratory of Agricultural Genetics and Breeding of Shanghai, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
John A. Buswell
Institute of Edible Fungi, 1018 Jinqi Road, Shanghai Academy of Agricultural Sciences, Shanghai 201403, P.R. China


We have determined the production profiles of major ligno(hemi)cellulolytic enzymes at different stages of the mushroom development cycle during industrial scale cultivation of Pleurotus eryngii on supplemented agri-wastes. Endo-1,4-β-glucanase, cellobiohydrolase and endoxylanase levels remained relatively low during substrate colonization, increased sharply when small fruit bodies appeared, and peaked at maturation. β-Glucosidase and β-xylosidase levels decreased when substrate colonization was complete, increased with the appearance of small fruit bodies and primordia, respectively, and reached maxima at maturation. Laccase peaked along with substrate colonization but, after falling sharply in the upper substrate layers, remained relatively low until postinduction. Levels increased slightly when primordia appeared, fell to minimal values during the small and mature fruit body stages, and increased again postharvest. Manganese peroxidase (Mn-P) exhibited a similar pattern initially but high enzyme levels also coincided with primordia formation. Laccase and Mn-P activity patterns were compatible with a lignin-degradation function associated with substrate colonization and, in the former case, a putative role in fruit body morphogenesis. Based on the relatively low levels of polysaccharidases recorded during the initial stages of substrate colonization, we conclude that reducing sugar levels in noncolonized substrate were adequate for sustainable vegetative growth at that stage. We further conclude that the increase in enzyme production later in the developmental cycle was consistent with the replenishment of depleted reducing sugar from cellulose in the growth substrate to levels required for fruit body formation. These data provide new information describing combined temporal and spatial enzyme production profiles throughout the mushroom development cycle under a set of conditions used in industrial scale production.


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