Ascomycetes with cellulolytic,amylolytic, pectinolytic,and mannanolytic activities inhabiting dead beech (<Emphasis Type="Italic">Fagus crenata</Emphasis>) trees |
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Authors: | K Fujii T Sugimura K Nakatake |
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Institution: | 1.Department of Agriculture,Yamaguchi University,Yoshida, Yamaguchi,Japan |
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Abstract: | It is generally accepted that dead tree decomposition is performed mainly by delignifying basidiomycetes. While ascomycetes
have been reported to inhabit dead tree bark, their contribution to dead tree decomposition is still unclear. Here, we isolated
five bark-inhabiting ascomycetes possessing cellulolytic activity from dead beech tree and assessed their polysaccharolytic
activities. When cultivated in a medium containing filter paper as a sole carbon source, three strains degraded >40 % of the
filter paper in a 4-week cultivation and the others degraded 15–30 % of the paper. The degraders possessed amylolytic, pectinolytic,
and mannanolytic activities as well as cellulolytic activity, implying that they play an important role in dead tree decomposition
after delignification by basidiomycetes. Phylogenetic analysis based on large subunit ribosomal DNA (lsu-DNA) sequences implied
that the isolates belonged to Penicillium or Amorphotheca. |
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