Abstract
Aspergillus japonicus is an efficient degrader of phenolics and carbohydrates present in a mixture of soluble lignocarbohydrate complexes extracted from wheat straw. Trichoderma sp. attacked part of the carbohydrate but hardly affected the aromatic portion of this solution. Polyporus versicolor had a complex effect; polymerization of low-molecular-size phenolics accompanied the degradation of aromatic and carbohydrate polymers. The addition of xylose to the medium facilitated depolymerization of lignin by the fungi tested and prevented the polymerization of low-molecular-size fractions of lignocarbohydrate complexes by P. versicolor. P. versicolor, in contrast to A. japonicus and Trichoderma sp., also excreted into the medium considerable amounts of laccase, but only in the absence of endogenous or exogenous carbohydrates. Apparently, laccase is involved in polymerization rather than degradation of lignin in this organism. A number of extracellular glycanases were also secreted by these fungi.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bamforth C. W. The adaptability, purification and properties of exo-beta 1,3-glucanase from the fungus Trichoderma reesei. Biochem J. 1980 Dec 1;191(3):863–866. doi: 10.1042/bj1910863. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Chahal D. S., Moo-Young M., Dhillon G. S. Bioconversion of wheat straw and wheat straw components into single-cell protein. Can J Microbiol. 1979 Jul;25(7):793–797. doi: 10.1139/m79-116. [DOI] [PubMed] [Google Scholar]
- Han Y. W. Microbial utilization of straw (a review). Adv Appl Microbiol. 1978;23:119–153. doi: 10.1016/s0065-2164(08)70066-2. [DOI] [PubMed] [Google Scholar]
- Kubaĉková M., Karácsonyi S., Toman R. Purification of xylanase from the wood-rotting fungus Trametes hirsuta. Folia Microbiol (Praha) 1976;21(1):28–35. doi: 10.1007/BF02879003. [DOI] [PubMed] [Google Scholar]
- SMOGYI M. Notes on sugar determination. J Biol Chem. 1952 Mar;195(1):19–23. [PubMed] [Google Scholar]