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Effect of six species of white-rot basidiomycetes on the chemical composition and rumen degradability of wheat straw.
MedLine Citation:
PMID:  12501327     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
This study was conducted to investigate changes in in vitro dry matter digestibility (IVDMD), volatile fatty acids (VFA) production and cell-wall constituent degradation in wheat straw treated with six white-rot fungi: Daedalea quercina, Hericium clathroides, Phelinus laevigatus, Inonotus andersonii, Inonotus obliquus, and Inonotus dryophilus. The incubation of wheat straw for 30 days at 28 C improved IVDMD from 41.4 (control) to 59.2% for D. quercina, 56.3% for H. clathroides, 50.2% for P. laevigatus, 51.4% for I. andersonii, 52% for I. obliquus, and 55.9% for I. dryophilus. In contrast, the growth of fungi was accompanied by the dry matter loss of wheat straw: 43% for D. quercina, 12% for H. clathroides, and 22-25% for the other fungi. It is evident that the increase in digestibility by D. quercina was not offset by a loss of dry matter. The total VFA production during the rumen fermentation of fungus-treated straw was slightly increased by H. clathroides and I. dryophilus only. Neutral detergent fiber (NDF) and acid detergent fiber (ADF) were reduced in fungus-treated straw. Out of the three fractions (hemicellulose, cellulose, and lignin), hemicellulose and lignin showed the largest proportionate loss after inoculation with the fungi D. quercina, H. clathroides, P. laevigatus, and I. obliquus. The other two fungi showed the largest proportionate loss in cellulose and hemicellulose contents. The results of this study suggest that the digestion enhancement of wheat straw colonized by white-rot fungi is regulated by complex factors including the degradation of structural carbohydrates and lignin.
Authors:
Dusan Jalc; Peter Siroka; Zuzana (breve) Ceresnáková Zb
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Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  The Journal of general and applied microbiology     Volume:  43     ISSN:  0022-1260     ISO Abbreviation:  J. Gen. Appl. Microbiol.     Publication Date:  1997 Jun 
Date Detail:
Created Date:  2002-Dec-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0165543     Medline TA:  J Gen Appl Microbiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  133-137     Citation Subset:  -    
Affiliation:
Institute of Animal Physiology, Slovak Academy of Sciences, Soltésovej, 040 01 Kosice, Slovak Republic.
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