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Brown rot of wood as a model for studies of lignocellulose humification

Hnědá hniloba dřeva jako model ke studiu humifikace lignocelulóz

  • Published:
Biologia Plantarum

Abstract

Humus substances synthesis was investigated in the course of birch wood decomposition by a brown-rot fungusPiptoporus betulinus. With progressing decomposition of wood by brown rot the proportion of high molecular weight humic acids is gradually increased at the expense of fulvic acids, the amount of which is proportionally lowered. The high molecular weight humus constituents are not accumulated in wood decomposed by a laccase producing white-rot fungi despite the availability of suitable phenolic substrates; the low molecular weight fraction of fulvic acids is permanently higher than the fraction of humic acids. The function of laccase in lignin degradation and in biosynthesis of humic acids is problematic.

Abstract

V průběhu rozkladu březového dřeva celulózovorní houbouPiptoporus betulinus byl sledován postup syntézy humusových látek. Se stupněm rozkladu trvale roste ve dřevu podíl vysokomolekulárních huminových kyselin na úkor fulvokyselin, jejichž obsah se v průběhu hnědé hniloby úměrně zmenšuje. V průběhu bílé hniloby vyvolané houbami produkujícími lakkázu se vysokomolekulární složky humusu ve dřevu nehromadí, i když mají houby k dispozici vhodné fenolické substráty; nízkomolekulární frakce fulvokyselin trvale převyšuje frakci kyselin huminových. Úloha lakkázy při stěpení ligninu a při syntéze humusových látek je problematická

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Authors and Affiliations

  1. Department of Plant Biology, Faculty of Sciences, J. E. Purkyně University, Brno

    V. Rypáček & Marie Rypáčková

  2. Institute for International Biological Program, Faculty of Forestry, College of Agriculture, Brno

    V. Rypáček & Marie Rypáčková

Authors
  1. V. Rypáček
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  2. Marie Rypáčková
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Dedicated to Academician S. Prát on the occasion of his 80th birthday

Addresses: Kotlářská 2, 611 37 Brno, 644 00 Brno-Soběšice, Czechoslovakia.

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Rypáček, V., Rypáčková, M. Brown rot of wood as a model for studies of lignocellulose humification. Biol Plant 17, 452–457 (1975). https://doi.org/10.1007/BF02921059

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