Effect of Chalara longipes on decomposition of humic acids from Picea abies needle litter
Language English Country United States Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
15702548
DOI
10.1007/bf02931536
Knihovny.cz E-resources
- MeSH
- Ascomycota growth & development metabolism MeSH
- Biodegradation, Environmental MeSH
- Biomass MeSH
- Ecosystem MeSH
- Humic Substances analysis MeSH
- Molecular Weight MeSH
- Soil Microbiology MeSH
- Picea chemistry MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Humic Substances MeSH
The effect of the saprotrophic ascomycete Chalara longipes on the decomposition of humic acids was determined in a cultivation experiment. The fungus was incubated in liquid cultures in a full-strength (F system) and an organic nitrogen-free medium (F-N system), both amended with pure humic acids isolated from spruce forest litter. Fungal biomass production was highest in the F system with humic acids and lowest in the F-N system, the effect of organic nitrogen and humic acids being significant (p < 0.05). The presence of organic nitrogen seems to be essential for growth. The fungus utilized humic acids; molar mass distribution in media obtained by gel-permeation chromatography showed decrease in the humic acids fraction. Decolorization of the media reached 75 and 64 % in the F and F-N systems, respectively. The molar mass of humic acids probably also decreased as estimated from the increase in the absorbance A465/A665 (A4/A6) ratio. It is assumed that the utilization of humic acids may be mediated by the production of organic acids (as their components) and production of some oxidative enzymes.
See more in PubMed
Environ Sci Technol. 2002 Oct 15;36(20):4334-45 PubMed
Arch Biochem Biophys. 1999 Apr 15;364(2):228-34 PubMed
Folia Microbiol (Praha). 2003;48(1):76-82 PubMed
Appl Environ Microbiol. 2002 Jul;68(7):3442-8 PubMed
FEMS Microbiol Rev. 1998 Apr;22(1):21-44 PubMed
The use of hydroxyl-radical-generating systems for the treatment of olive mill wastewaters