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Influence of Pb contamination in boreal forest soil on the growth and ligninolytic activity of litter-decomposing fungi

Authors :
Tuomela, Marja
Steffen, Kari T.
Kerko, Elina
Hartikainen, Helinä
Hofrichter, Martin
Hatakka, Annele
Source :
FEMS Microbiology Ecology. Jun2005, Vol. 53 Issue 1, p179-186. 8p.
Publication Year :
2005

Abstract

Abstract: Lignin mineralization activity of three basidiomycetous litter-decomposing fungi (LDF) was studied with humus layer samples taken from a boreal forest soil. The total Pb concentration in the samples was 32,000 mg kg−1 and water soluble Pb 67 mg kg−1. Synthetic lignin mineralization by Collybia dryophila and Clitocybe (Lepista) nebularis was strongly inhibited, whereas Stropharia coronilla was more tolerant to Pb stress in soil and liquid cultures. Purified laccases maintained their activity and purified MnPs remained partly active up to a concentration of 1450 mg Pb l−1. High concentrations of Pb inhibited the growth of LDF and affected the activity of ligninolytic enzymes, but the extent of inhibition varied among different LDF species. In consequence, Pb contamination in soil may have a negative impact on recycling of organic carbon. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
01686496
Volume :
53
Issue :
1
Database :
Academic Search Index
Journal :
FEMS Microbiology Ecology
Publication Type :
Academic Journal
Accession number :
17949774
Full Text :
https://doi.org/10.1016/j.femsec.2004.11.008