Publication
Title
Fungal and bacterial utilization of organic substrates depends on substrate complexity and N availability
Author
Abstract
There is growing evidence of a direct relationship between microbial community composition and function, which implies that distinct microbial communities vary in their functional properties. The aim of this study was to determine whether differences in initial substrate utilization between distinct microbial communities are due to the activities of certain microbial groups. We performed a short-term experiment with beech forest soils characterized by three different microbial communities (winter and summer community, and a community from a tree-girdling plot). We incubated these soils with different C-13-labelled substrates with or without inorganic N addition and analyzed microbial substrate utilization by C-13-phospholipid fatty acid (PLFA) analysis. Our results revealed that the fate of labile C (glucose) was similar in the three microbial communities, despite differences in absolute substrate incorporation between the summer and winter community. The active microbial community involved in degradation of complex C substrates (cellulose, plant cell walls), however, differed between girdling and control plots and was strongly affected by inorganic N addition. Enhanced N availability strongly increased fungal degradation of cellulose and plant cell walls. Our results indicate that fungi, at least in the presence of a high N supply, are the main decomposers of polymeric C substrates.
Language
English
Source (journal)
FEMS microbiology: ecology / Federation of European Microbiological Societies. - Amsterdam
Publication
Amsterdam : 2014
ISSN
0168-6496 [print]
1574-6941 [online]
Volume/pages
87 :1 (2014) , p. 142-152
ISI
000329170100014
Full text (Publisher's DOI)
UAntwerpen
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 18.10.2018
Last edited 28.08.2021