Fungal and bacterial utilization of organic substrates depends on substrate complexity and N availability

10721 11 70419 2 195062 document 70419 KorandaEtAl_FEMS Microbial Ecology_fungal bacterial utilisationA4+fr.pdf application/pdf b17fca6d7a7a03b11dafe3a8b3f6c077 MD5 265559 2016-08-29 09:04:51 https://pure.iiasa.ac.at/id/eprint/10721/1/KorandaEtAl_FEMS%20Microbial%20Ecology_fungal%20bacterial%20utilisationA4%2Bfr.pdf 10721 1 1 application/pdf text en public

KorandaEtAl_FEMS Microbial Ecology_fungal bacterial utilisationA4+fr.pdf

15 70420 2 195064 document 70420 lightbox.jpg image/png 2531c916747fc3932b455d0f49f1f9b1 MD5 16625 2016-08-29 09:05:20 https://pure.iiasa.ac.at/id/eprint/10721/2/lightbox.jpg 10721 2 2 image/png other Thumbnails conversion from text to thumbnail_lightbox en public

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KorandaEtAl_FEMS Microbial Ecology_fungal bacterial utilisationA4+fr.pdf

http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/70419 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/70419 http://eprints.org/relation/isCoversheetVersionOf https://pure.iiasa.ac.at/id/document/70419 archive 351 disk0/00/01/07/21 2016-01-15 08:49:53 2021-08-27 17:23:50 2016-01-15 08:49:53 monograph show 3 Koranda M. Kaiser C. 1967 Fuchslueger L. Kitzler B. Sessitsch A. Zechmeister-Boltenstern S. Richter A. Fungal and bacterial utilization of organic substrates depends on substrate complexity and N availability pub iis_ecl prog_eep prog_pds 13C-phospholipid fatty acid analysis; Microbial community; Substrate utilization; Respiration 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 13C-labelled substrates with or without inorganic N addition and analyzed microbial substrate utilization by 13C-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. 2013 published IR-13-042 IR-13-042 143 public interim_report IIASA, Laxenburg, Austria 31 FALSE info:eu-repo/semantics/book