Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Dietary Polysaccharides : Fermentation Potentials of a Primitive Gut Ecosystem

Title data

Zeibich, Lydia ; Schmidt, Oliver ; Drake, Harold L.:
Dietary Polysaccharides : Fermentation Potentials of a Primitive Gut Ecosystem.
In: Environmental Microbiology. (6 February 2019) .
ISSN 1462-2920
DOI: https://doi.org/10.1111/1462-2920.14556

Abstract in another language

The alimentary canal of the earthworm is representative of primitive gut ecosystems, and gut fermenters capable of degrading ingested biomass-derived polysaccharides might contribute to the environmental impact and survival of this terrestrial invertebrate. Thus, this study evaluated the postulation that gut microbiota of the model earthworm Lumbricus terrestris ferment diverse biomass-derived polysaccharides. Structural polysaccharides (e.g., cellulose, chitin) had marginal impact on fermentation in anoxic gut content treatments. In contrast, non-structural polysaccharides (e.g., starch, glycogen) greatly stimulated (a) the formation of diverse fermentation products (e.g., H2, ethanol, fatty acids) and (b) the facultatively-fermentative families Aeromonadaceae and Enterobacteriaceae. Despite these contrasting results with different polysaccharides, most saccharides derived from these biopolymers (e.g., glucose, N-acetylglucosamine) greatly stimulated fermentation, yielding 16S rRNA gene-based signatures of Aeromonadaceae-, Enterobacteriaceae-, and Fusobacteriaceae-affiliated phylotypes. Roots and litter are dietary substrates of the earthworm, and as proof-of-principle, gut-associated fermenters responded rapidly to root- and litter-derived nutrients including saccharides. These findings suggest that (a) hydrolysis of certain ingested structural polysaccharides may be a limiting factor in the ability of gut fermenters to utilize them and (b) non-structural polysaccharides of disrupted biomass are subject to rapid fermentation by gut microbes and yield fatty acids that can be utilized by the earthworm.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER149873
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Ecological Microbiology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Ecological Microbiology > Chair Ecological Microbiology - Univ.-Prof. Harold L. Drake, Ph.D.
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 28 Mar 2019 07:52
Last Modified: 28 Mar 2019 07:52
URI: https://eref.uni-bayreuth.de/id/eprint/48109