Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.mimet.2008.02.019
Title (Primary) Polymerized coumaric acid as a model substrate for terrestrial-derived dissolved organic carbon utilized by aquatic microorganisms
Author Tittel, J.; Poerschmann, J.; Wannicke, N.; Kamjunke, N.
Source Titel Journal of Microbiological Methods
Year 2008
Department TUCHEM; SEEFO
Volume 73
Issue 3
Page From 237
Page To 241
Language englisch
Keywords Algae; Bacteria; DOC; GC-MS; IC-MS; Lignin
Abstract It is now widely accepted that many surface waters receive more terrestrial carbon than assumed in the past, and that aquatic food webs are largely based on the supply of external dissolved organic carbon. However, very little information is available on how efficiently external carbon is utilized by microorganisms and transported to consumers of higher trophic levels. To address this issue, we prepared and tested polymers of 14C-p-coumaric acid (PCA) as a model substrate for terrestrial organic carbon. Photodegradation products that can be considered potential substrates for microorganisms were identified using hyphenated techniques, including gas chromatography-mass spectrometry (GC/MS) and ion chromatography-electrospray ionization mass spectrometry (IC/MS). Photolysis of PCA released monomeric phenol derivatives, e.g. 4-hydroxybenzaldehyde. The photolysis products observed were similar to those characteristic for natural organic carbon. Both a heterotrophic bacteria assemblage and a cultured algae strain exhibiting heterotrophic capabilities proved capable of utilizing the model substrate. Irradiation of PCA increased the uptake rate approximately eight times for the bacteria, but no significant increase was observed for the algae. Potential sources of interferences, e.g. the uptake of 14CO2 released by photolysis, were addressed. It was concluded that PCA is a suitable substrate to study the metabolism of terrestrial DOC within aquatic communities.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=1520
Tittel, J., Poerschmann, J., Wannicke, N., Kamjunke, N. (2008):
Polymerized coumaric acid as a model substrate for terrestrial-derived dissolved organic carbon utilized by aquatic microorganisms
J. Microbiol. Methods 73 (3), 237 - 241 10.1016/j.mimet.2008.02.019