Synthesis and Applications of Isotopically Labelled Compounds, Volume 8

0109149 - UEB-Q 20043072 RIV GB eng M - Část monografie knihy
Matucha, Miroslav - Gryndler, Milan - Uhlířová, H. - Forczek, Sándor - Fuksová, K. - Schröder, P.
Investigations of the Role of Chloroacetic Acids in Forest Ecosystems Using Carbon 14 and Chlorine 36.
[Investigations of the Role of Chloroacetic Acids in Forest Ecosystems Using Carbon 14 and Chlorine 36.]
Synthesis and Applications of Isotopically Labelled Compounds, Volume 8. John Wiley & Sons, Ltd, 2004 - (Dean, D.; Filer, C.; McCarthy, K.), s. 165-170. ISBN 0-470-86365-X
Grant CEP: GA ČR GA522/02/0874
Výzkumný záměr: CEZ:AV0Z5038910
Klíčová slova: soil processes * microbial degradation * chlorination of humic acids
Kód oboru RIV: GK - Lesnictví

Using 14C- and 36Cl-labelled compounds and radio-indicator methods, we showed that chloroacetic acids (CAAs) in the forest soil are both microbially degraded and simultaneously formed by enzymatic chlorination of organic matter. Dichloroacetic acid (DCA) is degraded faster than trichloroacetic acid (TCA). Similarly, biodegradation of TCA in needles proceeds microbially as well. In vitro chlorination of acetic and humic acids is mediated by chloroperoxidase and leads to fast formation of DCA from acetic acid, while humic acids give rise also to TCA. Both processes result in a steady state of CAA concentration in soil and participate in decomposition of soil organic matter and in the chlorine cycle in forest ecosystems.

Investigations of the Role of Chloroacetic Acids in Forest Ecosystems Using Carbon 14 and Chlorine 36.
Trvalý link: http://hdl.handle.net/11104/0016259