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Title (Primary) Response of recalcitrant soil substances to reduced N deposition in a spruce forest soil: integrating laccase-encoding genes and lignin decomposition
Author Theuerl, S.; Dörr, N.; Guggenberger, G.; Langer, U.; Kaiser, K.; Lamersdorf, N.; Buscot, F.;
Journal FEMS Microbiology Ecology
Year 2010
Department BOOEK;
Volume 73
Issue 1
Language englisch;
Keywords soil ecology; degradation of organic matter; phenol oxidase activity; laccase-encoding gene diversity; reduction of N input
Abstract A long-term field experiment conducted in a Norway spruce forest at Solling, Central Germany, was used to verify and compare the response of lignin-decomposing fungal communities in soils receiving current and preindustrial atmospheric nitrogen (N) input for 14.5 years. Therefore, we investigated the decomposition of lignin compounds in relation to phenol oxidase activity and the diversity of basidiomycetes containing laccase genes in organic and mineral horizons. Lignin-derived CuO oxidation products and enzyme activity decreased with soil depth, while the degree of oxidative transformation of lignin increased. These patterns did not change with reduced atmospheric N input, likely reflecting a lasting saturation in available N. The laccase gene diversity decreased with soil depth in spring. In autumn, this pattern was only found in the control plot, receiving current N input. Principal component analysis confirmed the depth profile and distinguished a response of the fungal community to reduced N deposition for most organic layers in spring and a roof effect for the Oe layer in autumn. These responses of the fungal community did not translate into changes in enzyme activity and lignin content and decomposition, suggesting that transformation processes in soils are well buffered despite the rapid response of the microbial community to environmental factors.
ID 10578
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=10578
Theuerl, S., Dörr, N., Guggenberger, G., Langer, U., Kaiser, K., Lamersdorf, N., Buscot, F. (2010):
Response of recalcitrant soil substances to reduced N deposition in a spruce forest soil: integrating laccase-encoding genes and lignin decomposition
FEMS Microbiol. Ecol. 73 (1), 166 - 177