Journal
SOIL BIOLOGY & BIOCHEMISTRY
Volume 46, Issue -, Pages 49-52Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2011.11.011
Keywords
2,7-diaminofluorene; Peroxidases; Phenoloxidases; Climate warming; Peatland; Open top chambers
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Funding
- French National Agency for Research [ANR-07-VUL-010]
- Franche-Comte Region
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Peatlands still suffer from the scarcity of available data about the characterization and the response to climate forcing of the main oxidative enzymes that occur over the seasons. In the present study, phenoloxidase and peroxidase activities were examined in Sphagnum lawns along a narrow fen-bog gradient under experimental elevated temperatures. We showed that peroxidase activities from Sphagnum mosses were 1000-fold higher than those of phenoloxidases irrespective of seasons and sampling areas. Peroxidase activities increased (+30%) with the rise of air temperatures (an average of 1 degrees C), while warming did not alter phenoloxidase activities. These results suggest that the monitoring of peroxidase activities in peatlands may represent a suitable and forward indicator of the impact of climate warming on carbon cycle in peatlands. (C) 2011 Elsevier Ltd. All rights reserved.
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