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Title: Effects of condensed tannins in conifer leaves on the composition and activity of the soil microbial community in a tropical montane forest
Authors: Ushio, Masayuki
Balser, Teri C.
Kitayama, Kanehiro  kyouindb  KAKEN_id
Author's alias: 潮, 雅之
Keywords: Condensed tannins
Plant-soil feedback
Soil enzyme activity
Soil microbial community
Tropical montane forest
Issue Date: Apr-2013
Publisher: Springer Netherlands
Journal title: Plant and Soil
Volume: 365
Issue: 1-2
Start page: 157
End page: 170
Abstract: [Background and aims]Condensed tannins, a dominant class of plant secondary metabolites, play potentially important roles in plant-soil feedbacks by influencing the soil microbial community. Effects of condensed tannins on the soil microbial community and activity were examined by a short-term tannin-addition experiment under field and laboratory conditions. [Methods]Condensed tannins were extracted from the leaves of a dominant conifer (Dacrydium gracilis) in a tropical montane forest on Mt. Kinabalu, Borneo. The extracted tannins were added to soils beneath the conifer and a dominant broadleaf (Lithocarpus clementianus) to evaluate the dependence of the response to tannin addition on the initial composition of the soil microbial community. [Results]Enzyme activities in the field tannin-addition treatment were lower than in the deionized-water treatment. Carbon and nitrogen mineralization were also inhibited by tannin-addition. The fungi-to-bacteria ratio after tannin-addition was higher compared with the distilled-water treatment in the laboratory experiment. [Conclusions]Based on our results, we suggest that the higher concentration of condensed tannins in the leaf tissues of Dacrydium than in those of Lithocarpus is a factor influencing the microbial community and activity. This may have influences on subsequent plant performance, which induces plant-soil feedback processes that can control dynamics of the tropical montane forest ecosystem.
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This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
DOI(Published Version): 10.1007/s11104-012-1365-6
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