Journal
SOIL BIOLOGY & BIOCHEMISTRY
Volume 53, Issue -, Pages 78-81Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2012.05.007
Keywords
Arbuscular mycorrhizas; Bacterial community structure; Denaturing gradient gel electrophoresis; Diazotrophs; Denitrification; Nitrogen fixation; Plantago lanceolata
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Impacts of divergent arbuscular mycorrhizal (AM) fungi, Glomus intra radices and Gigaspora margarita, on denitrifying and diazotrophic bacterial communities of Plantago lanceolata in nutrient-limited dune soil were assessed. We hypothesized AM species-related modifications that were confirmed in respective bacterial nirK and nifH sequence polymorphism -based community clustering and community variance allocation. The denitrifying community appeared more responsive to AM fungi than the nitrogen-fixing community. Nevertheless, the main explanatory variable, in both cases, was plant age. We conclude that AM fungi can modify N-cycling microbial rhizosphere communities and future work should aim to verify the functional significance and mechanistic basis. (C) 2012 Elsevier Ltd. All rights reserved.
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