A widespread plant-fungal-bacterial symbiosis promotes plant biodiversity, plant nutrition and seedling recruitment

ISME Journal - Tập 10 Số 2 - Trang 389-399 - 2016
Marcel G. A. van der Heijden1,2,3, Susanne De Bruin4, L.L.P. Luckerhoff4, Richard S. P. van Logtestijn4, Klaus Schlaeppi3
1Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Zürich, Switzerland
2Plant-Microbe-Interactions, Institute of Environmental Biology, Faculty of Science, Utrecht University , The Netherlands
3Plant-Soil-Interactions, Institute for Sustainability Sciences, Agroscope, Zürich, Switzerland
4Department of Ecological Science, VU University Amsterdam, Amsterdam, The Netherlands

Tóm tắt

Abstract Highly diverse microbial assemblages colonize plant roots. It is still poorly understood whether different members of this root microbiome act synergistically by supplying different services (for example, different limiting nutrients) to plants and plant communities. In order to test this, we manipulated the presence of two widespread plant root symbionts, arbuscular mycorrhizal fungi and nitrogen-fixing rhizobia bacteria in model grassland communities established in axenic microcosms. Here, we demonstrate that both symbionts complement each other resulting in increased plant diversity, enhanced seedling recruitment and improved nutrient acquisition compared with a single symbiont situation. Legume seedlings obtained up to 15-fold higher productivity if they formed an association with both symbionts, opposed to productivity they reached with only one symbiont. Our results reveal the importance of functional diversity of symbionts and demonstrate that different members of the root microbiome can complement each other in acquiring different limiting nutrients and in driving important ecosystem functions.

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ISME Journal

Tập 10 Số 2

389-399

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