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    Is nitrogen transfer among plants enhanced by contrasting nutrient-acquisition strategies?

    Access Status
    Fulltext not available
    Authors
    Teste, F.
    Veneklaas, E.
    Dixon, Kingsley
    Lambers, H.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Teste, F. and Veneklaas, E. and Dixon, K. and Lambers, H. 2015. Is nitrogen transfer among plants enhanced by contrasting nutrient-acquisition strategies? Plant, Cell & Environment. 38: pp. 50-60.
    Source Title
    Plant, Cell & Environment
    DOI
    10.1111/pce.12367
    ISSN
    0140-7791
    URI
    http://hdl.handle.net/20.500.11937/46041
    Collection
    • Curtin Research Publications
    Abstract

    Nitrogen (N) transfer among plants has been found where at least one plant can fix N2. In nutrient-poor soils, where plants with contrasting nutrient-acquisition strategies (without N2 fixation) co-occur, it is unclear if N transfer exists and what promotes it. A novel multi-species microcosm pot experiment was conducted to quantify N transfer between arbuscular mycorrhizal (AM), ectomycorrhizal (EM), dual AM/EM, and non-mycorrhizal cluster-rooted plants in nutrient-poor soils with mycorrhizal mesh barriers. We foliarfed plants with a K15NO3 solution to quantify one-way N transfer from ‘donor’ to ‘receiver’ plants. We also quantified mycorrhizal colonization and root intermingling. Transfer of N between plants with contrasting nutrient-acquisition strategies occurred at both low and high soil nutrient levels with or without root intermingling. The magnitude of N transfer was relatively high (representing 4% of donor plant N) given the lack of N2 fixation. Receiver plants forming ectomycorrhizas or cluster roots were more enriched compared with AM-only plants. We demonstrate N transfer between plants of contrasting nutrient-acquisition strategies, and a preferential enrichment of cluster-rooted and EM plants compared with AM plants. Nutrient exchanges among plants are potentially important in promoting plant coexistence in nutrient-poor soils.

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