LeratGauciCatfordEtAl2002

Référence

Lerat, S., Gauci, R., Catford, J.G., Vierheilig, H., Piche, Y. and Lapointe, L. (2002) C-14 transfer between the spring ephemeral Erythronium americanum and sugar maple saplings via arbuscular mycorrhizal fungi in natural stands. Oecologia, 132(2):181-187.

Résumé

We investigated in the field the carbon (C) transfer between sugar maple (Acer saccharum) saplings and the spring ephemeral Erythronium americanum via the mycelium of arbuscular mycorrhizal (AM) fungi. Sugar maple saplings and E. americanum plants were planted together in pots placed in the ground of a maple forest in 1999. Ectomycorrhizal yellow birches (Betula alleghaniensis) were added as control plants. In spring 2000, during leaf expansion of sugar maple saplings, the leaves of E. americanum were labelled with (CO2)-C-14. Seven days after labelling, radioactivity was detected in leaves, stem and roots of sugar maples. Specific radioactivity in sugar maples was 13-fold higher than in yellow birches revealing the occurrence of a direct transfer of C-14 between the AM plants. The quantity of C-14 transferred to sugar maple saplings was negatively correlated with the percentage of C-14 allocated to the storage organ of E. americanum. A second labelling was performed in autumn 2000 on sugar maple leaves during annual growth of E. americanum roots. Radioactivity was detected in 7 of 22 E. americanum root systems and absent in yellow birches. These results suggest that AM fungi connecting different understorey species can act as reciprocal C transfer bridges between plant species in relation with the phenology of the plants involved.

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@ARTICLE { LeratGauciCatfordEtAl2002,
    AUTHOR = { Lerat, S. and Gauci, R. and Catford, J.G. and Vierheilig, H. and Piche, Y. and Lapointe, L. },
    TITLE = { C-14 transfer between the spring ephemeral Erythronium americanum and sugar maple saplings via arbuscular mycorrhizal fungi in natural stands },
    JOURNAL = { Oecologia },
    YEAR = { 2002 },
    VOLUME = { 132 },
    PAGES = { 181-187 },
    NUMBER = { 2 },
    NOTE = { Times Cited: 14 Article English Cited References Count: 26 580pl },
    ABSTRACT = { We investigated in the field the carbon (C) transfer between sugar maple (Acer saccharum) saplings and the spring ephemeral Erythronium americanum via the mycelium of arbuscular mycorrhizal (AM) fungi. Sugar maple saplings and E. americanum plants were planted together in pots placed in the ground of a maple forest in 1999. Ectomycorrhizal yellow birches (Betula alleghaniensis) were added as control plants. In spring 2000, during leaf expansion of sugar maple saplings, the leaves of E. americanum were labelled with (CO2)-C-14. Seven days after labelling, radioactivity was detected in leaves, stem and roots of sugar maples. Specific radioactivity in sugar maples was 13-fold higher than in yellow birches revealing the occurrence of a direct transfer of C-14 between the AM plants. The quantity of C-14 transferred to sugar maple saplings was negatively correlated with the percentage of C-14 allocated to the storage organ of E. americanum. A second labelling was performed in autumn 2000 on sugar maple leaves during annual growth of E. americanum roots. Radioactivity was detected in 7 of 22 E. americanum root systems and absent in yellow birches. These results suggest that AM fungi connecting different understorey species can act as reciprocal C transfer bridges between plant species in relation with the phenology of the plants involved. },
    KEYWORDS = { carbon transfer arbuscular mycorrhiza sugar maple acer saccharum erythronium americanum herbaceous woodland plants water transport acer-saccharum carbon roots mycelium translocation assimilate morphology infection },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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