Journal Article

Elevated atmospheric CO<sub>2</sub> concentration changes ectomycorrhizal morphotype assemblages in <i>Betula papyrifera</i>

D. L. Godbold and G. M. Berntson

in Tree Physiology

Volume 17, issue 5, pages 347-350
Published in print May 1997 | ISSN: 0829-318X
Published online May 1997 | e-ISSN: 1758-4469 | DOI: http://dx.doi.org/10.1093/treephys/17.5.347
Elevated atmospheric CO2 concentration changes ectomycorrhizal morphotype assemblages in Betula papyrifera

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Ectomycorrhizae are extremely diverse, with different species of fungi having very different physiologies and morphologies that, in turn, confer a range of different benefits to the host plant. To test the hypothesis that elevated CO2 leads to changes in the assemblage of ectomycorrhizae associated with trees, we examined the number and frequency of ectomycorrhizal morphotypes colonizing roots of Betula papyrifera Marsh. saplings grown at an ambient or elevated (700 ppm) atmospheric CO2 concentration for 24 weeks. Elevated CO2 resulted in significant changes in the composition of the ectomycorrhizal assemblage toward morphotypes with a higher incidence of emanating hyphae and rhizomorphs. We conclude that B. papyrifera saplings will be able to support a more costly mycorrhization in future elevated-CO2 atmospheres.

Keywords: carbon dioxide; ectomycorrhizae; hyphae; mycorrhizal morphotype; rhizomorph

Journal Article.  0 words. 

Subjects: Plant Sciences and Forestry

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