ELEVATED ATMOSPHERIC CO2 CONCENTRATION CHANGES ECTOMYCORRHIZAL MORPHOTYPE ASSEMBLAGES IN BETULA-PAPYRIFERA

Citation
Dl. Godbold et Gm. Berntson, ELEVATED ATMOSPHERIC CO2 CONCENTRATION CHANGES ECTOMYCORRHIZAL MORPHOTYPE ASSEMBLAGES IN BETULA-PAPYRIFERA, Tree physiology, 17(5), 1997, pp. 347-350
Citations number
22
Categorie Soggetti
Ecology,Forestry,"Plant Sciences
Journal title
ISSN journal
0829318X
Volume
17
Issue
5
Year of publication
1997
Pages
347 - 350
Database
ISI
SICI code
0829-318X(1997)17:5<347:EACCCE>2.0.ZU;2-0
Abstract
Ectomycorrhizae are extremely diverse, with different species of fungi having very different physiologies and morphologies that, in turn, co nfer a range of different benefits to the host plant. To test the hypo thesis that elevated CO2 leads to changes in the assemblage of ectomyc orrhizae associated with trees, we examined the number and frequency o f ectomycorrhizal morphotypes colonizing roots of Betula papyrifera Ma rsh. saplings grown at an ambient or elevated (700 ppm) atmospheric CO 2 concentration for 24 weeks. Elevated CO2 resulted in significant cha nges in the composition of the ectomycorrhizal assemblage toward morph otypes with a higher incidence of emanating hyphae and rhizomorphs. We conclude that B. papyrifera saplings will be able to support a more c ostly mycorrhization in future elevated-CO2 atmospheres.