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Mycelial production, spread and root colonisation by the ectomycorrhizal fungi Hebeloma crustuliniforme and Paxillus involutus under elevated atmospheric CO2

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Abstract

Effects of elevated atmospheric carbon dioxide (CO2) levels on the production and spread of ectomycorrhizal fungal mycelium from colonised Scots pine roots were investigated. Pinus sylvestris (L.) Karst. seedlings inoculated with either Hebeloma crustuliniforme (Bull:Fr.) Quél. or Paxillus involutus (Fr.) Fr. were grown at either ambient (350 ppm) or elevated (700 ppm) levels of CO2. Mycelial production was measured after 6 weeks in pots, and mycelial spread from inoculated seedlings was studied after 4 months growth in perlite in shallow boxes containing uncolonised bait seedlings. Plant and fungal biomass were analysed, as well as carbon and nitrogen content of seedling shoots. Mycelial biomass production by H. crustuliniforme was significantly greater under elevated CO2 (up to a 3-fold increase was observed). Significantly lower concentrations and total amounts of N were found in plants exposed to elevated CO2.

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Acknowledgements

We wish to thank Jan Parsby for technical support in constructing the CO2 chambers, and Björn Lindahl for discussing the results. We are grateful to Ian Alexander for comments on the manuscript. This work was done with financial support from the Swedish Energy Adminstration (STEM) and the Knut and Alice Wallenberg Foundation.

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Authors and Affiliations

  1. Department of Plant and Soil Science, School of Biological Sciences, Aberdeen University, Cruickshank Building, St Machar Drive, AB24 3UU, Aberdeen , Scotland

    Petra M. A. Fransson

  2. Department of Forest Mycology and Pathology, SLU, Box 7026, 75007, Uppsala, Sweden

    Petra M. A. Fransson, Andy F. S. Taylor & Roger D. Finlay

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  1. Petra M. A. Fransson
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  2. Andy F. S. Taylor
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  3. Roger D. Finlay
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Correspondence to Petra M. A. Fransson.

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Fransson, P.M.A., Taylor, A.F.S. & Finlay, R.D. Mycelial production, spread and root colonisation by the ectomycorrhizal fungi Hebeloma crustuliniforme and Paxillus involutus under elevated atmospheric CO2 . Mycorrhiza 15, 25–31 (2005). https://doi.org/10.1007/s00572-003-0289-7

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  • DOI: https://doi.org/10.1007/s00572-003-0289-7

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