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Ectomycorrhizal fungi in culture respond differently to increased carbon availability.
- Source :
- FEMS Microbiology Ecology; Aug2007, Vol. 61 Issue 2, p246-257, 12p, 2 Charts, 5 Graphs
- Publication Year :
- 2007
-
Abstract
- Carbon (C) availability to ectomycorrhizal fungi is likely to increase at elevated atmospheric CO<subscript>2</subscript>. To determine whether there are any broad patterns in species' responses that relate to their ecology, we compared growth, respiration, N uptake and C exudation of 17 fungal isolates in liquid culture. As a surrogate for increased C availability we used three different C:N ratios (10:1, 20:1 and 40:1), moving from conditions of C limitation to conditions of N limitation. Responses were species-specific, and suilloid fungi were the most responsive in terms of growth and respiration. In contrast, a group of eight isolates showed no growth increase above C:N 20:1. This inability to respond was not due to N limitation, although there were marked differences in N uptake between isolates. At higher C availability isolates generally became more efficient in converting C into biomass. Six isolates showed net release of exudates into the culture medium (up to 40% of the C in biomass and respiration). We conclude that the findings were in agreement with field observations, and suggest that pure culture observations can yield ecologically relevant information on how ectomycorrhizal fungi may respond under conditions of elevated CO<subscript>2</subscript>. [ABSTRACT FROM AUTHOR]
- Subjects :
- CARBON
ECTOMYCORRHIZAL fungi
MYCORRHIZAL fungi
PARASITIC plants
PLANT ecology
Subjects
Details
- Language :
- English
- ISSN :
- 01686496
- Volume :
- 61
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- FEMS Microbiology Ecology
- Publication Type :
- Academic Journal
- Accession number :
- 25787967
- Full Text :
- https://doi.org/10.1111/j.1574-6941.2007.00343.x