| Autor: |
Stefan Raidl, R. Weigt, Michael Schloter, Anton Hartmann, K. Pritsch, Rita Verma, Reinhard Agerer |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Growth and Defence in Plants ISBN: 9783642306440 |
| DOI: |
10.1007/978-3-642-30645-7_10 |
| Popis: |
The ectomycorrhizosphere is a heterogeneous and variable micro-environment, predominantly established by variously formed extramatrical mycelia (EMM) that emanate from the hyphal mantle of ectomycorrhizae that envelopes the short roots. The mycelia differ fungal species-dependent regarding range, density and differentiation. Contingent upon the amount of sugars available for the ectomycorrhizal fungi — controlled, e.g. by elevated above-ground concentrations of ozone or carbon dioxide exposure to host trees — an ectomycorrhizal community can change its total amount of EMM, leading to changes in space occupation, and consequently, to alterations in its capacity to explore and exploit soil resources. We quantify the exploration type specific space occupation under the influence of twice-ambient ozone concentrations and estimate the carbon cost the tree has to pay for. Further, we address enzymatic capacities of ectomycorrhizal communities and focus on bacteria being associated with the mycelium. Finally we discuss the impact of soil micro-niches on ectomycorrhizal communities and mention briefly the ectomycorrhizal competition with each other and with saprotrophic fungi. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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