Exploration types of ectomycorrhizae
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There is a need to quantify and qualify the ability of ectomycorrhizae to improve tree growth and nutrition and, in particular, to define criteria to classify ectomycorrhizae with respect to ecologically relevant features. Whereas the numbers of ectomycorrhizae and morphotypes give useful information when related to root biomass, root length or soil volume, the development and differentiation of the extramatrical mycelium may represent important predicative features relevant to the ecological classification of ectomycorrhizae. Here, different exploration types of ectomycorrhizae are distinguished based on the amount of emanating hyphae or the presence and differentiation of rhizomorphs. Their putative ecological importance is discussed.
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