Summary
The distribution of spore positive (Sp+) and spore negative (Sp−) nodules on the two native alder species (A. incana andA. glutinosa) in Finland was investigated. Nodules were collected throughout the country from different ecosystems (forests, swamps, lake- sea- and riversides, old pastures and fields as well as from alder plantations).
OnA. incana Sp+ nodules predominated, whereas onA. glutinosa the vast majority of the nodules were of the Sp− type. Sp+ nodules onA. glutinosa were found only at sites where the two alder species grew close together. This distribution pattern indicates an association of nodule type with alder species, the reasons for which are discussed. Indications of saprophytic growth in the Sp− strain were also found.
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Weber, A. Distribution of spore-positive and spore-negative nodules in stands ofAlnus glutinosa andAlnus incana in Finland. Plant Soil 96, 205–213 (1986). https://doi.org/10.1007/BF02374765
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DOI: https://doi.org/10.1007/BF02374765