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Frankia populations were analyzed in three soils devoid of actinorhizal plants but containing monocultures of birch (Betula pendula Roth), pine (Pinus sylvestris L.) or spruce (Picea abies (L.) Karsten). Bioassays using seedlings of Alnus incana as capture plants resulted in nodulation capacities of 3160+/-7, 2267+/-13, and 2747+/-6 nodulation units g -1 of these soils, respectively....
The effect of the passage through the gut of the earthworm Lumbricus terrestris L. on fungi and bacteria ingested with decomposing leaves of Taraxacum officinale and with soil was quantified using image analysis tools. Both leaf and soil material were labeled with fluorescent latex microbeads to allow a quantification of the food sources in the fore-, mid-, and hindgut of the earthworms. The content...
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