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The dynamics of root system in the fairy rings of Tricholoma matsutake was investigated in four zones divided into 'zone of decayed mycorrhizae', 'zone of mycorrhizae for fruiting', 'zone of physiologically active mycorrhizae' and 'zone of roots free from mycorrhizal infection'. The roots of Pinus d...

The dynamics of root system in the fairy rings of Tricholoma matsutake was investigated in four zones divided into 'zone of decayed mycorrhizae', 'zone of mycorrhizae for fruiting', 'zone of physiologically active mycorrhizae' and 'zone of roots free from mycorrhizal infection'. The roots of Pinus densiflora in fairy rings, which occupied 70% of upper crown, comprised about 60% and 87% of total roots and alive roots, respectively. The ratio of fine-roots of P. densiflora over total roots was relatively higher than other species since that of P. densiflora was about 45% while that of the other species was about 13% on research of fine-roots. Especially, the roots of pine comprised about 70% of total root in the zone of mycorrhizae for fruiting and the zone of physiologically active mycorrhizae, which indicated that the pine roots were closely related to the fairy rings of T. matsutake. The fine roots of P. densiflora in the zone of physiologically active mycorrhizae was about 60.7%(1,087mg/100g soil) which was about twice compared to that of other zones. It allowed us to suppose that the fine roots of P. densiflora can make active growth in the zone of physiologically active mycorrhizae, and the growth was promoted by the fairy ring formation of T. matsutake. In addition, we found 3~5 times higher amount of fine roots than that of medium roots of P. densiflora in this zone, which indicated that the fairy rings of T. matsutake locate in the region of active growth of P. densiflora' roots.

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