Mycorrhizal colonization status of plant species established in an exposed area following the 2000 eruption of Mt. Usu, Hokkaido, Japan |
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Authors: | Keisuke Obase Yutaka Tamai Takashi Yajima Toshizumi Miyamoto |
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Institution: | (1) Laboratory of Forest Resource Biology, Graduate School of Agriculture, Hokkaido University, Kita-9, Nishi-9, Kita-ku, Sapporo Hokkaido, 060-8589, Japan |
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Abstract: | We investigated the ectomycorrhizal (ECM) and arbuscular mycorrhizal (AM) colonization status of plant seedlings that established
in areas devastated by the eruption in March 2000 of Mt. Usu, Hokkaido, Japan. In 2005, we estimated the mycorrhizal colonization
ratios and frequencies in seedlings of twelve herbaceous and seven woody plant species. Although arbuscular mycorrhizas were
found to colonize Equisetum arvense and Polygonum sachalinense, they were presented at very low frequencies and colonization ratios. Other herbaceous plants exhibited higher frequencies
of AM associations and either AM and/or ECM fungal associations were observed in all of the woody plant seedlings investigated.
The dominant woody plant species (Populus maximowiczii, Salix sachalinensis and Salix hultenii var. angustifolia) associated mainly with ECM fungi and exhibited variable associations with AM fungi. Mycorrhizal associations were common
and significant events for plant establishment, even in the early stages of the revegetation process. |
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Keywords: | Mycorrhiza Ectomycorrhiza Arbuscular mycorrhiza Volcano Salicaceae |
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