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Of the 103 species (41 families) sampled from two limestone sites in Korea, 98 species (95.1%) contained VA mycorrhizae. No mycorrhizal structures were observed in the other 5 species. The nonmycorrhizal species were members of the following 4 families: Equisetaceae, Davalliaceae, Amaranthaceae and Ericaceae. Of the 124 species (51 families) sampled from two different nonlimestone sites, 99 species (79.8%) were found to contain VA mycorrhizae and no mycorrhizal structures were observed in the other 25 species. The nonmycorrhizal species were members of the following 16 families: Equiaetaceae, Pteridacaea, Daualliaceae, Cyperaceae, Commelinaceae, Polygonaceae, Chenopodiaceae, Phytolaceaceae, Amaranthaceae, Aizoaceae, Portulacaceae, Caryophyllaceae, Fumariaceae, Cruciferae, Fricaceae and Rubiaceae.
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