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Electrophoretic isozyme patterns from mycelia, primordia, cap and stem of Pleurotus spp. collected in Korea were compared. Primordia, cap and stem of fruitbody showed very similar isozyme patterns but mycelial isozyme patterns were different from those of fruitbody. Isozyme patterns of malate dehydrogenase, acid phosphatase in Pleurotus ostreatus collected from different regions in Korea were similar but those of esterase, peroxidase, leucine amino peptidase and superoxide dismutase were different. Interspecific comparison of esterase isozyme patterns among Pleurotus oslreatus, P. cornucopiae and P. florida was very different and may be valuable subsidiary tool to conventional taxonomic techniques for identifying species of Pleurotus. A dendrogram by similarities of isozyme band pattern was presented.
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