A Hidden Pitfall in the Preparation of Agar Media Undermines Microorganism Cultivability

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  Colony formation by two strains, isolated from soil samples using PS medium, that do not form colonies on PT medium (Fig. S1); beta-diversity analysis of isolates obtained from river, sediment, and soil samples using PT, PS, and PW media (Fig. S2 and S3); means and SDs of proportions of genera that constitute >1% of isolates from river, sediment, or soil on PT, PS, or PW medium (Table S1).

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