Community composition of bacteria co-cultivated with microalgae in non-axenic algal cultures
2009
Ueda, H.(Tokyo Univ. (Japan)) | Otsuka, S. | Senoo, K.
We examined the community compositions of bacteria in three non-axenic microalgal cultures, Chlorella saccharophila NIES-640, Ulothrix variabilis NIES-329 and Volvox aureus NIES-864, which had been maintained by subculturing without purification in the Microbial Culture Collection at the National Institute for Environmental Studies, Japan. Based on the similarity of the partial sequence of 16S rRNA gene, it was estimated that many species of bacteria in the cultures of U. variabilis NIES-329 and V. aureus NIES-864 are as-yet undescribed, in contrast to those in the C. saccharophila NIES-640 culture. The present and previous studies have indicated that some bacteria detected in the cultures might be associated with algae and/or can be hemi-selectively enriched with algae (e.g. Phyllobacterium bacteria and Chlorella algae). The present study indicates the potential usefulness of non-axenic cultures of algae as materials for studies on algal-bacterial associations.
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