Isolating "Uncultivable" Microorganisms in Pure Culture in a Simulated Natural Environment

American Association for the Advancement of Science (AAAS) - Tập 296 Số 5570 - Trang 1127-1129 - 2002
T. Kaeberlein1, Kim Lewis1, Slava S. Epstein1
1Biology Department, Northeastern University, Boston, MA 02115, USA, and Marine Science Center, Northeastern University, Nahant, MA 01908, USA.

Tóm tắt

The majority (>99%) of microorganisms from the environment resist cultivation in the laboratory. Ribosomal RNA analysis suggests that uncultivated organisms are found in nearly every prokaryotic group, and several divisions have no known cultivable representatives. We designed a diffusion chamber that allowed the growth of previously uncultivated microorganisms in a simulated natural environment. Colonies of representative marine organisms were isolated in pure culture. These isolates did not grow on artificial media alone but formed colonies in the presence of other microorganisms. This observation may help explain the nature of microbial uncultivability.

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We thank W. Fowle and D. Woebken (Northeastern University Electron Microscopy Center) for help with scanning electron microscopy. We also thank E. Jarroll and M. Kaeberlein for comments on earlier versions of the paper. This work was funded by the U.S. National Science Foundation (grant OCE-0102248).