FIGURE 4 | Micrographs of important oligotrophic marine bacteria.

From the following article:

The importance of culturing bacterioplankton in the 'omics' age

Stephen Giovannoni & Ulrich Stingl

Nature Reviews Microbiology 5, 820-826 (October 2007)

doi:10.1038/nrmicro1752

The importance of culturing bacterioplankton in the 'omics' age

a | A transmission electron micrograph of Prochlorococcus marinus. The image is courtesy of F. Partensky, National Centre for Scientific Research, France. b | A transmission electron micrograph of negatively stained Candidatus Pelagibacter ubique (SAR11) cells in culture. The spherical object is a latex bead that has a diameter of 0.514 microns. Image b reproduced, with permission, from Nature Ref. 20 © (2002) Macmillan Publishers Ltd.

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