Figure F74. Photomicrograph showing single bacterial cells within bacterial colony CFU16, cultured from altered vitric tuff, after (A) simultaneously staining with the DNA-binding fluorochrome DAPI and (B) hybridization with the CY3-labeled probe SRB385Db, specific for sulfate-reducing bacteria. Note that not all cells given in A did respond to the specific hybridization shown, indicating at least two different bacterial specimens exist within the bacterial colony.

Figure F74. Photomicrograph showing single bacterial cells within bacterial colony CFU16, cultured from altered vitric tuff, after (A) simultaneously staining with the DNA-binding fluorochrome DAPI and (B) hybridization with the CY3-labeled probe SRB385Db, specific for sulfate-reducing bacteria. Note that not all cells given in A did respond to the specific hybridization shown, indicating at least two different bacterial specimens exist within the bacterial colony.