Microbial Diversity Course 1997, MBL, Woods Hole
Cyanobacteria
Cyanobacteria form oxigen during photosynthesis. It is thought that it was these bacteria that were responsible for the first appearance of significant amounts of oxigen on earth about 2.3 billion years ago. Today, many different forms and shapes of cyanobacteria are known. In environmental samples cyanobacteria are easily recognized by light microsopy. If illuminated with green light, they will show a bright red autofluorescence. This is due to the presence of phycobili proteins and chlorophyll a.
The pure cultures shown here were kindly provided by
J. Waterbury.You are welcome to download the images. Just push "shift" and click with the mouse at the pictures you like. Annotations are included. If you want to read them first, click on
ann. If you intend to publish the images please observe the copyright:© 1997, Microbial Diversity.
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indexLast modified: 19-Feb-98
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Unicellular cyanobacteria |
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Gloeobacter spec. (PCC 8105) left: Phase contrast micrograph. right: autofluorescence after illumination with green light. |
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Reproducing by mutiple fission |
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Pleurocapsa spec. (PCC 7440) pure culture left: phase contrast micrograph right: autofluorescence after illumination with green light |
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Filamentous forms, without heterocysts |
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Lyngbia spec. (Sippewissett HIM) pure culture. Phase contrast micrograph |
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Lyngbya spec.(Sippewissett HIM) left: phase contrast micrograph right: autofluorescence after illumination with green light |
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Filamentous forms with heterocysts |
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right: phase contrast micrograph |
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Truely branching filamentous forms |
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Fischerella spec. (PCC 7414) pure culture left: phase contrast micrograph right: autofluorescence after illumination with green light |
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Sample from a brackish environment: School Street Marsch, Woods Hole, MA. left: phase contrast micrograph right: autofluorescence after illumination with green light. One cell of the filament is a heterocyst: It does not fluoresce,but is surrounded by heterotrophic bacteria. |
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Annotations |
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125K 508x480 |
Gloeobacter spec. (PCC 8105) Order Chroococcales, unicellular cyanobacterium. Pure culture provided by J. Waterbury Phase contrast micrograph. Copyright 1997, Microbial Diversity, Rolf Schauder and David Graham |
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Gloeobacter spec. (PCC 8105) Order Chroococcales, unicellular cyanobacterium. Pure culture provided by J. Waterbury Autoflourescence after illumination with green light. Copyright 1997, Microbial Diversity, Rolf Schauder and David Graham |
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Pleurocaps spec. (PCC 7440) Order Pleurocapsales, mulitply by multiple fission Pure culture provided by J. Waterbury Phase contrast micrograph. Copyright 1997, Microbial Diversity, Rolf Schauder and David Graham |
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Pleurocaps spec. (PCC 7440) Order Pleurocapsales, mulitply by multiple fission Pure culture provided by J. Waterbury Autoflourescence after illumination with green light. Copyright 1997, Microbial Diversity, Rolf Schauder and David Graham |
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Lyngbya spec (Sippewissett HIM) Order Oscillatoriales, filamtentous, non-heterocystous cyanobacterium. Pure culture provided by J. Waterbury. Phase contrast micrograph.. Copyright 1997 Microbial Diversity, Rolf Schauder and David Graham |
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Lyngbya spec (Sippewissett HIM) Order Oscillatoriales, filamtentous, non-heterocystous cyanobacterium. Pure culture provided by J. Waterbury. Phase contrast micrograph.. Copyright 1997 Microbial Diversity, Rolf Schauder and David Graham |
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Lyngbya spec (Sippewissett HIM) Order Oscillatoriales, filamtentous, non-heterocystous cyanobacterium. Pure culture provided by J. Waterbury. Autofluorescence after illumination with green light. Copyright 1997 Microbial Diversity, Rolf Schauder and David Graham |
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Cylindrospermum spec. (PCC 7417) Order Nostocales, heterocystous filamentous cyanobacteria pure culture provided by J. Waterbury Autofluorescence after illumination with green light. Copyright 1997 Microbial Diversity, Rolf Schauder and David Graham |
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Cylindrospermum spec. (PCC 7417) Order Nostocales, heterocystous filamentous cyanobacteria pure culture provided by J. Waterbury Phase contrast micrograph Copyright 1997 Microbial Diversity, Rolf Schauder and David Graham |
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118K 508x480 |
Fisherella spec. (PCC 7414) Order Stigonematales, true-branching filamentous cyanobacteria Pure culture, provided by J. Waterbury phase contrast micrograph. Copyright 1997 Microbial Diversity, Rolf Schauder and David Graham |
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Fisherella spec. (PCC 7414) Order Stigonematales, true-branching filamentous cyanobacteria Pure culture, provided by J. Waterbury Autofluorescence after illumination with green light. Copyright 1997 Microbial Diversity, Rolf Schauder and David Graham |
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86K 508x480 |
Cyanobacteria from the brackish School Street Marsh, Woods Hole, MA, USA. One cell of the filament is a heterocyst; it is surrounded by heterotrophic cells. Phase contrast micrograph of heterocf.jpg. Copyright 1997 Microbial Diversity, Tom Lie and Rolf Schauder |
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52K 508x480 |
Cyanobacteria from the brackish School Street Marsh, Woods Hole, MA, USA. One cell of the filament is a heterocyst; it does not fluoresce. Autofluorescence of heteroc.jpg after illumination with green light. Copyright 1997 Microbial Diversity, Tom Lie and Rolf Schauder |
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