Anabaena

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Anabaena
Heterocyst
Akinete
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Anabaena
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Anabaena
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Anabaena
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Gloeocapsa
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Gloeocapsa
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Gleocapsa
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Oscillatoria
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Oscillatoria
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Oscillatoria
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Nostoc
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Morphological Diversity of Prokaryotes

• Cells have a diversity of shapes the most common
  being
• spheres (cocci)
• rods (bacilli)
• helices (spirilla and spirochetes).
• Prokaryotes are generally single-celled
• Also diplo-, strepto-, staphylo-, filamentous
• Some have specialized functions, heterocysts in
  Anabaena.

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• Fig 27.3

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Gram Stain