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Asnæs
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Anabaena (ann-a-bean-a) one of the filamentous blue green alga which can form heterocysts. Single filaments are attached to the substrate and occur within an irregular mucus sheath which acquires metal salts to become brown in colour. Heterocysts are spherical, more hyaline, slightly larger than other cells and are a site for enhanced nitrogen fixation. Differential interference contrast.
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Spirulina has a very distinctive corkscrew form.
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Asnæs
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Anabaena (ann-a-bean-a) one of the filamentous blue green alga which can form heterocysts. Single filaments are attached to the substrate and occur within an irregular mucus sheath which acquires metal salts to become brown in colour. The sheath is emphasized in this image. Heterocysts are spherical, more hyaline, slightly larger than other cells and are a site for enhanced nitrogen fixation. Phase contrast.
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Spirulina. Cell observed in sandy and muddy marine sediments in the vicinity of Broome, Western Australia in September 2003. This image was taken using phase contrast optics. This work was supported by the Australian Biological Resources Study.
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Asnæs
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Anabaena (ann-a-bean-a) a filamentous blue green algae, with differentiated cells within the filament or trichome. Differential interference microscopy.
data on this strain.
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Single spiral cell.
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Asnæs
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Anabaena (ann-a-bean-a) a filamentous blue green algae, with differentiated cells within the filament. The central cell is a heterocyst, the site of nitrogen fixation. Differential interference microscopy.
data on this strain.
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Aphanothece (a-fan-owe-theek-ee) blue green alga in which many coccoid or cylindrical cells share a common mucus sheath. Phase contrast.
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Asnæs
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Anabaena (ann-a-bean-a) filamentous blue-green alga (cyanobacterium), some cells are different to others. They are referred to as heterocysts, and seem to be specialised to carry out nitrogen fixation. Differential interference contrast.
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Aphanothece (a-fan-owe-theek-ee) blue green alga in which many coccoid or cylindrical cells share a common mucus sheath. Differential interference contrast.
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Asnæs
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Anabaena. Cell observed in freshwater sediments in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics. This work was supported by the Australian Biological Resources Study.
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Phormidium (four-mid-ee-um) a filamentous blue-green alga with the filaments enclosed within an organic sheath. Differential interference microscopy.
data on this strain.
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Allindelille Fredskov ved Ringsted
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A gliding filamernt of Anabaena, a couple of heterocysts are visible within the filament.
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Phormidium (four-mid-ee-um) the filaments consisting of a trichome (chain of cells) surrounded by an organic sheath. In this image, note the sheath in a region of the filament that lacks cells (upper left). Phase contrast microscopy.
data on this strain.
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Allindelille Fredskov ved Ringsted
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Filaments of Anabaena. The species may form heterocysts (thick walled cell, lower filament last complete cell on the right) and also resistant cells such as the long cylindrical cell. Phase contrast microscopy.
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This filamentous cyanobacterium is rare in the lake, but it grows readily on agar plates.