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Filaments of this blue-green (cyanobacterial) alga are formed of disc-shaped cells joined end to end. The filaments can glide slowly.
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Short length of this filamentous blue green alga within its stiff mucus sheath. From a surface film formed by large numbers of iron bacteria. Differential interference contrast optics.
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Rewetted cryptobiotic soil crust. Lyngbya species (red arrow and inset) and Microcoleus species predominate.Collected from high desert sagebrush habitat in the Escalante national Monument, Utah,37°48'17" N ,111°32'45" W. September 2007.Reflected light macrophotograph (inset microphotograp,DIC).
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Plectonema (plecked-owe-knee-ma) is a filamentous cyanobacterium. Individual cells are more or less cylindrical, but typically have rounded ends and may be a little swollen centrally. The cells move slowly within a sheath - which can be seen here external to some dead cells of the filament. These particular cells were not particularly strongly coloured. Phase contrast.
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Tolypothrix (toe-leap-owe-thricks), a filamentous and branching blue green alga (cyanobacterium) with a heterocyst located at the base of each branch point. Filaments within a well developed sheath. Differential interference contrast.
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Tolypothrix (toe-leap-owe-thricks), a filamentous and branching blue green alga (cyanobacterium) with a heterocyst located at the base of each branch point. Filaments within a well developed sheath. Phase contrast.
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Tolypothrix (toll-eep-o-thricks) is a filamentous blue-green alga (cyanobacterium) which expresses false branching, i.e., the cells divide in one plane only, but a heterocyst may cause cells to break free and form an apparent branch. Heterocysts are differentiated thick-walled cells that provide the site for nitrogen fixation. This image shows a tangle of filaments. Differential interference microscopy.
data on this strain.
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Tolypothrix (toll-eep-o-thricks) is a filamentous blue-green alga (cyanobacterium) which expresses false branching, i.e., the cells divide in one plane only, but a heterocyst may cause cells to break free and form an apparent branch. Two false branches are shown in this image. Heterocysts are differentiated thick-walled cells that provide the site for nitrogen fixation, and three are prominent in this image. Differential interference microscopy.
data on this strain.
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Tolypothrix (toll-eep-o-thricks) is a filamentous blue-green alga (cyanobacterium) which expresses false branching, i.e., the cells divide in one plane only, but a heterocyst may cause cells to break free and form an apparent branch. Heterocysts are differentiated thick-walled cells that provide the site for nitrogen fixation. In this image, the empty-looking heterocyst is located within the trichome and has a rectanglular shape. Differential interference microscopy.
data on this strain.
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Tolypothrix (toll-eep-o-thricks) is a filamentous blue-green alga (cyanobacterium) which expresses false branching, i.e., the cells divide in one plane only, but a heterocyst may cause cells to break free and form an apparent branch. Heterocysts are differentiated thick-walled cells that provide the site for nitrogen fixation. In this image, the heterocyst is terminal and has a hemispherical shape. Differential interference microscopy.
data on this strain.
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The cyanobacteria genus Aphanizomenon is well known as an ingredient of health food providing lots of vitamins and trace elements. Collected from littoral region (stand of Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.
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Aphanizomenon is a cyanobacterium that often occurs in large aggregates. This was isolated on 4th April in a 20 micron plankton net haul at Sällvik (sample 4). Phase contrast micrograph.
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Aphanizomenon is a cyanobacterium that often occurs in large aggregates. This was isolated on 4th April in a 20 micron plankton net haul at Sällvik (sample 4). Phase contrast micrograph.
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Aphanizomenon is a cyanobacterium that often occurs in large aggregates. This was isolated on 4th April in a 20 micron plankton net haul at Sällvik (sample 4). These DIC images show the vacuolate character of the cell contents.
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Cylindrospermum has many cells joined end to end to form long filaments. Not all the cells are identical and probably have different functions.
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The cells at the end of the filaments are heterocysts. Some long rod shaped bacteria have colonized most heterocysts suggesting that there is some kind of mutualistic relationship. Phase contrast microscopy.
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Colony of cyanobacteria in mucilaginous sheath. Scale bar indicates 50 µm. Sample from sphagnum pond situated in the northern alpine region of Austria near Salzburg. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Colonial blue green alga, filaments are bound together in a sheath to form a ball that may measure up to a millimetre in diameter. Differential interference contrast optics.
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Arthrospira (are-throw-spy-ra) maxima, a blue green alga in which the cells are joined end to end to form twisted, spiral or wavey filaments. Dark ground illumination.
data on this strain.
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Arthrospira (are-throw-spy-ra) maxima, a blue green alga in which the cells are joined end to end to form twisted filaments. Blue green colour comes from distinctive combination of photosynthetic pigments. Differential interference microscopy.
data on this strain.
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Chroococcidiopsis (crow-owe-cock-sid-ee-op-sis) polanisana, a blue green alga (cyanobacterium) with aggregated cells forming a sheet-like array. Blue green or olive green in colour. Differential interference microscopy.
data on this strain.
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Chroococcidiopsis (crow-owe-cock-id-ee-op-sis) polanisana, a blue green alga (cyanobacterium) with aggregated cells forming a sheet-like array. Blue green or olive green in colour. Differential interference microscopy.
data on this strain.
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Microcystis aeruginosa (Kützing, 1833) F.T. Kützing, 1846.Collected from a freshwater aquaculture tub near Boise, Idaho December 2005. DIC
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Scale bar indicates 50 µm. Sample from the pond Hegne Moor situated in the vicinity of Lake Constance. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA).