Aphanizomenonaceae

Portrait of the cyanophyte, Aphanizomenon flosaquae. Collected from freshwater pond near Boise, Idaho. Brightfield optics.

Cylindrospermopsis (sill-in-dro-sperm-op-sis) raciborskii, a blue green alga (cyanobacterium) in which the terminal cells of the trichomes or filaments appear a bit like candle flames. With no membrane bound organelles but sometimes with refractile deposits. Differential interference microscopy. data on this strain.

Ribadelago de Franco, Castille and Leon, Spain

Covaleda, Castille and Leon, Spain

Castilla y Len, Espaa

Anabaenopsis spec. Scale bar indicates 10 µm. Collected from a pond near Lemkendorf, isle of Fehmarn (Baltic Sea). The image was built up using several photomicrographic frames with manual stacking technique. The images were taken using Zeiss Axioplan with Canon EOS 70D.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond in Lemkendorf, isle Fehmarn (Baltic Sea, Germany) Latitude: 54,472296 Longitude: 11,095662 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 10 µm. Probe aus dem Dorfteich Lemkendorf, Insel Fehmarn. Mikrotechnik: Zeiss Axioplan, Kamera: Canon EOS 70D. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Cylindrospermopsis (sill-in-dro-sperm-op-sis) raciborskii, a blue green alga (cyanobacterium) in which the terminal cells of the trichomes or filaments appear a bit like candle flames. With no membrane bound organelles but sometimes with refractile deposits. Phase contrast microscopy. data on this strain.

Argusino, Castilla y Len, Espaa

Anabaenopsis spec. Scale bar indicates 10 µm. Collected from a pond near Lemkendorf, isle of Fehmarn (Baltic Sea). The image was built up using several photomicrographic frames with manual stacking technique. The images were taken using Zeiss Axioplan with Canon EOS 70D.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond in Lemkendorf, isle Fehmarn (Baltic Sea, Germany) Latitude: 54,472296 Longitude: 11,095662 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 10 µm. Probe aus dem Dorfteich Lemkendorf, Insel Fehmarn. Mikrotechnik: Zeiss Axioplan, Kamera: Canon EOS 70D. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Cylindrospermopsis (sill-in-dro-sperm-op-sis) raciborskii, a blue green alga (cyanobacterium) in which the terminal cell of the trichome (filament) appears a bit like a candle flame. Phase contrast microscopy. " data on this strain.

Nodularia spumigena The scale bar indicates 50 µm (inset 5 µm). Collected from Bodden, the brackish waters lying between the isles of Hiddensee and Ruegen (German Baltic Sea). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Hiddensee Bodden (Germany) Latitude: 54,582633 Longitude: 13,115051 Der Messbalken markiert eine Länge von 50 µm (5 µm beim Einsatzbild). Probe aus dem Hiddenseer Bodden, der Brackwasserfläche zwischen den Inseln Hiddensee und Rügen. Mikrotechnik: Zeiss Universal, Kamera: Olympus C7070. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

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.

Aphanizomenon spec. The cyanobacteria genus Aphanizomenon is well known as an ingredient of health food providing lots of vitamins and trace elements But some strains are toxic. Collected from littoral region (reed belt by Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: River Wakenitz near Lübeck (Schleswig-Holstein, Germany) Latitude: 0 Longitude: 0 Die Cyanobakterien der Gattung Aphanizomenon ist auch als Bestandteil von Nahrungsergänzungsmitteln bekannt und enthalten viele Vitamine und Spurenelemente. Es gibt allerdings auch giftige Stämme, die Anatoxine produzieren. Aus mit Schilf bewachsener Uferzone eines Regenrückhaltebeckens in Kiel. Mikrotechnik: Zeiss Universal, Kamera: Olympus C7070. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

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.

Aphanizomenon flos-aquae Scale bar indicates 100 µm. Sample from the wetland Seekamper Seewiesen in Schilksee (Kiel). Sampling date 8/2021. Images were taken using Olympus stereomicroscope SZX16 with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Wetland Seekamper Seewiesen in Schilksee (Kiel, Germany) Latitude: 54,410447 Longitude: 10,159699 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 100 µm. Probe aus dem Feuchtbiotop Seekamper Seewiesen bei Schilksee/Kiel. Datum der Aufsammlung: 08/2021. Mikrotechnik: Olympus Stereomikroskop SZX16, Kamera: Olympus OM-D M5 MKII. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

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.

Aphanizomenon flos-aquae Scale bar indicates 2 mm. Sample from the wetland Seekamper Seewiesen in Schilksee (Kiel). Sampling date 8/2021. Images were taken using Olympus stereomicroscope SZX16 with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Wetland Seekamper Seewiesen in Schilksee (Kiel, Germany) Latitude: 54,410447 Longitude: 10,159699 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 2 mm. Probe aus dem Feuchtbiotop Seekamper Seewiesen bei Schilksee/Kiel. Datum der Aufsammlung: 08/2021. Mikrotechnik: Olympus Stereomikroskop SZX16, Kamera: Olympus OM-D M5 MKII. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

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.

Aphanizomenon flos-aquae The cyanobacteria genus Aphanizomenon is well known as an ingredient of health food providing lots of vitamins and trace elements But some strains are toxic. The specimen was gathered in the wetlands of national park Unteres Odertal (100 km north east of Berlin). The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Creek in Oder valley 100 km north east of Berlin (Germany) Latitude: 53,135032 Longitude: 14,348738 Die Cyanobakterien der Gattung Aphanizomenon ist auch als Bestandteil von Nahrungsergänzungsmitteln bekannt und enthalten viele Vitamine und Spurenelemente. Es gibt allerdings auch giftige Stämme, die Anatoxine produzieren. Die Probe wurde in den Feuchtgebieten des Nationalpark Unteres Odertal (100 km nordöstlich von Berlin) gesammelt. Mikrotechnik: Zeiss Universal, Kamera: Olympus C7070. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Under conditions of nitrogen deficiency A. ovalisporum develops heterocytes (central round and empty-looking cell in this filament), in which N2 fixation by nitrogenase enzymes takes place.

Aphanizomenon flos-aquae Sample from the wetland Seekamper Seewiesen in Schilksee (Kiel). Sampling date 8/2021. Images were taken using Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-ND). Place name: Wetland Seekamper Seewiesen in Schilksee (Kiel, Germany) Latitude: 54,410447 Longitude: 10,159699 Probe aus dem Feuchtbiotop Seekamper Seewiesen bei Schilksee/Kiel. Datum der Aufsammlung: 8/2021. Kamera: Olympus OM-D M5 MKII. Creative Commons License V 3.0 (CC BY-NC-ND). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Aphanizomenon ovalisporum (Cyanobacteria, Nostocales), showing atypical long cells in a filament grown in culture.

Aphanizomenon flos-aquae Scale bar indicates 1 mm. Sample from the wetland Seekamper Seewiesen in Schilksee (Kiel). Sampling date 8/2021. Images were taken using Olympus stereomicroscope SZX16 with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Wetland Seekamper Seewiesen in Schilksee (Kiel, Germany) Latitude: 54,410447 Longitude: 10,159699 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 1 mm. Probe aus dem Feuchtbiotop Seekamper Seewiesen bei Schilksee/Kiel. Datum der Aufsammlung: 08/2021. Mikrotechnik: Olympus Stereomikroskop SZX16, Kamera: Olympus OM-D M5 MKII. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

The specialized cells of Aphanizomenon ovalisporum: an akinete (large, thick-walled, egg-shaped cell in the upper filament) and a hetetocyte (egg-shaped, transparent cells in the middle and bottom filaments).   The akinetes are much larger than regular cells and can be mid-filament or terminal, at times a few in a single filament, sometimes several in a row. Akinetes function as asexual resting stage and are resistant to harsh conditions. Akinete formation is induced by P-limitation. The akinetes separate from the filament and sink to the sediments, where they remain until conditions are suitable for germination.