Gammaproteobacteria

Chromatium (chrome-ace-ee-um) is a red sulphur bacterium (or purple sulphur bacterium). It is found in sediments above the reduced zone. It uses solar energy to assist in the oxidation of hydrogen sulphide producing elemental sulphur which is deposited within the bacterial cell as sulphur granules. Photosynthetic pigments are pink which give the cell its distinctive colour. It is one of a variety of bacteria which metabolise sulphur compounds and deposit sulphur granules within the cells - both red (such as Thiocystis), and colourless (such as Beggiatoa, Achromatium, Thiovulvum, and others). Not all Chromatium are as large as this cell. Phase contrast.

Achromatium oxaliferum (Schewiakoff 1893), a large colorless sulpher bacterium from bottom sediments of a stagnant freshwater pond near Boise, Idaho. Brightfield.

Thioploca is a filamentous sulfur-oxidizing bacterium, with the unusual characteristic of building sheaths around bundles of its filaments. They can travel up and down the sheaths by gliding motility. Thioploca can be found in sediments and also in microbial mats. These specimens are from Okinawa, Japan. Thanks to the OIST Marine Science Support Section for hosting our visit in Nov 2017! [taxonomy:genus=Thioploca]

Aeromonas hydrophilaAeromonas hydrophila. Gram stain.1977From Wikimedia Commons

Canada Del Hoyo, Castille la Mancha, Spain

Common nameBacterial leaf streakScientific nameXanthomonas oryzae pv. oryzicola (Fang et al.) Swings et al.Part of the image collection of the International Rice Research Institute (IRRI).

Villoslada de Cameros, La Rioja, Spain

Bacterial sheath brown rot.Part of the image collection of the International Rice Research Institute (IRRI).

Jason Sharp;Myakka, Manatee County, Florida

Achromatium oxaliferum Multi-layer image shows cell in conjugation sharing genetic information. Scale bar indicates 50 µm. Sample from ponds situated in the vicinity of Lake Constance. The image was built up using several photomicrographic frames with manual stacking technique. The 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: Pond situated in the vicinity of Lake Constance (Germany) Latitude: 47,734945 Longitude: 9,091097 Die Multiebenenabbildung zeigt zwei Zellen in Konjugation (Austausch von Erbinformationen). Tiefenschärfe durch Multiebenenabbildung aus mehreren Bildebenen, manuell gestapelt. Der Messbalken markiert eine Länge von 50 µm. Probe aus einem Teich in der Nähe des Bodensees. 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.

Longitude (deg): -1.1. Latitude (deg): 51.4. Longitude (deg/min): 1° 10' W. Latitude (deg/min): 51° 30' N. Vice county name: Berks. Vice county no.: 22. Country: England. Associated species: Aesculus hippocastanum. Identified by: Malcolm Storey. Comment: Bleeding Canker on Horse Chestnut. Category: standard photograph or close-up. Photographic equipment used: Canon EOS400D dSLR with Tamron SP AF Di 90mm Macro 1:1 lens.

Longitude (deg): -2.4. Latitude (deg): 50.6. Longitude (deg/min): 2° 30' W. Latitude (deg/min): 50° 40' N. Vice county name: Dorset. Vice county no.: 9. Country: England. Associated species: Cirsium arvense. Identified by: Malcolm Storey. Comment: Creeping Thistles with white colour diease. Category: standard photograph or close-up. Photographic equipment used: Canon EOS400D dSLR + Sigma 50mm 1:1 macro lens.

Chromatium (chrome-ace-ee-um) and Thiocystis (thigh-o-cyst-is) - red sulphur bacteria (or purple sulphur bacteria). They are found in sediments above the reduced zone. Both use solar energy to assist in the oxidation of hydrogen sulphide producing elemental sulphur which is deposited within the bacterial cell as sulphur granules. Photosynthetic pigments are pink which give the cells their colour. Chromatium are the larger spherical and elongate cells with larger sulphur granules, Thiocystis are smaller are not easy to distinguish from the detritus. Differential Interference Contrast.

Achromatium oxaliferum (Schewiakoff 1893), a large colorless sulpher bacterium. The larger refractile spherical structures are calcite spherolites and the small globules adhering to them are granules of elemental sulphur. Collected from bottom sediments of a stagnant freshwater pond near Boise, Idaho.

Aeromonas hydrophilaAeromonas hydrophila isolated from blood culture from a patient with severe diarrhoea. Cultured on C.L.E.D. agar.28 February 2012.From Wikimedia Commons

Caada del Hoyo, Castilla-La Mancha, Espaa

Common nameBacterial leaf streakScientific nameXanthomonas oryzae pv. oryzicola (Fang et al.) Swings et al.Part of the image collection of the International Rice Research Institute (IRRI).

Bacterial sheath brown rot.Part of the image collection of the International Rice Research Institute (IRRI).

Achromatium oxaliferum Achromatium oxaliferum is a large colorless sulpher bacterium containing large refractile structures of calcite spherulites. Collected from bottom sediments 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: Pond Demühlen, rain storage reservoir in Kiel-Russee (Schleswig-Holstein, Germany) Latitude: 54,304095 Longitude: 10,086073 Achromatium oxaliferum ist ein großes farbloses Schwefelbakterium mit großen lichtbrechenden Calziumoxalat-Kristallen. Aus Bodensedimenten eines Regenrückhaltebeckens in Kiel (Schleswig-Holstein, Germany). 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.

Longitude (deg): -1.1. Latitude (deg): 51.4. Longitude (deg/min): 1° 10' W. Latitude (deg/min): 51° 30' N. Vice county name: Berks. Vice county no.: 22. Country: England. Associated species: Aesculus hippocastanum. Identified by: Malcolm Storey. Comment: Bleeding Canker on Horse Chestnut. Category: standard photograph or close-up. Photographic equipment used: Canon EOS400D dSLR with Tamron SP AF Di 90mm Macro 1:1 lens.

Longitude (deg): -2.4. Latitude (deg): 50.6. Longitude (deg/min): 2° 30' W. Latitude (deg/min): 50° 40' N. Vice county name: Dorset. Vice county no.: 9. Country: England. Associated species: Cirsium arvense. Identified by: Malcolm Storey. Comment: Creeping Thistles with white colour diease. Category: standard photograph or close-up. Photographic equipment used: Canon EOS400D dSLR + Sigma 50mm 1:1 macro lens.

Delicious bacteria-infested food. :p