Description of a new polymer-secreting bacterium from a deep-sea hydrothermal vent, Alteromonas macleodii subsp. fijiensis, and preliminary characterization of the polymer

Article Abstract:

A novel Alteromonas macleodii subspecies called fijiensis has been discovered in the fluid of a deep-sea hydrothermal vent. The bacteria is mesophilic, aerobic, heterotrophic, and gram-negative with a polar flagellum. The bacterium secretes a polysaccharide with a high molecular weight in the presence of glucose in the batch cultures. The viscosity of the polysaccharide is similar to that of xanthan. The polysaccharide contains glucose, mannose, pyruvated mannose, galactose, galacturonic acid, and glucuronic acid.

Microbial polysaccharides, Bacteria, Aerobic, Aerobic bacteria

---

Bacterial filament formation, a defense mechanism against flagellate grazing, is growth rate controlled in bacteria of different phyla

Article Abstract:

The interaction between Flectobacillus sp. strain MWH38 with Ochromonas sp. strain DS under chemostatic conditions. The former is a facultatively filamentous, grazing-protected freshwater bacterium while the latter is a bacterivorous flagellate. Results indicate that filament formation by the two bacteria is controlled by growth rate and occurs even in the presence of a predator. Flagellate grazing decreased bacterial biomass and indirectly stimulated filament formation.

Analysis, Physiological aspects, Microbial metabolism, Bacterial growth, Marine bacteria

---

Identification of a Thiomicrospira denitrificans-like epsilonproteobacterium as a catalyst for autotrophic denitrification in the Central Baltic Sea

Article Abstract:

A newly developed approach consisting of molecular analyses was used to focus on autotrophic denitrification in the Central Baltic Sea. With this method, the bacteria responsible for autotrophic denitrification as a single taxon, an epsilonproteobacterium related to the autotrophic denitrified Thiomicrospira denitrificans was identified.

Environmental aspects, Observations, Denitrification, Baltic Sea, Autotrophs

Similar abstracts:

• Abstracts: Novel, attached, sulfur-oxidizing bacteria at shallow hydrothermal vents possess vacuoles not involved in respiratory nitrate accumulation
• Abstracts: Selecting lactic acid bacteria for their safety and functionality by use of a mouse colitis model. Application of measurements of transepithelial electrical resistance of intestinal epithelial cell monolayers to evaluate probiotic activity
• Abstracts: Effective heat inactivation of Mycobacterium avium subsp. paratuberculosis in raw milk contaminated with naturally infected feces
• Abstracts: Numerical taxonomy of gram-negative, nonmotile, nonfermentative bacteria isolated during chilled storage of lamb carcasses
• Abstracts: Correlation of biological activity and reactor performance in biofiltration of toluene with the fungus Paecilomyces variotii CBS115145

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.