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Pseudomonas fluorescens is a common Gram-negative, rod-shaped bacterium. [1] It belongs to the Pseudomonas genus; 16S rRNA analysis as well as phylogenomic analysis has placed P. fluorescens in the P. fluorescens group within the genus, [2] [3] to which it lends its name.
Alcaligenes faecalis is a species of Gram-negative, rod-shaped bacteria commonly found in the environment.It was originally named for its first discovery in feces, but was later found to be common in soil, water, and environments in association with humans.
A bacillus (pl.: bacilli), also called a bacilliform bacterium or often just a rod (when the context makes the sense clear), is a rod-shaped bacterium or archaeon. Bacilli are found in many different taxonomic groups of bacteria. However, the name Bacillus, capitalized and italicized, refers to a specific genus of bacteria.
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Rhodovulum sulfidophilum is a gram-negative purple nonsulfur bacteria. [1] The cells are rod-shaped, and range in size from 0.6 to 0.9 μm wide and 0.9 to 2.0 μm long, and have a polar flagella. These cells reproduce asexually by binary fission.
The generic name Pseudomonas created for these organisms was defined in rather vague terms by Walter Migula in 1894 and 1900 as a genus of Gram-negative, rod-shaped, and polar-flagellated bacteria with some sporulating species. [7] [8] The latter statement was later proved incorrect and was due to refractive granules of reserve materials. [9]
Bacterial morphological plasticity refers to changes in the shape and size that bacterial cells undergo when they encounter stressful environments. Although bacteria have evolved complex molecular strategies to maintain their shape, many are able to alter their shape as a survival strategy in response to protist predators, antibiotics, the immune response, and other threats.
The name Cytobacillus can be broken down into the prefix "cyto-" (from the Greek noun kytos, referring to hollow, vessel, jar or a cell in biology) and the suffix "-bacillus" (from the Latin noun bacillus, referring to a small staff or rod and Bacillus, the bacterial genus). Together, Cytobacillus refers to a rod-shaped cell.