Gammaproteobacteria is a class of several medically, ecologically and scientifically important groups of bacteria, such as the Enterobacteriaceae ( ), Escherichia coli Vibrionaceae and Pseudomonadaceae. An exceeding number of important pathogens belongs to this class, e.g. ( Salmonella enteritis and typhoid fever), (plague), Yersinia pestis (cholera), Vibrio cholerae (lung infections in hospitalised or Pseudomonas aeruginosa cystic fibrosis patients), and responsible for causing Klebsiella pneumoniae pneumonia. Important plant pathogens such as Xanthomonas axonopodis pv. citri ( citrus canker) and Pseudomonas syringae pv. actinidiae ( kiwifruit Psa outbreak) are also Gammaproteobacteria. Like all Proteobacteria, the Gammaproteobacteria are Gram-negative.
Significance [ edit ]
The Gammaproteobacteria comprise several medically and scientifically important groups of bacteria, such as the
Enterobacteriaceae, Vibrionaceae and Pseudomonadaceae. A number of important pathogens belongs to this class, e.g. spp. ( Salmonella enteritis and typhoid fever), (plague), Yersinia pestis (cholera), Vibrio cholerae (lung infections in hospitalized or Pseudomonas aeruginosa cystic fibrosis patients), and (food poisoning). Members of Escherichia coli Chromatium are photosynthetic and oxidize hydrogen sulfide instead of water, producing sulfur as excrement. Some Gammaproteobacteria are methane oxidizers, and many of them are in symbiosis with geothermic ocean vent dwelling animals. [1 ]
Phylogeny [ edit ]
Due to a single genus,
Acidithiobacillus, Gammaproteobacteria is paraphyletic to Betaproteobacteria (reviewed in Proteobacteria#Taxonomy).
Phylogeny of Gammaproteobacteria
Phylogeny of Gammaproteobacteria after
Not all orders are monophyletic, consequently families or genera are shown for Pseudomonadales, Oceanospirillales, Alteromonadales. In the case of singleton orders, the genus is shown. (In [2 ] bacterial taxonomy, orders have the suffix -ales, while families have -aceae.)
See also [ edit ]
References [ edit ]
External links [ edit ]