MeSH definition : A genus of gram-negative, ovoid to rod-shaped bacteria that is phototrophic. All species
use ammonia as a nitrogen source. Some strains are found only in sulfide-containing
freshwater habitats exposed to light while others may occur in marine, estuarine,
and freshwater environments.;
MeSH annotation : in water;
Wikipedia link : https://en.wikipedia.org/wiki/Chromatium;
A genus of gram-negative, ovoid to rod-shaped bacteria that is phototrophic. All species
use ammonia as a nitrogen source. Some strains are found only in sulfide-containing
freshwater habitats exposed to light while others may occur in marine, estuarine,
and freshwater environments.