title: [Effect of light intensity on the content of bacteriochlorophyll and on the growth of phototrophic marine sulfur bacteria].
abstract: Eight strains of Chromatiaceae isolated from marine sediments are cultivated under light intensities of 50-5000 lx. A decreased in the light intensity brings about an increase in the specific bacteriochlorophyll content and also in the length of development. In certain strains, the increase in pigment contents partly compensates for the loss in light intensity, up to the maximum concentration of bacteriochlorophyll. This mechanism is only a physiological compatibility which ensures the survival of these organisms under feeble light intensities.
mesh_terms: D001429:Bacteriochlorophylls / Q000032:analysis*; D002734:Chlorophyll / Q000031:analogs & derivatives*; D002841:Chromatiaceae / Q000032:analysis / Q000254:growth & development / Q000528:radiation effects*; D002844:Chromatium / Q000032:analysis / Q000254:growth & development / Q000528:radiation effects*; D008027:Light; D012623:Seawater
chemical_list: D001429:Bacteriochlorophylls; D002734:Chlorophyll
vernacular_title: Influence de l'intensité lumineuse sur la teneur en bactériochlorophylle et sur la croissance de sulfobactéries phototrophes marines.