Effects of heavy metals salts on growth and velocity of oxygen uptake by the cells of green sulfur bacteria Chlorobium limicola Ya-2002

Growth of phototrophic green sulfur bacteria Chlorobium limicola Ya-2002 under the influence of heavy metals salts different concentrations is investigated. The addition of CdSO 4 , ZnSO 4 , Pb(NO 3 ) 2 or CuSO 4 to the medium inhibits the bacterial biomass accumulation. The velocity of oxygen uptake by C . limicola Ya-2002 during the growth in the media with metals salts is determined. It is affected to the largest extent by the addition of 2.5 mM of Pb(NO 3 ) 2 to the growth medium. Keywords: phototrophs, green sulfur bacteria, Chlorobium limicola Ya-2002, toxi­city, oxygen uptake, heavy metals.