A FEW BIOLOGICAL EFFECTS OF SOME HEAVY METAL IONS ON PHTOSYNTHETIC BACTERIUM RHODOPSEUDOMONAS PALUSTRIS / 微生物学通报

ABSTRACT

It was studied that effects of Hg 2+ ,Cu 2+ ,Cd 2+ ,Cr(Ⅵ) and Pb 2+ on 96h average growth rate,conductivity of osmotic luquor and total protein and bacteriochlorophyll content of our Rhodopseudomonas palustris The results showed that the toxicity sequence of these heavy metal ions from high to low is Hg 2+ , Cu 2+ , Cd 2+ ,Cr(Ⅵ)and Pb 2+ according to the results of effects of 5 heavy metal ions on 96h average growth rate of this strain;forcing of Hg 2+ , Cd 2+ ,Cr(Ⅵ) and Pb 2+ lead to increasing of conductivity of osmotic luquor ,and this effect has dose response,but that of Cu 2+ doesn't ;forcing of 5 heavy metal ions could result in reducing of bacteriochlorophyll content,and this effect also has dose response But forcing of 5 heavy metal ions hasn't marked effect on total protein content