摘要
研究了Hg2 + 、Cu2 + 、Cd2 + 、Cr (Ⅵ )和Pb2 + 对光合细菌沼泽红假单胞菌的 96h平均生长速度、细胞外渗液电导率、总蛋白质和细菌叶绿素含量的影响。结果表明 ,依据 5种重金属离子对该菌的 96h平均生长速度影响的实验结果 ,得出它们对该菌的毒性大小次序为Hg2 + >Cu2 + >Cd2 + >Cr (Ⅵ ) >Pb2 + 。在Hg2 + 、Cd2 + 、Cr (Ⅵ )和Pb2 + 的胁迫下 ,该菌细胞外渗液的电导率增加 ,且具剂量效应 ,而Cu2 + 并未使其细胞外渗液的电导率增加。Hg2 + 、Cu2 + 、Cd2 + 、Cr (Ⅵ )和Pb2 + 的胁迫均能导致该菌细菌叶绿素含量的降低 ,也存在剂量效应。但Hg2 + 、Cu2 + 、Cd2 + 、Cr (Ⅵ )和Pb2 + 的胁迫对该菌总蛋白质含量没有显著的的影响。
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
出处
《微生物学通报》
CAS
CSCD
北大核心
2003年第3期64-68,共5页
Microbiology China
基金
温州大学科研课题(No 0 10 5 10 0 0 3 )
关键词
重金属离子
沼泽红假单胞菌
生物效应
Heavy metal ions, Rhodopseudomonas palustris ,Biological effect
