铬对铜绿假单胞菌生长的影响。

Effect of chromium on growth of Pseudomonas aeruginosa.

作者信息

Nair S, Krishnamurthi V S

机构信息

Bacteriology Laboratory, Central Leather Research Institute, Madras, India.

出版信息

Indian J Exp Biol. 1991 Feb;29(2):140-4.

PMID:1907947

Abstract

Tolerance level to trivalent chromium-Cr(salen)(H2O)2+ and hexavalent chromium-K2Cr2O7 was assessed in P. aeruginosa isolated from tannery effluent soil. It could tolerate 80 and 100 ppm in liquid cultures and up to 100 and 200 ppm in plate count agar in the presence of trivalent and hexavalent chromium respectively. Unadapted cells took a longer time to grow than adapted cells in the presence of K2Cr2O7. Chromium influenced the cellular contents, morphology and respiration of P. aeruginosa. The chosen trivalent salt of chromium was more toxic than the hexavalent one.

摘要

对从制革厂废水污染土壤中分离出的铜绿假单胞菌评估了其三价铬-Cr(salen)(H2O)2+和六价铬-K2Cr2O7的耐受水平。在液体培养中，它分别能耐受80 ppm和100 ppm的三价铬和六价铬，在平板计数琼脂中分别能耐受高达100 ppm和200 ppm的三价铬和六价铬。在存在K2Cr2O7的情况下，未适应的细胞比适应的细胞生长所需时间更长。铬影响了铜绿假单胞菌的细胞内容物、形态和呼吸。所选的三价铬盐比六价铬盐毒性更大。