一株联苯降解菌的特性及鉴定

Characterization and Identification of a Biphenyl Degrading Strain

从华北油田污染土壤中筛选出一株能够以联苯为唯一碳源和能源生长的菌株。该菌生长的最适联苯浓度为 0 2 %～ 0 4% ,在联苯浓度为 0 1 %的培养基中培养 36h后降解率达99 8%。该菌还可以降解苯甲酸钠、邻苯二酚、间苯二酚、对苯二酚和多氯联苯Aroclor1 2 2 1、Aroclor1 2 4 2等芳香族化合物。通过 1 6SrDNA基因序列分析鉴定该菌为嗜吡啶红球菌 (Rhodo coccuspyridinovorans)

R04, a Gram-positive bacterium, which can use biphenyl as the sole carbon source, was isolated from soil contaminated with oil in northern China. The bacterium has high biphenyl degradation efficiency and also can degrade polychlorinated biphenyl congeners, Aroclor1221 and Aroclor 1242. The bacterium was identified as Rhodococcus pyridinovorans by the method of 16S rDNA gene sequencing (accession No. AY072745).