当前位置： SCI文献检索 > JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY期刊下所有文献 > Colonization of contaminated soil by an introduced bacterium: effects of initial pentachlorophenol levels on the survival of Sphingomonas chlorophenolica strain RA2.

Colonization of contaminated soil by an introduced bacterium: effects of initial pentachlorophenol levels on the survival of Sphingomonas chlorophenolica strain RA2.

Abstract：

:The survival of a Sphingomonas species that was introduced into pentachlorophenol (PCP)-contaminated soil was monitored with two complementary methods, a respiration-based assay and a most probable number (MPN) technique. Sphingomonas chlorophenolicastrain RA2 is a PCP-mineralizing bacterium that was introduced into soil contaminated with a range of PCP concentrations (0-300 &mgr;g PCP g(-1) soil). The population of introduced microorganisms was followed for 170 days using a substrate-induced growth-response method and a MPN assay that specifically targets PCP-mineralizing bacteria. Varying the initial PCP concentration resulted in the emergence of three distinct patterns of survival. In soil contaminated with 300 &mgr;g PCP g(-1) the population of S. chlorophenolica strain RA2 immediately declined following introduction, increased by 200-fold and leveled off by the end of the 170-day incubation. In contrast, populations of S. chlorophenolica strain RA2 declined to levels below detection limits in uncontaminated soil by the end of the experiment. Intermediate PCP concentrations (10-100 &mgr;g PCP g(-1) soil) resulted in the establishment of S. chlorophenolica strain RA2 that slowly declined in numbers. These results indicate that Sphingomonas chlorophenolica strain RA2 is an effective colonizer of PCP-contaminated soil but will not persist in the absence of PCP.

journal_name

J Ind Microbiol Biotechnol

journal_title

Journal of industrial microbiology & biotechnology

authors

Colores GM,Schmidt SK

doi

10.1038/sj.jim.2900718

subject

Has Abstract

pub_date

1999-10-01 00:00:00

pages

326-331

issue

4-5

eissn

1367-5435

issn

1476-5535

journal_volume

23

pub_type

杂志文章

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