PMID: 9546155Apr 18, 1998Paper

Self-transmissible mercury resistance plasmids with gene-mobilizing capacity in soil bacterial populations: influence of wheat roots and mercury addition

Applied and Environmental Microbiology
E SmitJ D van Elsas

Abstract

A set of mercury resistance plasmids was obtained from wheat rhizosphere soil amended or not amended with mercuric chloride via exogenous plasmid isolation by using Pseudomonas fluorescens R2f, Pseudomonas putida UWC1, and Enterobacter cloacae BE1 as recipient strains. The isolation frequencies were highest from soil amended with high levels of mercury, and the isolation frequencies from unamended soil were low. With P. putida UWC1 as the recipient, the isolation frequency was significantly enhanced in wheat rhizosphere compared to bulk soil. Twenty transconjugants were analyzed per recipient strain. All of the transconjugants contained plasmids which were between 40 and 50 kb long. Eight selected plasmids were distributed among five groups, as shown by restriction digestion coupled with a similarity matrix analysis. However, all of the plasmids formed a tight group, as judged by hybridization with two whole-plasmid probes and comparisons with other plasmids in dot blot hybridization analyses. The results of replicon typing and broad-host-range incompatibility (Inc) group-specific PCR suggested tht the plasmid isolates were not related to any previously described Inc group. Although resistance to copper, resistance to streptomy...Continue Reading

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Citations

Sep 9, 2006·Environmental Microbiology·Sinéad M Ní ChadhainTamar Barkay
Apr 2, 2008·Applied and Environmental Microbiology·Frances R SlaterSarah L Turner
Aug 31, 2013·World Journal of Microbiology & Biotechnology·Shilpa S MujumdarBalu A Chopade
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Mar 8, 2012·FEMS Microbiology Reviews·Holger Heuer, Kornelia Smalla
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Feb 16, 2002·Environmental Microbiology·H Schmidt-EisenlohrC Baron
Mar 7, 2014·Environmental Microbiology Reports·Vincent TardyPierre-Alain Maron
May 15, 2016·MicrobiologyOpen·Enamul Hoque, Johannes Fritscher
Oct 27, 2007·Environmental Biosafety Research·Holger Heuer, Kornelia Smalla
Jun 30, 2011·FEMS Microbiology Reviews·Maria Pilar Garcillán-BarciaFernando de la Cruz
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Aug 4, 2019·Scientific Reports·Christian BrandtOliwia Makarewicz
Jul 12, 2001·Research in Microbiology·V C Nwosu

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