J Microbiol Methods. 2005 Feb;60(2):217-24.

Quantification of the Pseudomonas population in New Zealand soils by fluorogenic PCR assay and culturing techniques.

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Landcare Research, PO Box 69, Lincoln 8152, New Zealand. lloyd-jonesg@landcareresearch.co.nz

Abstract

The genus Pseudomonas contains fast-growing nutritionally versatile bacteria that are able to utilize a wide variety of carbon sources. The ubiquity of the genus has been highlighted by conventional microbiology and the genus is well represented in collections of cultured bacteria. Here we evaluate the Pseudomonas population in New Zealand soils by comparing a culture-independent (real-time PCR combined with fluorescent TaqMan technology) with a culture-dependent (Gould's S1) population estimate. We show that cultivated fluorescent pseudomonads are not numerically dominant and represent a small proportion of <1% of the total Pseudomonas population, and that the total Pseudomonas population itself represents only a small proportion of <1% of the total bacterial population.

PMID:: 15590096; [PubMed - indexed for MEDLINE]

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