This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Reprints and Permissions Copyright Information Books from ASM Press MicrobeWorld Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Wipat, A Articles by Saunders, V A Search for Related Content PubMed PubMed Citation Articles by Wipat, A Articles by Saunders, V A Agricola Articles by Wipat, A Articles by Saunders, V A

 Previous Article  |  Next Article 

Appl Environ Microbiol. 1991 November; 57(11): 3322-3330

Streptomyces marker plasmids for monitoring survival and spread of streptomycetes in soil.

School of Natural Sciences, Liverpool Polytechnic, United Kingdom.

ABSTRACT

Plasmid constructs pNW1 through pNW6 containing a controllable xylE gene (for catechol 2,3-dioxygenase) were introduced into Streptomyces lividans strains to provide a selectable marker system. xylE functions in S. lividans under the control of bacteriophage lambda promoters lambda pL and lambda pR. Thermoregulated expression of xylE is provided through the lambda repressor cI857. Catechol 2,3-dioxygenase activity was increased 2.8-fold from plasmid construct pNW2 (lambda pL, xylE, cI857) and 9.5- and 7.4-fold from constructs pNW3 (lambda pR, xylE, cI857) and pNW5 (lambda pR, xylE, cI857), respectively, when the temperature was shifted from 28 degrees C to 37 degrees C. The stability of the constructs varied from 4.7% for pNW2 to 99.4% for pNW4 (lambda pL, xylE) over two rounds of sporulation. Marked S. lividans strains released into soil systems retained the XylE phenotype for more than 80 days, depending on the marker plasmid, when examined by a selective plating method. Furthermore, S. lividans harboring plasmid pNW5 was detectable by nucleic acid hybridization at less than 10 CFU g-1 (dry weight) of soil as mycelium and 10(3) CFU g-1 (dry weight) of soil as spores with the xylE marker DNA extracted from soil and amplified by using the polymerase chain reaction.

This article has been cited by other articles:

• Kuske, C. R., Banton, K. L., Adorada, D. L., Stark, P. C., Hill, K. K., Jackson, P. J. (1998). Small-Scale DNA Sample Preparation Method for Field PCR Detection of Microbial Cells and Spores in Soil. Appl. Environ. Microbiol. 64: 2463-2472 [Abstract] [Full Text]