[논문]A competitive PCR-based method for the detection and quantification of Erwinia carotovora subsp. atroseptica on potato tubers

Hyman, L.J.; Birch, P.R.J.; Dellagi, A.; Avrova, A.O.; Toth, I.K.

doi:10.1046/j.1472-765x.2000.00736.x

A competitive PCR-based method for the detection and quantification of Erwinia carotovora subsp. atroseptica on potato tubers

Letters in applied microbiology, v.30 no.4, 2000년, pp.330 - 335

Hyman, L.J. , Birch, P.R.J. , Dellagi, A. , Avrova, A.O. , Toth, I.K.

Abstract ▼ AI-Helper

A PCR-based method was developed for the simultaneous detection and quantification of the potato pathogen Erwinia carotovora subsp. atroseptica (Eca) on potato tubers. The method incorporates a competitor PCR template cloned into Escherichia coli in vector pGEM-T (E. coli 4R l/l). Predetermined numbers of E. coli 4R were added to potato peel extract, either pre-inoculated with Eca or from naturally contaminated tubers, and Eca numbers estimated by comparing the ratio of products generated from Eca target DNA and competitor template DNA following PCR. Estimates of Eca numbers were consistent with counts obtained on crystal violet pectate medium and immunofluorescence colony staining. Unlike these methods, however, the PCR-based method is not affected by the presence of other erwinias and saprophytes and is able to detect all serogroups of Eca. Based on this method, a key was produced relating product ratios, obtained following PCR from contaminated tuber stocks, to the likelihood of blackleg disease incidence. This is the first quantitative PCR-based detection method described for Eca and is the first for any bacterial plant pathogen to incorporate a DNA extraction control.

참고문헌 (24)

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A competitive PCR-based method for the detection and quantification of Erwinia carotovora subsp. atroseptica on potato tubers

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