Quantification of viable cells of Clavibacter michiganensis subsp. michiganensis using a DNA binding dye and a real‐time PCR assay

Viable cells of Clavibacter michiganensis subsp. michiganensis (CMM), the causal agent of bacterial canker of tomato, were discriminated from the dead cells by quantitative real‐time polymerase chain reaction (PCR), after the bacterial solution was treated with the DNA binding dye ethidium monoazide...

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Published in:Plant pathology 2008-04, Vol.57 (2), p.332-337
Main Authors: Luo, L. X., Walters, C., Bolkan, H., Liu, X. L., Li, J. Q.
Format: Article
Language:English
Subjects:
bacterial canker of tomato
Bacterial plant pathogens
Biological and medical sciences
Clavibacter michiganensis
ethidium monoazide
Fundamental and applied biological sciences. Psychology
Lycopersicon esculentum
Phytopathology. Animal pests. Plant and forest protection
quantitative RT‐PCR
TaqMan probe
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container_end_page 337
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container_title Plant pathology
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creator Luo, L. X.
Walters, C.
Bolkan, H.
Liu, X. L.
Li, J. Q.
description Viable cells of Clavibacter michiganensis subsp. michiganensis (CMM), the causal agent of bacterial canker of tomato, were discriminated from the dead cells by quantitative real‐time polymerase chain reaction (PCR), after the bacterial solution was treated with the DNA binding dye ethidium monoazide (EMA). The primers and TaqMan probe, based on the 16S‐23S rDNA spacer sequences, were highly specific for CMM at the subspecies level. The detection limit of the direct real‐time PCR was 103 colony forming units per mL (cfu mL−1) in samples and with an apparent sensitivity of 2 cfu of target cells in PCR reaction solution. Application of this method allows for selective quantification of viable cells of CMM and facilitates monitoring the pathogen in tomato seeds.
doi_str_mv 10.1111/j.1365-3059.2007.01736.x
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subjects bacterial canker of tomato
Bacterial plant pathogens
Biological and medical sciences
Clavibacter michiganensis
ethidium monoazide
Fundamental and applied biological sciences. Psychology
Lycopersicon esculentum
Phytopathology. Animal pests. Plant and forest protection
quantitative RT‐PCR
TaqMan probe
title Quantification of viable cells of Clavibacter michiganensis subsp. michiganensis using a DNA binding dye and a real‐time PCR assay
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