European Journal of Plant Pathology

, Volume 112, Issue 4, pp 337–347 | Cite as

A PCR-based assay for the detection and identification of Pyrenochaeta lycopersici

Article
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Abstract

The isolation of Pyrenochaeta lycopersici, causal agent of corky root of tomato, is difficult because of its slow growth and poor sporulation. Identification is complicated due the existence of two morphologically similar forms, Types 1 and 2, that differ in several physiological and molecular features. For the rapid and unambiguous identification of isolates, two oligonucleotide primer pairs were designed using ITS region sequences. Specific PCR products of 147 and 209 bp were obtained for isolates of Type 1 and Type 2, respectively. Specificity of both primer pairs was verified using several fungal and bacterial species. As little as 0.7 pg of target DNA could be detected with the protocol. A nested PCR procedure was necessary for the detection of the fungus in plant tissue. This technique will be of use in epidemiological studies and in the implementation of control strategies.

Key words

corky-root molecular diagnosis ribosomal DNA sequence analysis tomato 
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Copyright information

© Springer 2005

Authors and Affiliations

  1. 1.Istituto Sperimentale per la Patologia Vegetale (I.S.Pa.Ve.)RomeItaly

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