Identification of Lophodermium seditiosum and L. pinastri in Swedish forest nurseries using species-specific PCR primers from the ribosomal ITS region

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Lophodermium seditiosum is a serious needle pathogen on pine, particularly in nurseries, and there is a need to detect the pathogen during its latent phase. The internal transcribed spacer (ITS) regions of the rDNA of L. seditiosum and L. pinastri were amplified with universal primers and sequenced. Sequence comparisons of the two species allowed the design of species-specific primers for the ITS regions. The primers were between 18 and 24 bp long with a minimum of 3 bp differences between the species. These primer pairs did not give any amplification of DNA from any other of the examined fungal species or from healthy Pinus sylvestris needles. It was also possible to identify either L. seditiosum or L. pinastri in infected needles with and without signs of infection using these primer pairs. The method was found to be very useful for detection of latent infections of L. seditiosum in P. sylvestris needles in nurseries.

Document Type: Research Article


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Publication date: June 1, 2005

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