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ITS primers with enhanced specificity for basidiomycetes ‐ application to the identification of mycorrhizae and rusts

GARDES, M., BRUNS, T. D.·1993·Molecular Ecology

Abstract

We have designed two taxon‐selective primers for the internal transcribed spacer (ITS) region in the nuclear ribosomal repeat unit. These primers, ITS1‐F and ITS4‐B, were intended to be specific to fungi and basidiomycetes, respectively. We have tested the specificity of these primers against 13 species of ascomycetes, 14 of basidiomycetes, and 15 of plants. Our results showed that ITS4‐B, when paired with either a ‘universal’ primer ITS1 or the fungal‐specific primer ITS1‐F, efficiently amplified DNA from all basidiomycetes and discriminated against ascomycete DNAs. The results with plants were not as clearcut. The ITS1‐F/ITS4‐B primer pair produced a small amount of PCR product for certain plant species, but the quantity was in most cases less than that produced by the ‘universal’ ITS primers. However, under conditions where both plant and fungal DNAs were present, the fungal DNA was amplified to the apparent exclusion of plant DNA. ITS1‐F/ITS4‐B preferential amplification was shown to be particularly useful for detection and analysis of the basidiomycete component in ectomycorrhizae and in rust‐infected tissues. These primers can be used to study the structure of ectomycorrhizal communities or the distribution of rusts on alternate hosts.

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Research works printed but not linked: 22

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Metadata

Authors
GARDES, M., & BRUNS, T. D.
Venue
Molecular Ecology
Publisher
Wiley
Published
1993-04
Volume
2
Issue
2
Pages
113-118
ISSN
  • 0962-1083 (ISSN-L)
  • 1365-294X
OpenAlex
W2130889389
Cited by
10,480
References
0
FWCI
31.45
Type
journal article
Language
en
Open access
closed

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