Phylogenetic positions of rust fungi parasitic on ferns: Evidence from 18S rDNA sequence analysis

Junta Sugiyama, Wellyzar Sjamsuridzal

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Molecular phylogenetic analyses of fern rusts were carried out based on 18S rDNA sequences. We sequenced the 18S rDNAs of fern rusts (Hyalopsora polypodii and Uredinopsis intermedia) and non-fern rusts (Aecidium epimedii, Coleosporium asterum, Ochropsora kraunhiae, Puccinia suzutake and Physopella ampelopsidis) and analyzed their phylogenetic relationships with other members of the Urediniomycetes. Our bootstrapped neighbor-joining tree obtained from these analyses showed that rust fungi were apparently monophyletic at high confidence level (100% bootstrap confidence). In this molecular phylogenetic tree, the two fern rusts did not occupy the basal position within the rust fungal lineage and did not form a monophyletic lineage. Two species of the Cronartiaceae (Peridermium harknessii, Cronartium ribicola) and one species of the Coleosporiaceae (Coleosporium asterum) grouped with the fern rusts. Therefore, our results suggested that the two fern rusts were not primitive. On the other hand, Mixia osmundae, which is parasitic on the primitive fern Osmunda, was phylogenetically far from the fern rusts.

Original languageEnglish
Pages (from-to)21-27
Number of pages7
JournalMycoscience
Volume40
Issue number1
DOIs
Publication statusPublished - 15 Feb 1999

Keywords

  • 18S rDNA
  • Fern parasites
  • Molecular phylogenetics
  • Rust fungi
  • Urediniomycetes

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