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Pestalotiopsis revisited.

S S N Maharachchikumbura1, K D Hyde1, J Z Groenewald2

  • 1Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming 650201, China ; World Agroforestry Centre, China & East-Asia Office, 132 Lanhei Road, Kunming 650201, China ; Institute of Excellence in Fungal Research, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand.

Studies in Mycology
|December 11, 2014
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Summary
This summary is machine-generated.

Researchers reclassified the fungal genus Pestalotiopsis, creating two new genera, Neopestalotiopsis and Pseudopestalotiopsis. This taxonomic revision, based on DNA and morphology, introduces 37 new fungal species.

Keywords:
AmphisphaeriaceaeNew speciesPestalosphaeriaPestalotiaPhylogenyTaxonomy

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Area of Science:

  • Mycology
  • Fungal Taxonomy
  • Molecular Phylogenetics

Background:

  • Pestalotiopsis fungi are common plant pathogens known for producing diverse chemical metabolites.
  • Investigated 91 Pestalotiopsis isolates from the CBS-KNAW Fungal Biodiversity Centre collection.
  • Previous taxonomic classifications required revision to reflect natural groupings within Amphisphaeriaceae.

Purpose of the Study:

  • To revise the taxonomy of the fungal genus Pestalotiopsis.
  • To establish new genera and species based on phylogenetic and morphological data.
  • To improve the classification of Amphisphaeriaceae fungi.

Main Methods:

  • Phylogenetic analysis using 28S nrRNA gene (LSU) sequence data.
  • Combined morphological and DNA analyses (ITS, β-tubulin (TUB), and translation elongation factor 1-alpha (TEF) gene regions).
  • Segregation of novel genera Neopestalotiopsis and Pseudopestalotiopsis from Pestalotiopsis.

Main Results:

  • Two novel genera, Neopestalotiopsis and Pseudopestalotiopsis, were segregated from Pestalotiopsis.
  • Distinct morphological characteristics (conidiogenous cells, median conidial cell color) differentiate the three genera.
  • Phylogenetic analysis revealed 30 clades in Neopestalotiopsis and 43 clades in Pestalotiopsis.
  • 11 new species in Neopestalotiopsis, 24 in Pestalotiopsis, and two in Pseudopestalotiopsis were introduced.
  • New combinations were proposed to emend the monophyly of the genera.

Conclusions:

  • The study established a more natural classification for Pestalotiopsis and related fungi.
  • The segregation of Neopestalotiopsis and Pseudopestalotiopsis provides clearer taxonomic boundaries.
  • The introduction of numerous new species expands our understanding of fungal biodiversity and potential metabolite production.