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Purification of High Molecular Weight Genomic DNA from Powdery Mildew for Long-Read Sequencing
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Purification of High Molecular Weight Genomic DNA from Powdery Mildew for Long-Read Sequencing

Published on: March 31, 2017

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Early evolution of endoparasitic group in powdery mildews: molecular phylogeny suggests missing link between

Susumu Takamatsu1, Siska A S Siahaan2, Onésimo Moreno-Rico3

  • 1Department of Bioresources, Graduate School, Mie University, 1577 Kurima-machiya, 514-8507 Japan takamatu@bio.mie-u.ac.jp.

Mycologia
|June 16, 2016
PubMed

Insights

Powdery mildews evolved from ectoparasitic to endoparasitic forms, with Leveillula emerging from Phyllactinia. Phylogenetic analysis suggests a missing link in Leveillula

Area of Science:

  • Mycology
  • Evolutionary Biology
  • Plant Pathology

Background:

  • Erysiphaceae family includes 17 genera, with only four exhibiting endoparasitism.
  • Understanding the evolution of endoparasitism in powdery mildews is crucial for fungal biology.
  • Phyllactinieae tribe contains genera with varying degrees of endoparasitism.

Purpose of the Study:

  • To investigate the early evolution of endoparasitism in powdery mildews.
  • To perform molecular phylogenetic analyses of the Phyllactinieae tribe.
  • To clarify taxonomic relationships and propose new species/combinations.

Main Methods:

  • Molecular phylogenetic analyses using collected powdery mildew samples.
  • Phylogenetic tree construction to infer evolutionary relationships.
  • Comparative analysis of conidial morphology.

Main Results:

  • The Pleochaeta/Queirozia group is the most ancestral in Phyllactinieae.
  • Phyllactinia evolved from the Pleochaeta/Queirozia group.
  • Leveillula, a truly endoparasitic genus, emerged from a part of Phyllactinia.
  • A basal group with dimorphic conidia gave rise to a group without dimorphic conidia.
  • Sister taxa to Leveillula are in North and South America, suggesting a missing link for its presumed origin.

Conclusions:

  • Powdery mildews show a clear evolutionary path from ectoparasitism to endoparasitism.
  • Leveillula's evolution from Phyllactinia is supported, but its geographic origin remains unclear.
  • New species and taxonomic re-allocations within Phyllactinia are proposed based on phylogenetic findings.
Keywords:
ErysiphaceaeErysiphalesPhyllactinieaePleochaetaQueirozia

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