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Related Concept Videos

Septins01:19

Septins

Septins are protein filaments forming the cytoskeleton along with the microtubules, microfilaments, intermediate filaments, and other accessory proteins. In 1971 while studying the cell division cycle in mutant Saccharomyces cerevisiae Harwell et al. first identified the septin-related genes playing a crucial role in yeast cytokinesis. Fluorescence microscopy revealed that these proteins localize at the budding neck as rings. These ring-like proteins were then named Septins by John Pringle, and...

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Related Experiment Video

Updated: May 8, 2026

Bottom-Up In Vitro Methods to Assay the Ultrastructural Organization, Membrane Reshaping, and Curvature Sensitivity Behavior of Septins
09:09

Bottom-Up In Vitro Methods to Assay the Ultrastructural Organization, Membrane Reshaping, and Curvature Sensitivity Behavior of Septins

Published on: August 17, 2022

Sizing up Septoria.

W Quaedvlieg1, G J M Verkley, H-D Shin

  • 1CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands ; Wageningen University and Research Centre (WUR), Laboratory of Phytopathology, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands; Microbiology, Department of Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands.

Studies in Mycology
|September 10, 2013
PubMed
Summary
This summary is machine-generated.

This study redefines fungal genera like Septoria, Stagonospora, and others using molecular data, establishing new genera and species to improve fungal classification. The research clarifies phylogenetic relationships, leading to a revised understanding of these plant pathogenic fungi.

Keywords:
CapnodialesMulti-Locus Sequence Typing (MLST)MycosphaerellaMycosphaerellaceaePhaeoseptoriaPhaeosphaeriaPhaeosphaeriaceaePleosporalesSeptoriaSphaerulinaStagonosporasystematics

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Area of Science:

  • Mycology
  • Plant Pathology
  • Molecular Systematics

Background:

  • Septoria fungi are widespread plant pathogens causing leaf spots and stem cankers.
  • Existing generic boundaries for Septoria and related genera were unclear.
  • Previous classifications lacked robust phylogenetic support.

Purpose of the Study:

  • To resolve the phylogenetic generic limits of Septoria, Stagonospora, Sphaerulina, Phaeosphaeria, and Phaeoseptoria.
  • To establish a clear taxonomic framework for these important plant pathogenic fungi.
  • To utilize multi-gene sequence data for accurate phylogenetic reconstruction.

Main Methods:

  • Phylogenetic analysis using partial 28S nuclear ribosomal RNA and RPB2 gene sequences.
  • Generation of nucleotide sequence data for five gene loci: ITS, LSU, EF-1α, RPB2, and Btub.
  • Comparative analysis of sequence data from a large set of fungal isolates.

Main Results:

  • Septoria is confirmed as a distinct genus within Mycosphaerellaceae.
  • Several species previously assigned to Septoria are reclassified into Sphaerulina.
  • Phaeosphaeria and Phaeoseptoria are found to be congeneric, with Phaeoseptoria synonymized under Phaeosphaeria.
  • A new genus, Parastagonospora, is introduced for Septoria avenae and Depazea nodorum.
  • The study resolved 47 clades/genera, introducing 14 new genera, 36 new species, and 19 new combinations.

Conclusions:

  • The study provides a robust phylogenetic framework for Septoria and related genera.
  • This taxonomic revision clarifies the evolutionary relationships and classification of numerous plant pathogenic fungi.
  • The introduction of new genera and species enhances our understanding of fungal diversity and evolution.