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Aspergillus fumigatus, One Uninucleate Species with Disparate Offspring

François Danion1,2,3, Norman van van Rhijn4, Alexandre C Dufour5

  • 1Unité des Aspergillus, Institut Pasteur, 75015 Paris, France.

Journal of Fungi (Basel, Switzerland)
|January 9, 2021
PubMed

Insights

Fungal infection by Aspergillus fumigatus requires conidial germination. This study reveals that Aspergillus fumigatus conidial germination is asynchronous, a crucial process for the fungus

Area of Science:

  • Mycology
  • Infectious Diseases
  • Cell Biology

Background:

  • * Establishment of fungal infections, such as those caused by *Aspergillus fumigatus*, depends on the germination of airborne conidia after respiratory tract penetration.
  • * Conidial germination features in filamentous fungi, including *A. fumigatus*, are not well understood.
  • * Understanding fungal germination is critical for developing targeted antifungal therapies.

Purpose of the Study:

  • * To investigate the characteristics of *Aspergillus fumigatus* conidial germination.
  • * To determine if germination parameters can be modified by environmental or genetic factors.
  • * To assess the significance of germination asynchrony in the fungal life cycle.

Main Methods:

  • * Microscopic observation of *A. fumigatus* conidia under various conditions.
  • * Manipulation of nutritional environments.
  • * Generation of gene deletion mutants to study germination pathways.

Main Results:

  • * *Aspergillus fumigatus* conidial germination was observed to be asynchronous.
  • * Germination asynchrony persisted despite modifications to the nutritional environment and extensive gene deletions.
  • * While germination parameters can be altered, the inherent asynchrony remained a constant feature.

Conclusions:

  • * Conidial germination in *A. fumigatus* is an asynchronous process.
  • * This asynchrony is maintained across different tested conditions and genetic modifications.
  • * The underlying causes of germination asynchrony are currently unknown but are essential for the fungal life cycle completion.
Keywords:
Aspergillus fumigatusaspergillosisasynchronyconidiumgerminationtranscriptome

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