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Exploring Environmental Microfungal Diversity Through Serial Single Cell Screening.

Joana Mariz1, Ali Nawaz1,2, Yvonne Bösch1

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|January 20, 2025
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Summary
This summary is machine-generated.

Researchers developed a new framework to explore fungal biodiversity, identifying 60 potential new fungal taxa from aquatic environments. This method addresses challenges with unknown and unculturable fungi, advancing our understanding of fungal diversity.

Keywords:
aquatic hyphomycetesbarcodingbiodiversitydark fungal taxalaser microdissectionribosomal operonsingle cell genomicstaxonomy

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Area of Science:

  • Mycology
  • Molecular Biology
  • Environmental Science

Background:

  • The fungal kingdom exhibits vast, largely unexplored biodiversity, with predicted undescribed species far outnumbering known ones.
  • Discovering novel fungal taxa is hindered by sampling biases and methodological limitations, particularly for cryptic or unculturable species.

Purpose of the Study:

  • To present a novel framework combining taxonomic knowledge, molecular techniques, and data processing for exploring fungal biodiversity.
  • To investigate enigmatic aquatic fungal lineages and identify previously unknown fungal taxa using an innovative approach.

Main Methods:

  • Serial screening of environmental fungal cells followed by microscopic documentation.
  • DNA analysis of laser micro-dissected cells, including ribosomal operon barcoding via long-read sequencing and optional whole genome sequencing.
  • Application of the framework to aquatic hyphomycetes from environmental samples.

Main Results:

  • Identification of 60 potentially new fungal taxa within the screened aquatic fungal dataset.
  • Demonstration of a robust methodology for characterizing molecular barcodes of previously unknown fungal taxa.
  • Successful application to aquatic fungal lineages, highlighting the framework's potential for broader use.

Conclusions:

  • The developed framework offers a promising solution for exploring unknown and unculturable fungi, overcoming traditional limitations.
  • This approach is expected to significantly advance the characterization of fungal diversity across various habitats.
  • The methodology holds potential for application to other undescribed microeukaryotic lineages, expanding our understanding of global biodiversity.