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Unveiling Mycoviromes Using Fungal Transcriptomes.

Yeonhwa Jo1, Hoseong Choi2, Hyosub Chu3

  • 1College of Biotechnology and Bioengineering, Sungkyunkwan University, Seoburo 2066, Suwon 16419, Korea.

International Journal of Molecular Sciences
|September 23, 2022
PubMed
Summary

This study explored fungal viruses (mycoviruses) using public data, revealing extensive diversity in their genomes and hosts. Mycoviromes are complex, with some viruses showing unusual origins and interactions with fungal environments.

Keywords:
fungusmycovirustranscriptomeviromevirus

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Area of Science:

  • Mycology
  • Virology
  • Bioinformatics
  • Genomics

Background:

  • Viruses that infect fungi are known as mycoviruses.
  • Understanding mycovirus diversity and host interactions is crucial for fungal biology and biotechnology.

Purpose of the Study:

  • To conduct in silico mycovirome studies using public fungal transcriptomes.
  • To identify and characterize mycoviruses, their genomes, and host distributions.
  • To investigate the complexity and diversity of mycoviromes.

Main Methods:

  • In silico analysis of public fungal transcriptomes (mRNA libraries).
  • Identification of virus-associated contigs and assembly of viral genomes.
  • Phylogenetic analysis to determine host origins and genome organization.

Main Results:

  • Identification of 468 virus-associated contigs, 120 assembled viral genomes across diverse RNA and DNA types.
  • Discovery of mycoviruses with origins linked to fungi, insects, and plants.
  • Observation of low viral abundance/mutation but high complexity in mycovirome composition and populations.
  • Identification of significant variations in virus composition and abundance within Monilinia and Gigaspora species.
  • Potential roles of strigolactone in promoting and endobacteria in suppressing virus replication/mutation in Gigaspora.

Conclusions:

  • The study reveals significant diversity and complex host distribution of mycoviruses.
  • Mycoviromes exhibit intricate compositions, with dominant species often present despite coinfections.
  • Environmental factors like strigolactone and endobacteria symbiosis may influence mycovirus dynamics.