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Efficient Extraction Method for High Quality Fungal RNA from Complex Lignocellulosic Substrates.

Miia R Mäkelä1,2, Kristiina Hildén3

  • 1Department of Microbiology, University of Helsinki, Helsinki, Finland. miia.r.makela@helsinki.fi.

Methods in Molecular Biology (Clifton, N.J.)
|June 8, 2018
PubMed
Summary

This study presents a robust method for extracting high-quality fungal RNA from challenging plant materials. The technique ensures pure RNA, ideal for gene expression studies like RNA sequencing.

Keywords:
BasidiomycetesCesium chlorideFungiLignocellulosePlant biomassRNA extractionUltracentrifugation

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Mycology

Background:

  • Fungal RNA extraction from lignocellulose is challenging due to complex biomass.
  • Existing methods often yield low-quality RNA or require extensive purification.
  • Contaminants from plant material and humic acids interfere with downstream applications.

Purpose of the Study:

  • To develop an efficient and reproducible method for fungal RNA extraction.
  • To obtain high-purity RNA suitable for sensitive downstream analyses.
  • To address challenges posed by lignocellulose-rich samples and humic acids.

Main Methods:

  • Snap-freezing fungal cells followed by disruption in chaotropic guanidinium thiocyanate buffer.
  • RNA isolation using cesium chloride (CsCl) gradient ultracentrifugation.
  • Adjusting extraction buffer pH to accommodate humic acid-rich samples.

Main Results:

  • High yield and quality of fungal RNA were achieved.
  • Effective removal of endogenous contaminants (RNases) and plant-derived substances (aromatic compounds).
  • No additional DNase treatment was required post-extraction.

Conclusions:

  • The described method provides pure fungal RNA from complex matrices.
  • The extracted RNA is highly suitable for gene expression analyses, including RNA sequencing.
  • This technique offers a reliable solution for fungal RNA isolation in diverse biological samples.