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An optimised method for intact nuclei isolation from diatoms.

Rossella Annunziata1, Cecilia Balestra2, Pina Marotta2

  • 1Stazione Zoologica Anton Dohrn, 80121, Napoli, Italy. rossella.annunziata@szn.it.

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|January 19, 2021
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Summary
This summary is machine-generated.

Researchers developed a new method to isolate intact nuclei from diatoms, overcoming challenges posed by their silica cell walls. This breakthrough aids diatom molecular biology, including genomics and transcriptomics.

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Area of Science:

  • Marine Biology
  • Biotechnology
  • Molecular Biology

Background:

  • Diatoms are abundant marine organisms with significant biodiversity.
  • Their unique silica cell walls pose challenges for molecular biology techniques.
  • Diatom biotech applications are increasing, driving research interest.

Purpose of the Study:

  • To develop a protocol for isolating intact nuclei from diatoms.
  • To overcome limitations in diatom cell lysis for molecular studies.

Main Methods:

  • Treatment with acidified NH4F solution and low-intensity sonication.
  • Separation of nuclei from cell debris using Fluorescence-Activated Cell Sorting (FAC-sorting).
  • Incubation with SYBR Green for nuclei detection.

Main Results:

  • Successfully isolated intact nuclei from three diatom species (Pseudo-nitzschia multistriata, Phaeodactylum tricornutum, Chaetoceros diadema).
  • Microscopy confirmed the integrity of isolated nuclei.
  • DNA electrophoresis showed minimal fragmentation of extracted genomic DNA.

Conclusions:

  • The protocol is flexible and versatile for various diatom species.
  • This method facilitates epigenetic studies and single-nucleus genomics, transcriptomics, and proteomics.
  • The protocol has the potential to accelerate molecular research in diatoms.