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Related Experiment Video

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Network Component Analysis Can Identify Potential Axenisation Strategies Circumventing Antibiotic-Use for

A Iyer1,2, M Monissen3, Q Teo1,2

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Summary

Achieving axenic microalgae cultures without antibiotics is crucial. Network analysis suggests filtration, washing, and micropicking for diatoms, and micropicking, subculturing, and flow cytometry for dinoflagellates are promising antibiotic-free methods.

Keywords:
axenisationeukaryotemicroalgaephototrophssingle culture

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Area of Science:

  • Microbiology
  • Phycology
  • Biotechnology

Background:

  • Axenisation, or creating pure microalgal cultures, traditionally relies on antibiotics.
  • Antibiotic use can lead to inconsistent results and antibiotic-resistant microbes.
  • A need exists for alternative, reliable axenisation workflows.

Purpose of the Study:

  • To systematically analyze existing literature on microalgal axenisation.
  • To identify and propose antibiotic-free axenisation workflows for major microalgal groups.
  • To highlight methods for confirming culture purity.

Main Methods:

  • Systematic literature recovery from scholarly databases.
  • Network component analysis to identify method clusters for axenisation.
  • Review of methods for confirming axenic culture purity (microscopy, cell counting, sequencing).

Main Results:

  • Identified potential antibiotic-free workflows: filtration ↔ washing ↔ micropicking for diatoms.
  • Identified potential antibiotic-free workflows: micropicking ↔ subculturing ↔ flow cytometry for dinoflagellates.
  • No definitive workflow emerged for green algae, though some methods were noted.

Conclusions:

  • Antibiotic-free axenisation workflows show promise for diatoms and dinoflagellates.
  • Microscopy, cell counting, and sequencing are vital for confirming axenic purity.
  • Further research is needed to develop and validate workflows for other microalgal groups.