A novel cost effective and high-throughput isolation and identification method for marine microalgae

Area of Science:

• Marine biology
• Phycology
• Biotechnology

Background:

• Marine microalgae hold significant ecological and economic importance.
• Comprehensive culture collections are vital for research but hindered by slow isolation and identification methods.
• Current molecular techniques for algal characterization present considerable time constraints.

Purpose of the Study:

• To develop a cost-effective and high-throughput method for isolating and identifying marine microalgal strains.
• To accelerate the establishment of diverse marine microalgal cultures for research and biotechnological applications.

Main Methods:

• Employed strain isolation on plates for increased throughput.
• Utilized direct PCR (dPCR) of phylogenetic marker genes for taxonomic identification.
• Implemented a novel sequencing electropherogram-based screening method for assessing diversity and identity.

Main Results:

• Successfully isolated and identified various unialgal cultures from Arctic Ocean phytoplankton communities.
• Included the isolation of a novel marine Chlorophyceae strain alongside several diatom species.
• Demonstrated a significant increase in throughput for marine microalgal isolation and identification.

Conclusions:

• The developed approach efficiently transitions natural phytoplankton communities to isolated, identified algal strains within weeks.
• This method overcomes limitations of standard molecular characterization and unialgal culture establishment.
• Validated in the Arctic, the approach enhances the study of sensitive phytoplankton.