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Ten Ostreobium (Ulvophyceae) strains from Great Barrier Reef corals as a resource for algal endolith biology and genomics

Marisa M. Pasella, Ming-Fen Eileen Lee, Vanessa R. Marcelino, Anusuya Willis, Heroen Verbruggen
doi: https://doi.org/10.1101/2021.08.16.453452
Marisa M. Pasella
1School of BioSciences, University of Melbourne, Victoria, Australia
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  • For correspondence: m.pasella91@gmail.com
Ming-Fen Eileen Lee
1School of BioSciences, University of Melbourne, Victoria, Australia
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Vanessa R. Marcelino
2Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, VIC, Australia
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Anusuya Willis
3Australian National Algae Culture Collection ANACC, CSIRO National Collections and Marine Infrastructure, Hobart, TAS, Australia
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Heroen Verbruggen
1School of BioSciences, University of Melbourne, Victoria, Australia
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ABSTRACT

Ostreobium is a genus of siphonous green algae that lives as an endolith in carbonate substrates under extremely limited light conditions and has recently been gaining attention due to its roles in reef carbonate budgets and its association with reef corals. Knowledge about this genus remains fairly limited due to the scarcity of strains available for physiological studies. Here, we report on 10 strains of Ostreobium isolated from coral skeletons from the Great Barrier Reef. Phenotypic diversity showed differences in the gross morphology and in few structures. Phylogenetic analyses of the tufA and rbcL put the strains in the context of the lineages identified previously through environmental sequencing. The chloroplast genomes of our strains are all around 80k bp in length and show that genome structure is highly conserved, with only a few insertions (some containing putative protein-coding genes) differing between the strains. The addition of these strains from the Great Barrier Reef to our toolkit will help develop Ostreobium as a model species for endolithic growth, low-light photosynthesis and coral-algal associations.

Competing Interest Statement

The authors have declared no competing interest.

Footnotes

  • https://doi.org/10.6084/m9.figshare.15022026.v1

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted August 17, 2021.
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Ten Ostreobium (Ulvophyceae) strains from Great Barrier Reef corals as a resource for algal endolith biology and genomics
Marisa M. Pasella, Ming-Fen Eileen Lee, Vanessa R. Marcelino, Anusuya Willis, Heroen Verbruggen
bioRxiv 2021.08.16.453452; doi: https://doi.org/10.1101/2021.08.16.453452
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Ten Ostreobium (Ulvophyceae) strains from Great Barrier Reef corals as a resource for algal endolith biology and genomics
Marisa M. Pasella, Ming-Fen Eileen Lee, Vanessa R. Marcelino, Anusuya Willis, Heroen Verbruggen
bioRxiv 2021.08.16.453452; doi: https://doi.org/10.1101/2021.08.16.453452

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