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Published January 1, 2022 | Version v1
Journal article Open

What Was Old Is New Again: The Pennate Diatom Haslea ostrearia (Gaillon) Simonsen in the Multi-Omic Age

Creators

  • 1. Hellen Ctr Marine Res HCMR, Inst Marine Biol Biotechnol & Aquaculture, Iraklion 71003, Greece
  • 2. Le Mans Univ, Lab Biol Organismes Stress Sante Environm BiOSSE, Ave Olivier Messiaen, F-72085 Le Mans, France
  • 3. United Arab Emirates Univ UAEU, Dept Biol, POB 15551, Al Ain, U Arab Emirates
  • 4. Univ Szczecin, Inst Marine & Environm Sci, Mickiewicza 16, PL-70383 Szczecin, Poland
  • 5. Nat Reserve Russian Acad Sci, Karadag Sci Stn, Kurortnoe 98188, Feodosiya, Russia
  • 6. Natl & Kapodistrian Univ Athens, Dept Pharm, Sect Pharmacognosy & Chem Nat Prod, Athens 15771, Greece

Description

The marine pennate diatom Haslea ostrearia has long been known for its characteristic blue pigment marennine, which is responsible for the greening of invertebrate gills, a natural phenomenon of great importance for the oyster industry. For two centuries, this taxon was considered unique; however, the recent description of a new blue Haslea species revealed unsuspected biodiversity. Marennine-like pigments are natural blue dyes that display various biological activities-e.g., antibacterial, antioxidant and antiproliferative-with a great potential for applications in the food, feed, cosmetic and health industries. Regarding fundamental prospects, researchers use model organisms as standards to study cellular and physiological processes in other organisms, and there is a growing and crucial need for more, new and unconventional model organisms to better correspond to the diversity of the tree of life. The present work, thus, advocates for establishing H. ostrearia as a new model organism by presenting its pros and cons-i.e., the interesting aspects of this peculiar diatom (representative of benthic-epiphytic phytoplankton, with original behavior and chemodiversity, controlled sexual reproduction, fundamental and applied-oriented importance, reference genome, and transcriptome will soon be available); it will also present the difficulties encountered before this becomes a reality as it is for other diatom models (the genetics of the species in its infancy, the transformation feasibility to be explored, the routine methods needed to cryopreserve strains of interest).

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