The nutritional and pharmacological potential of new australian thraustochytrids isolated from mangrove sediments

Thi Linh Nham Tran, Ana F. Miranda, Adarsha Gupta, Munish Puri, Andrew S. Ball, Benu Adhikari, Aidyn Mouradov

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Mangrove sediments represent unique microbial ecosystems that act as a buffer zone, biogeochemically recycling marine waste into nutrient-rich depositions for marine and terrestrial species. Marine unicellular protists, thraustochytrids, colonizing mangrove sediments have received attention due to their ability to produce large amounts of long-chain ω;3-polyunsaturated fatty acids. This paper represents a comprehensive study of two new thraustochytrids for their production of valuable biomolecules in biomass, de-oiled cakes, supernatants, extracellular polysaccharide matrixes, and recovered oil bodies. Extracted lipids (up to 40% of DW) rich in polyunsaturated fatty acids (up to 80% of total fatty acids) were mainly represented by docosahexaenoic acid (75% of polyunsaturated fatty acids). Cells also showed accumulation of squalene (up to 13 mg/g DW) and carotenoids (up to 72 μg/g DW represented by astaxanthin, canthaxanthin, echinenone, and β-carotene). Both strains showed a high concentration of protein in biomass (29% DW) and supernatants (2.7 g/L) as part of extracellular polysaccharide matrixes. Alkalinization of collected biomass represents a new and easy way to recover lipid-rich oil bodies in the form of an aqueous emulsion. The ability to produce added-value molecules makes thraustochytrids an important alternative to microalgae and plants dominating in the food, pharmacological, nutraceutical, and cosmetics industries.

Original languageEnglish
Article number151
Number of pages17
JournalMarine Drugs
Volume18
Issue number3
DOIs
Publication statusPublished - 6 Mar 2020

Bibliographical note

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Keywords

  • Aurantiochytrium
  • Carbohydrates
  • Carotenoids
  • EPS
  • FAME
  • Lipids
  • Oil body
  • Protists
  • Squalene

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