Screening of marine microalgae: Investigation of new exopolysaccharide producers

•166 microalgae and Cyanobacteria species have been screened to identify exopolysaccharides producers.•8 new genera of microalgae were highlighted as exopolysaccharide producer.•Specific exopolysaccharides compositions were distinguished between phyla by metanalysis. Biopolymers, such as exopolysacc...

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Bibliographic Details
Published in:Algal research (Amsterdam) 2019-12, Vol.44, p.101711, Article 101711
Main Authors: Gaignard, C., Laroche, C., Pierre, G., Dubessay, P., Delattre, C., Gardarin, C., Gourvil, P., Probert, I., Dubuffet, A., Michaud, P.
Format: Article
Language:English
Subjects:
Exopolysaccharides
Life Sciences
Microalgae
Microbiology and Parasitology
Phylogeny
Polysaccharides
Protistology
Screening
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Summary:•166 microalgae and Cyanobacteria species have been screened to identify exopolysaccharides producers.•8 new genera of microalgae were highlighted as exopolysaccharide producer.•Specific exopolysaccharides compositions were distinguished between phyla by metanalysis. Biopolymers, such as exopolysaccharides are widely exploited by industry as hydrocolloids (gelling, thickening agents) and biological agents (anti-inflammatory, anti-parasitic, antioxidant, etc.). In this study, 166 marine microalgae and cyanobacteria species have been screened in order to identify strains producing original exopolysaccharides. This screening allowed the highlighting of 45 positive strains. In a second time, the monosaccharide compositions from 20 EPS of them were determined by GC/MS and HPAEC-PAD. The results led to a discovery of 8 new genera of microalgae producing EPS, including polymers with a very original composition like richness in GlcA. Finally, a phylogenic tree has been contructed in order to assess the link between the phylogeny of microalgae and the global composition of their exopolymers, based on data obtained in this study and from the literature.
ISSN:2211-9264
2211-9264
DOI:10.1016/j.algal.2019.101711