Exopolysaccharides from cyanobacteria and their possible industrial applications

Colica, Giovanni; Philippis, Roberto De

doi:10.1002/9781118402238.ch12

Cited by 11 publications

(7 citation statements)

References 87 publications

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“…Cyanobacteria are able to synthesize polysaccharides by different biosynthetic pathways. They may be complex heteropolymers represented by 2-14 different monosaccharides, methyl sugars, and/or amino sugars [49] like those identified in this extract.…”

Section: Gc-ms Analysismentioning

confidence: 86%

Bioglea as a Source of Bioactive Ingredients: Chemical and Biological Evaluation

et al. 2020

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This study focused on bioglea in thermal material sampled at Saturnia spa (Tuscany, Italy). Bioglea is the term used to define the thermal plankton consisting of biogenic substances that have been investigated little from the chemical and biological points of view. Bioglea is mainly formed of cyanobacteria, particularly from the Oscillatoriales subsection, and it seems to have an important role in the maturation of thermal mud for the development of organic matter. This cyanobacteria-dominated community develops in a large outdoor pool at the spa, where the spring water is collected, over the sediments, with matter floating at the surface. Throughout the year, the cyanobacterial species of bioglea were the same, but their relative abundance changed significantly. For chemical characterization an extractive method and several analytical techniques (HPLC, GC-MS, SPME) were used. We also studied the radical scavenging activity using in vitro tests (DPPH, ORAC, ABTS). We found various groups of compounds: saturated and unsaturated fatty acids, hydroxyl acids, alcohols, phenols, amino acids. Many of the compounds have already been identified in the mud, particularly the lipid component. SPME indicated several hydrocarbons (C11–C17) and long-chain alcohols (C12–C16). The qualitative composition of volatile substances identified in bioglea was very similar to that of the mud previously analysed. These results contribute to our knowledge on thermal photosynthetic community and its possible exploitation.

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Section: Gc-ms Analysismentioning

confidence: 86%

Bioglea as a Source of Bioactive Ingredients: Chemical and Biological Evaluation

et al. 2020

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“…It was shown that the presence of sulphate groups confers antiviral properties to the sulfated exopolysaccharide (TK V3) produced by Arthrospira platensis , which was found to inhibit orthopoxvirus and other enveloped viruses [ 142 ]. Antiviral properties have also been shown for Nostoflan, an EPS produced by the terrestrial cyanobacterium Nostoc flagelliforme [ 143 ], as well as for the EPSs produced by other cyanobacteria [ 144 ].…”

Section: Polysaccharides From Cyanobacteria For Developing New Bioact...mentioning

confidence: 99%

Microalgae-Based Biorefineries: Challenges and Future Trends to Produce Carbohydrate Enriched Biomass, High-Added Value Products and Bioactive Compounds

Olguín

Sánchez-Galván

Arias‐Olguín³

et al. 2022

Biology

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Microalgae have demonstrated a large potential in biotechnology as a source of various macromolecules (proteins, carbohydrates, and lipids) and high-added value products (pigments, poly-unsaturated fatty acids, peptides, exo-polysaccharides, etc.). The production of biomass at a large scale becomes more economically feasible when it is part of a biorefinery designed within the circular economy concept. Thus, the aim of this critical review is to highlight and discuss challenges and future trends related to the multi-product microalgae-based biorefineries, including both phototrophic and mixotrophic cultures treating wastewater and the recovery of biomass as a source of valuable macromolecules and high-added and low-value products (biofertilizers and biostimulants). The therapeutic properties of some microalgae-bioactive compounds are also discussed. Novel trends such as the screening of species for antimicrobial compounds, the production of bioplastics using wastewater, the circular economy strategy, and the need for more Life Cycle Assessment studies (LCA) are suggested as some of the future research lines.

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“…In addition, a significant difference in water-retaining capability after treating soil crust samples for EPM removal was detected. Following a significant water introduction, the swelling of the EPSs is reported to cause soil pore clogging, possibly leading to water run-off [ 126 ].…”

Section: Ecological Roles Of Microbial Eps In the Marine Environmentmentioning

confidence: 99%

Potential functions and applications of diverse microbial exopolysaccharides in marine environments

Ibrahim

Elhassayeb

El-Sayed

2022

Journal of Genetic Engineering and Biotechnology

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Exopolysaccharides (EPSs) from microorganisms are essential harmless natural biopolymers used in applications including medications, nutraceuticals and functional foods, cosmetics, and insecticides. Several microbes can synthesize and excrete EPSs with chemical properties and structures that make them suitable for several important applications. Microbes secrete EPSs outside their cell walls, as slime or as a “jelly” into the extracellular medium. These EPS-producing microbes are ubiquitous and can be isolated from aquatic and terrestrial environments, such as freshwater, marine water, wastewater, and soils. They have also been isolated from extreme niches like hot springs, cold waters, halophilic environments, and salt marshes. Recently, microbial EPSs have attracted interest for their applications such as environmental bio-flocculants because they are degradable and nontoxic. However, further efforts are required for the cost-effective and industrial-scale commercial production of microbial EPSs. This review focuses on the exopolysaccharides obtained from several extremophilic microorganisms, their synthesis, and manufacturing optimization for better cost and productivity. We also explored their role and applications in interactions between several organisms.

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Exopolysaccharides from cyanobacteria and their possible industrial applications

Cited by 11 publications

References 87 publications

Bioglea as a Source of Bioactive Ingredients: Chemical and Biological Evaluation

Bioglea as a Source of Bioactive Ingredients: Chemical and Biological Evaluation

Microalgae-Based Biorefineries: Challenges and Future Trends to Produce Carbohydrate Enriched Biomass, High-Added Value Products and Bioactive Compounds

Potential functions and applications of diverse microbial exopolysaccharides in marine environments

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