Estimation of growth and exopolysaccharide production by two soil cyanobacteria, <i>Scytonema tolypothrichoides</i> and <i>Tolypothrix bouteillei</i> as determined by cultivation in irradiance and temperature crossed gradients

Kvíderová, Jana; Kumar, Dhanesh; Lukavský, Jaromír; Kaštánek, Petr; Adhikary, S. P.

doi:10.1002/elsc.201800082

Cited by 21 publications

(12 citation statements)

References 58 publications

(82 reference statements)

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“…In addition, EPS and biomass production phases were shown to be disassociated [70]. Other authors have claimed the same disassociation of the kinetics [76,77,79].…”

Section: Modes Of Cultivation and Pbr Designmentioning

confidence: 71%

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Exopolysaccharides from Cyanobacteria: Strategies for Bioprocess Development

et al. 2020

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Cyanobacteria have the potential to become an industrially sustainable source of functional biopolymers. Their exopolysaccharides (EPS) harbor chemical complexity, which predicts bioactive potential. Although some are reported to excrete conspicuous amounts of polysaccharides, others are still to be discovered. The production of this strain-specific trait can promote carbon neutrality while its intrinsic location can potentially reduce downstream processing costs. To develop an EPS cyanobacterial bioprocess (Cyano-EPS) three steps were explored: the selection of the cyanobacterial host; optimization of production parameters; downstream processing. Studying the production parameters allow us to understand and optimize their response in terms of growth and EPS production though many times it was found divergent. Although the extraction of EPS can be achieved with a certain degree of simplicity, the purification and isolation steps demand experience. In this review, we gathered relevant research on EPS with a focus on bioprocess development. Challenges and strategies to overcome possible drawbacks are highlighted.

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“…In addition, EPS and biomass production phases were shown to be disassociated [70]. Other authors have claimed the same disassociation of the kinetics [76,77,79].…”

Section: Modes Of Cultivation and Pbr Designmentioning

confidence: 71%

“…These two strains from the same microhabitat had different light and temperature optima, supporting, even more, the strain specificity on Cyano-EPS control. Moreover, the temperature was shown to be the most significant parameter [77].…”

Section: Process Conditionsmentioning

confidence: 99%

Exopolysaccharides from Cyanobacteria: Strategies for Bioprocess Development

et al. 2020

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“… Román et al (2018) demonstrate that soil covered by Tolypothrix distorta will have lower albedo, higher chlorophyll a content, and greater total organic carbon and total nitrogen. Moreover, the structured sheath layer around Tolypothrix trichomes has a positive effect in soil stabilization ( Kvíderová et al, 2019 ). Oculatella , a narrow filamentous cyanobacteria, is considered essential for initial biocrust formation ( Roncero-Ramos et al, 2019 ), and can improve soil structure and function and secrete filaments and polymers that help bind soil.…”

Section: Discussionmentioning

confidence: 99%

Biocrust Amendments to Topsoils Facilitate Biocrust Restoration in a Post-mining Arid Environment

Schultz

Sluiter

Allen³

et al. 2022

Front. Microbiol.

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Soil cryptogamic biocrusts provide many ecological functions in arid zone ecosystems, though their natural reestablishment in disturbed areas is slow. Accelerating reestablishment of biocrusts may facilitate the establishment of vascular plant communities within the timeframes of restoration targets (typically 5–15 years). One technique is to inoculate the soil surface using slurries of biocrust material harvested from another site. However, this is destructive to donor sites, and hence the potential to dilute slurries will govern the feasibility of this practice at large spatial scales. We conducted a replicated experiment on a disturbed mine site to test the individual and combined effects of two strategies for accelerating soil cryptogamic biocrust reestablishment: (1) slurry inoculation using biocrust material harvested from native vegetation; and (2) the use of psyllium husk powder as a source of mucilage to bind the soil surface, and to potentially provide a more cohesive substrate for biocrust development. The experiment comprised 90 experimental plots across six treatments, including different dilutions of the biocrust slurries and treatments with and without psyllium. Over 20 months, the reestablishing crust was dominated by cyanobacteria (including Tolypothrix distorta and Oculatella atacamensis), and these established more rapidly in the inoculated treatments than in the control treatments. The inoculated treatments also maintained this cover of cyanobacteria better through prolonged adverse conditions. The dilute biocrust slurry, at 1:100 of the biocrust in the remnant vegetation, performed as well as the 1:10 slurry, suggesting that strong dilution of biocrust slurry may improve the feasibility of using this technique at larger spatial scales. Psyllium husk powder did not improve biocrust development but helped to maintain a soil physical crust through hot, dry, and windy conditions, and so the potential longer-term advantages of psyllium need to be tested.

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“…The optimum growth range for S. tolypothrichoides and T. bouteillei was achieved at 27–34 °C and 22–32 °C, respectively. The temperature required for maximum EPS production for S. tolypothrichoides and T. bouteillei was nearly identical 28–34 °C and 27–34 °C, respectively [ 68 ].…”

Section: Use Of Desert Cyanobacteria For Soil Remediationmentioning

confidence: 99%

Metabolites Facilitating Adaptation of Desert Cyanobacteria to Extremely Arid Environments

Dabravolski

Isayenkov

2022

Plants

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Desert is one of the harshest environments on the planet, characterized by exposure to daily fluctuations of extreme conditions (such as high temperature, low nitrogen, low water, high salt, etc.). However, some cyanobacteria are able to live and flourish in such conditions, form communities, and facilitate survival of other organisms. Therefore, to ensure survival, desert cyanobacteria must develop sophisticated and comprehensive adaptation strategies to enhance their tolerance to multiple simultaneous stresses. In this review, we discuss the metabolic pathways used by desert cyanobacteria to adapt to extreme arid conditions. In particular, we focus on the extracellular polysaccharides and compatible solutes biosynthesis pathways and their evolution and special features. We also discuss the role of desert cyanobacteria in the improvement of soil properties and their ecological and environmental impact on soil communities. Finally, we summarize recent achievements in the application of desert cyanobacteria to prevent soil erosion and desertification.

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Estimation of growth and exopolysaccharide production by two soil cyanobacteria, Scytonema tolypothrichoides and Tolypothrix bouteillei as determined by cultivation in irradiance and temperature crossed gradients

Cited by 21 publications

References 58 publications

Exopolysaccharides from Cyanobacteria: Strategies for Bioprocess Development

Exopolysaccharides from Cyanobacteria: Strategies for Bioprocess Development

Biocrust Amendments to Topsoils Facilitate Biocrust Restoration in a Post-mining Arid Environment

Metabolites Facilitating Adaptation of Desert Cyanobacteria to Extremely Arid Environments

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