Optimization, kinetics and antioxidant activity of exopolysaccharide produced from rhizosphere isolate, Pseudomonas fluorescens CrN6

Sirajunnisa, Abdul Razack; Vijayagopal, V.; Sivaprakash, Baskaran; Viruthagiri, T.; Surendhiran, Duraiarasan

doi:10.1016/j.carbpol.2015.08.080

Cited by 42 publications

(23 citation statements)

References 29 publications

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“…4 Dehydration temperature. 5 Crystallinity index by X-ray diffraction. 6 Crystallinity index by differential scanning calorimetry.…”

Section: Microscopymentioning

confidence: 99%

“…EPS mainly consists of polysaccharides, proteins, extracellular DNA, and (phospho) lipids . EPS are observed in bacteria and cyanobacteria and marine microorganisms …”

Section: Introductionmentioning

confidence: 99%

“…The unique biophysicochemical properties of bacterial EPS make it widely useful in the food industry as viscosifying, stabilizing, and emulsifying agents . In addition, EPS could be used as encapsulating materials, heavy metal removing agents, drug delivery agents, ion exchange resins, a natural immunomodulator, and antioxidant …”

Section: Introductionmentioning

confidence: 99%

“…[3] EPS mainly consists of polysaccharides, proteins, extracellular DNA, and (phospho) lipids. [4] EPS are observed in bacteria and cyanobacteria [5] and marine microorganisms. [6] Extracellular polymeric substances origin is very complex, and their components and content heavily depend on many factors, such as bacterial type, cultivation time, substrate, and growth state (attached or suspended).…”

Section: Introductionmentioning

confidence: 99%

“…[3,12] In addition, EPS could be used as encapsulating materials, heavy metal removing agents, drug delivery agents, ion exchange resins, a natural immunomodulator, and antioxidant. [5,13] In this study, EPS by C. necator IPT 027 cultivated with glucose (EPS 1) and CG originated from the processing of biodiesel from castor beans oil (EPS 2) were extracted and studied with respect to its chemical and physical analysis. Some important properties, such as thermostability, rheology, morphology, and crystallinity, were investigated for their future industrial applications.…”

Section: Introductionmentioning

confidence: 99%

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Novel extracellular polymeric substances produced by Cupriavidus necator IPT 027 grown on glucose and crude glycerol originated from biodiesel

Ribeiro

Campos

Druzian

2016

Polymers for Advanced Techs

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The aim of this study was to evaluate the production and properties of novel extracellular polymeric substances (EPS) from glucose (EPS 1) and crude glycerol (CG) from castor beans oil (EPS 2). Cupriavidus necator IPT 027 cultivated with glucose and CG (35 °C, 150 rpm, 72 hr, pH 7, shaker) produced approximately 1.60 ± 0.01 and 2.83 ± 0.02 g l−1 EPS, respectively, with high‐molecular weight (3.89 × 105 and 1.89 × 107 Da) and constituted of different functional groups such as uronic acid, monosaccharides (glucose, mannose, arabinose, and fucose) and primary amine group. The composition of the fermentable substrate influenced the melting temperature (221.11 and 230.18 °C), crystallinity (34.36% and 37.11%), degradation temperature (255.06 and 296.62 °C) and morphology. EPS showed pseudoplastic non‐Newtonian fluid behavior in the aqueous solutions, presenting potential applicability biotechnological and industrial mainly in food industry as emulsifiers and biosurfactants. This is the first study on the production and characterization of EPS obtained by C. necator IPT 027 in culture with glucose and CG. Copyright © 2016 John Wiley & Sons, Ltd.

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“…4 Dehydration temperature. 5 Crystallinity index by X-ray diffraction. 6 Crystallinity index by differential scanning calorimetry.…”

Section: Microscopymentioning

confidence: 99%

“…EPS mainly consists of polysaccharides, proteins, extracellular DNA, and (phospho) lipids . EPS are observed in bacteria and cyanobacteria and marine microorganisms …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Novel extracellular polymeric substances produced by Cupriavidus necator IPT 027 grown on glucose and crude glycerol originated from biodiesel

Ribeiro

Campos

Druzian

2016

Polymers for Advanced Techs

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Cultivation of Chlorella mutant in cellulosic ethanol wastewater using a static mixing airlift photo‐bioreactor for simultaneous wastewater treatment

Chang

Zhang

et al. 2017

Env Prog and Sustain Energy

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Cellulosic ethanol wastewater (CEW) is a mixture of wastewater from different procedures of cellulosic ethanol production. It cannot be completely purified with a secondary treatment method, such as anaerobic digestion. Microalgae cultivation is an effective way that can achieve advanced wastewater remediation and biomass production simultaneously. In this study, a static mixing airlift photo‐bioreactor (PBR) was designed for the cultivation of a Chlorella vulgaris mutant (named as Chlorella vulgaris CEW‐1) that was induced by ultraviolet (UV) mutagenesis. The microalgae exhibited sufficient robustness to undiluted CEW and its growth process in CEW under different conditions was investigated. The maximum biomass productivity in the static mixing airlift PBR can reach up to 1.98 g/L. The chemical oxygen demands removal rate (CODrr), total ammonia nitrogen removal rate (TANrr) and total phosphorus removal rate (TPrr) of the CEW were 54.8%, 97.6%, and 84.2%, respectively. Moreover, the kinetics of cell growth and substrate consumption of CEW were developed with logistic and modified Luedeking–Piret models. The superior efficiency of the static mixing PBR in microalgae cultivation and CEW treatment was further validated and compared with the other two PBRs. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1274–1281, 2017

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Coaggregative interactions between rhizobacteria are promoted by exopolysaccharides from Sinorhizobium meliloti

et al. 2023

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Bacterial surface components and extracellular compounds such as exopolysaccharides (EPSs) are crucial for interactions between cells, tolerance to different types of stress, and host colonization. Sinorhizobium meliloti produces two EPSs: Succinoglycan (EPS I), which is involved in the establishment of symbiosis with Medicago sativa, and galactoglucan (EPS II), associated with biofilm formation and the promotion of aggregation. Here, we aimed to assess their role in aggregative interactions between cells of the same strain of a given species (auto‐aggregation), and between genetically different strains of the same or different species (intra‐ or intergeneric coaggregation). To do this, we used S. meliloti mutants which are defective in the production of EPS I, EPS II, or both. Macroscopic and microscopic coaggregation tests were performed with combinations or pairs of different bacterial strains. The EPS II‐producing strains were more capable of coaggregation than those that cannot produce EPS II. This was true both for coaggregations between different S. meliloti strains, and between S. meliloti and other common rhizobacteria of agricultural relevance, such as Pseudomonas fluorescens and Azospirillum brasilense. The exogenous addition of EPS II strongly promoted coaggregation, thus confirming the polymer's importance for this phenotype. EPS II may therefore be a key factor in events of physiological significance for environmental survival, such as aggregative interactions and biofilm development. Furthermore, it might be a connecting molecule with relevant properties at an ecological, biotechnological, and agricultural level.

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Optimization, kinetics and antioxidant activity of exopolysaccharide produced from rhizosphere isolate, Pseudomonas fluorescens CrN6

Cited by 42 publications

References 29 publications

Novel extracellular polymeric substances produced by Cupriavidus necator IPT 027 grown on glucose and crude glycerol originated from biodiesel

Novel extracellular polymeric substances produced by Cupriavidus necator IPT 027 grown on glucose and crude glycerol originated from biodiesel

Cultivation of Chlorella mutant in cellulosic ethanol wastewater using a static mixing airlift photo‐bioreactor for simultaneous wastewater treatment

Coaggregative interactions between rhizobacteria are promoted by exopolysaccharides from Sinorhizobium meliloti

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