The influence of environmental conditions on polysaccharide formation by Ganoderma lucidum in submerged cultures

Yang, Fan-Chiang; Liau, C.-B.

doi:10.1016/s0032-9592(98)00023-5

Cited by 145 publications

(79 citation statements)

References 3 publications

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“…Similar results were obtained by Yang and Liau (1998) where higher agitation and aeration appeared to be favorable for the formation of polysaccharide by Ganoderma lucidum. Transport of monosaccharides outside the cell involves coupling to C-55 isoprenoid alcohol phosphate.…”

Section: Oxygen and Aeration Ratesupporting

confidence: 83%

Bacterial exopolysaccharides – a perception

Kumar

Mody

Jha

2007

J. Basic Microbiol.

484

139

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Microbial polysaccharides are multifunctional and can be divided into intracellular polysaccharides, structural polysaccharides and extracellular polysaccharides or exopolysaccharides (EPS). Extracellular polymeric substances (EPS), produced by both prokaryotes (eubacteria and archaebacteria) and eukaryotes (phytoplankton, fungi, and algae), have been of topical research interest. Newer approaches are carried out today to replace the traditionally used plant gums by their bacterial counterparts. The bacterial exopolysaccharides represent a wide range of chemical structures, but have not yet acquired appreciable significance. Chemically, EPS are rich in high molecular weight polysaccharides (10 to 30 kDa) and have heteropolymeric composition. They have new-fangled applications due to the unique properties they possess. Owing to this, exopolysaccharides have found multifarious applications in the food, pharmaceutical and other industries. Hence, the present article converges on bacterial exopolysaccharides.

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Section: Oxygen and Aeration Ratesupporting

confidence: 83%

Bacterial exopolysaccharides – a perception

Kumar

Mody

Jha

2007

J. Basic Microbiol.

484

139

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“…The mycelial growth, exopolysaccharide (EPS) production might vary with medium compositions and environmental conditions [12][13][14][15][16][17]. Thus, the investigation of batch cultivation conditions is a shortcut for utilizing A. luteovirens Sacc to improve EPS production.…”

Section: Introductionmentioning

confidence: 99%

Effect of submerged culture conditions on exopolysaccharides production by Armillaria luteo-virens Sacc QH and kinetic modeling

Chen

et al. 2010

Bioprocess Biosyst Eng

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This work aimed to develop the submerged cultivation conditions for improved exopolysaccharides (EPS) production by Armillaria luteo-virens Sacc. The effects of culture temperature, aeration rate, inoculum level, initial pH, and additives on EPS formation and mycelial growth are investigated. The aeration rate, initial pH, and inoculum level significantly affected EPS production under the submerged cultivation. The developed conditions were as follows: cultivation temperature 23 °C, initial pH 5.0, aeration rate 0.5 vvm, 0.5% Tween 80, inoculum level 5% (v/v), and shaking speed 120 r/min. Under the developed conditions, the highest EPS production was 13.01 g/L at 5 days culture time. EPS production was examined in a 5 L bioreactor, and an unstructured kinetic model for EPS formation was well developed. The verified investigations in the large-scale cultivation system showed that the developed models are able to predict the submerged cultivation process of EPS formation. Current results revealed that the submerged cultivation conditions can be utilized to control EPS production, and the unstructured models developed are suitable for explaining EPS production by A. luteo-virens Sacc QH in a large-scale cultivation bioreactor.

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“…10). The agitation speed has greatly affected the production rate and maximum concentration of polysaccharides, for which the optimal rotation speed has been reported at 150 rpm for flask cultures (Yang and Liau, 1998;Chun et al, 2006). The polysaccharide production declined sharply, indicating higher rotation speed may inhibit the release of polysaccharide.…”

Section: Effect Of Agitation On Exopolysaccharide Productionmentioning

confidence: 99%