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Correlation between the production of exopolysaccharides and oxalic acid secretion by Ganoderma applanatum and Tyromyces palustris
- Source :
- World Journal of Microbiology & Biotechnology
- Publication Year :
- 2014
- Publisher :
- Springer Science and Business Media LLC, 2014.
-
Abstract
- The secretion of exopolysaccharides and oxalic acid in cultures of a white rot Ganoderma applanatum strain and a brown rot Tyromyces palustris strain were tested in terms of culture time, pH range, and temperature. The high yield of exopolysaccharides (EPS) required a moderate temperature of 28 °C for G. applanatum and 20 °C for T. palustris. G. applanatum and T. palustris accumulated more EPS when the concentration of the carbon source (maltose for G. applanatum and fructose for T. palustris) was 30 g/L. The results indicate that the production of oxalic acid by G. applanatum is correlated with the initial pH value of the culture medium and the concentration of oxalic acid increased to 1.66 ± 0.2 mM at the initial pH of 6.5 during the fungal growth. During the growth of T. palustris, the reduction of the initial pH value of the growing medium lowered the oxalic acid concentration from 7.7 ± 0.6 mM at pH 6.0 to 1.99 ± 0.2 mM at pH 3.5. T. palustris accumulated considerably more oxalic acid than G. applanatum and its presence did not affect significantly the production of exopolysaccharides. We also observed that the maximum amounts of exopolysaccharides secreted during cultivation of G. applanatum and T. palustris were 45.8 ± 1.2 and 19.1 ± 1.2 g/L, respectively.
- Subjects :
- Exopolysaccharides
Time Factors
Physiology
Ganoderma
Oxalic acid
Biology
Ganoderma applanatum
Polysaccharide
Applied Microbiology and Biotechnology
chemistry.chemical_compound
Polysaccharides
Tyromyces
Food science
Oxalic acid secretion
chemistry.chemical_classification
Original Paper
Oxalic Acid
Temperature
Fructose
General Medicine
Maltose
Hydrogen-Ion Concentration
biology.organism_classification
Carbon
Culture Media
chemistry
Biochemistry
Tyromyces palustris
Coriolaceae
Biotechnology
Subjects
Details
- ISSN :
- 15730972 and 09593993
- Volume :
- 30
- Database :
- OpenAIRE
- Journal :
- World Journal of Microbiology and Biotechnology
- Accession number :
- edsair.doi.dedup.....4d130eee5cf16091a20809e584987185