scholarly journals Mixed colonies of Aspergillus niger and Aspergillus oryzae cooperatively degrading wheat bran

2017 ◽  
Vol 102 ◽  
pp. 31-37 ◽  
Author(s):  
I. Benoit-Gelber ◽  
T. Gruntjes ◽  
A. Vinck ◽  
J.G. van Veluw ◽  
H.A.B. Wösten ◽  
...  
Keyword(s):  
Aspergillus Niger ◽  
Aspergillus Oryzae ◽  
Wheat Bran

scholarly journals Influence of medium composition and pH on the production of polygalacturonases by Aspergillus oryzae

2004 ◽  
Vol 47 (5) ◽  
pp. 693-702 ◽  
Author(s):  
Eloane Malvessi ◽  
Mauricio Moura da Silveira
Keyword(s):  
Liquid Medium ◽  
Aspergillus Oryzae ◽  
Wheat Bran ◽  
Medium Composition ◽  
Citrus Fruits ◽  
A Value ◽  
Initial Ph ◽  
Normal Increase

A liquid medium containing wheat bran, salts and a source of inducer (pectin) was found to be suitable for the production of exo- and endo-polygalacturonases by Aspergillus oryzae CCT3940. Induction of polygalacturonases by purified pectin was significantly higher than when rinds of citrus fruits were used as inducer. A. oryzae growth was favoured by pH close to 4, although a drop of pH to around 3 was needed for enzymes production. Afterwards, decreasing activities were observed with the normal increase in pH to near neutrality. The highest activities were achieved with an initial pH of 4 and controlled when it decreased to a value slightly below 3 (159 units endo-PG.mL-1 at 83 h and 45 units exo-PG.mL-1 at 64 h), being the loss in polygalacturonases activities strongly reduced at this condition. The best values of pH and temperature for the action of exo-PG (4.5/57ºC) and endo-PG (4.3/40ºC) were assessed.

Further evidence on differentiation of Aspergillus sojae from Aspergillus oryzae by electrophoretic patterns of cellulase, pectin-lyase, and acid proteinase

1974 ◽  
Vol 20 (3) ◽  
pp. 413-416 ◽  
Author(s):  
S. Nasuno
Keyword(s):  
Aspergillus Oryzae ◽  
Wheat Bran ◽  
Pectin Lyase ◽  
Acid Proteinase ◽  
Solid Culture ◽  
Aspergillus Sojae ◽  
Electrophoretic Patterns ◽  
Cultural Conditions ◽  
Electrophoretic Mobilities ◽  
Species Specific

Cellulase (β-1,4-glucan-4-glucanohydrolase, EC. 3.2.1.4), pectin-lyase (EC. 4.2.2.3), and acid proteinase (aspergillopeptidase A) (EC. 3.4.4.17) extracted from wheat bran solid culture of 23 strains of Aspergillus oryzae and 21 strains of Aspergillus sojae showed species-specific patterns on electrophoresis in polyacrylamide gels. The electrophoretic patterns of the cellulase were independent of age or cultural conditions. The pectin-lyase patterns were also independent of culture age except early phase of growth. The species-specific patterns were clear at the stage of the maximum production of acid proteinase. With the exception of one strain, no variation of the electrophoretic mobilities of these key enzymes were observed between the strains of the same species. The results provide further evidence to support the establishment of A. sojae as a species distinct from A. oryzae and the use of the electrophoretic zymograms as a taxonomic aid.

Exoglucanase production by Aspergillus niger grown on wheat bran

2012 ◽  
Vol 63 (3) ◽  
pp. 871-877 ◽  
Author(s):  
Muniramanna Gari Subhosh Chandra ◽  
Bontha Rajasekhar Reddy
Keyword(s):  
Aspergillus Niger ◽  
Wheat Bran

Biosynthesis of Amyloglucosidase by Aspergillus niger Using Wheat Bran as Substrate

2002 ◽  
Vol 5 (9) ◽  
pp. 962-964
Author(s):  
Ikram-ul-Haq . ◽  
H. Ashraf ◽  
S. Omar ◽  
M.A. Qadeer .
Keyword(s):  
Aspergillus Niger ◽  
Wheat Bran
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