Effect of different carbon sources on the growth and enzyme production of a toxigenic and a non-toxigenic strain of Aspergillus flavus .

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  • Additional Information
    • Source:
      Publisher: Taylor & Francis Country of Publication: England NLM ID: 9607037 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1532-2297 (Electronic) Linking ISSN: 10826068 NLM ISO Abbreviation: Prep Biochem Biotechnol Subsets: MEDLINE
    • Publication Information:
      Publication: <2005-> : Abingdon, Oxford : Taylor & Francis
      Original Publication: New York, NY : Marcel Dekker, c1996-
    • Subject Terms:
      Aspergillus flavus*/enzymology ; Aspergillus flavus*/growth & development; Endo-1,4-beta Xylanases/*biosynthesis ; Fungal Proteins/*biosynthesis ; Pectins/*metabolism ; Polygalacturonase/*biosynthesis ; Xylans/*metabolism; Carbon/metabolism ; Species Specificity
    • Abstract:
      Two strains of A. flavus one toxigenic (CECT 2687) and the other non-toxigenic (NRRL 6541) were studied for their genomic potential, growth capacity, and the production of enzymes on simple sugars, polysaccharides, and complex substrates under solid-state fermentation (SSF). According to the genome analysis, this fungus has many genes to degrade different types of polysaccharides and therefore it would be able to grow on different substrates. Both strains grow in all the carbon sources, but visibly CECT2687 grows slower than NRRL6541. However, we propose the growth index (GI) to establish a dry weight-diameter relationship as a more reliable measure that truly shows the growth preferences of the fungus. Considering this, the NRRL6541 shows less growth in 11 of the 16 evaluated carbon sources than CECT2687. Complex substrates were the best carbon source for the growth of both strains. Corncob (CC) induced the production of xylanases, pectinases, and almost all the accessory enzymes evaluated (except for α-xylosidase) this could make it an agricultural waste of interest to produce hemicellulolytic enzymes. Both strains produce a great variety of xylanases and pectinases (pathogenicity factors) making A. flavus a good potential candidate for the degradation of polysaccharides with a high content of xylan and pectin.
    • Contributed Indexing:
      Keywords: Aspergillus flavus; Growth Index (GI); carbon utilization; enzyme production; fungal growth; plant biomass degradation; solid-state fermentation
    • Accession Number:
      0 (Fungal Proteins)
      0 (Xylans)
      7440-44-0 (Carbon)
      89NA02M4RX (Pectins)
      EC 3.2.1.15 (Polygalacturonase)
      EC 3.2.1.8 (Endo-1,4-beta Xylanases)
    • Publication Date:
      Date Created: 20201221 Date Completed: 20210930 Latest Revision: 20210930
    • Publication Date:
      20231215
    • Accession Number:
      10.1080/10826068.2020.1858426
    • Accession Number:
      33347339