These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Aflatoxin formation and the dual phenomenon in Aspergillus flavus Link.
    Author: Clevström G, Ljunggren H.
    Journal: Mycopathologia; 1985 Dec; 92(3):129-39. PubMed ID: 3937056.
    Abstract:
    Trials were performed with three aflatoxin-forming isolates of Aspergillus flavus from formic acid-treated materials containing aflatoxin, one A. flavus strain isolated from mouldy barley kept for two months in an anaerobic jar and one non-toxic A. flavus strain from the culture collection at our Department. The non-toxic strain and one aflatoxin producer were cultured in salts-sugar-asparagine substrate (SLM) for aflatoxin production and in a specially prepared grass substrate (GS). Formic acid and ammonium formate were added to both substrates, and sucrose in a low amount was added to the grass substrate. The aflatoxin-forming isolate segregated on the grass substrate into two different lines, one with high aflatoxin production and one with very low aflatoxin-forming ability, higher growth rate and reduced sporulation, on the SLM substrate. When exposed to sucrose in grass substrate and ammonium formate in SLM, one toxic and one non-toxic strain were provoked to increased aflatoxin formation. The A. flavus isolate from the anaerobic jar also segregated on the grass substrate, and these segregants were more sensitive to a high dose of formic acid. In these A. flavus strains three seems to be a continuous variation between different lines, depending on cultivation conditions. In the two aflatoxin-forming isolates left, such segregation tendencies were not very marked on any substrate.
    [Abstract] [Full Text] [Related] [New Search]