INVESTIGADORES
NESCI Andrea Veronica
artículos
Título:
Effect of natural maize phytochemicals on Aspergillus section Flavi sclerotia characteristics under different conditions of growth media and wáter potential
Autor/es:
NESCI, A.; ETCHEVERRY, M.
Revista:
Fungal Ecology
Editorial:
Elsevier
Referencias:
Lugar: Exeter (UK) ; Año: 2009 vol. 2 p. 44 - 51
ISSN:
1754-5048
Resumen:
The effects of the natural phytochemicals trans-cinnamic acid (CA) and ferulic acid (FA) at
concentrations of 120 mM (CA) and 125 mM (FA) on sclerotial production by Aspergillus
flavus and Aspergillus parasiticus were evaluated. Studies on sclerotium number and size
were carried out in different growth media and water potentials (MPa). High concentrations
of CA (20 mM, _0.75 MPa; 10 mM, _3.5 MPa) and FA (10, 20, 25 mM, _0.75 and _3.5 MPa)
significantly reduced sclerotial production of Aspergillus strains. Overall, CA at concentrations
of 10 and 20 mM on Czapek Dox medium (CD), maize meal extract agar (MMEA) and
maize meal extract agar with sucrose and NaNO3 (MMEA S/N) inhibited sclerotium most in
the four species assayed. The data show that the sclerotia characteristics of A. flavus and
A. parasiticus were influenced by natural phytochemicals and modifications of growth
media and water potential. CA and FA could be used at high concentrations to prevent the
survival of Aspergillus species in grain.