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|Title: ||Environmental dynamics of Bacillus amyloliquefaciens CCMI1051 antifungal activity under different nitrogen patterns|
|Authors: ||Caldeira, A Teresa|
Arteiro, J M
Coelho, A M
Roseiro, J C
|Keywords: ||phytopathogenic fungi|
|Issue Date: ||2008|
|Citation: ||Caldeira A.T., Savluchinske-Feio S., Arteiro Santos J.M., Coelho, A.V., Roseiro J.C (2008) Environmental dynamics of Bacillus amyloliquefaciens CCMI1051 antifungal activity under different nitrogen patterns. Journal of Applied Microbiology, 104, 808–816.|
Aims: The aim of this study was to evaluate the influence of environmental
conditions on the antifungal activity of the Bacillus sp. CCMI 1053 cultures.
Methods and Results: The electrospray ionization mass spectra (ESI-MS) analysis
was used to detect the active peptides produced by Bacillus amyloliquefaciens
CCMI 1051 cultures in a glucose-containing medium to which four different
nitrogen sources were added. The cultures produced different patterns of Bacillus
sporulation and distinct antifungal activity of the cell-free culture broths.
Conclusions: The highest sporulation obtained corresponds to higher antifungal
activity when it is formed after 3 days of microbial growth. The antifungal
activity against Trichoderma harzianum CCMI 783 is more influenced by the
concentration on the nitrogen source than the culture time of incubation. The
association of nitrogen concentration and the time of incubation is particularly
relevant in the expression of the antifungal activity.
Significance and Impact of the Study: The present findings allow the reduction
of the use of chemical pesticides and to limit some plant diseases. The association
of the nitrogen source and the time of incubation is a novelty, which
would improve the production of secondary metabolites. Both economical and
environmental benefits arise from the study.|
|Appears in Collections:||CQE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
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