Document Detail

Environmental dynamics of Bacillus amyloliquefaciens CCMI 1051 antifungal activity under different nitrogen patterns.
MedLine Citation:
PMID:  17953685     Owner:  NLM     Status:  MEDLINE    
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.
A T Caldeira; S S Feio; J M S Arteiro; A V Coelho; J C Roseiro
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2007-10-22
Journal Detail:
Title:  Journal of applied microbiology     Volume:  104     ISSN:  1365-2672     ISO Abbreviation:  J. Appl. Microbiol.     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-02-21     Completed Date:  2008-05-23     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  9706280     Medline TA:  J Appl Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  808-16     Citation Subset:  IM    
Universidade de Evora, Departamento de Química, Evora, Portugal.
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MeSH Terms
Antifungal Agents / biosynthesis,  pharmacology*
Bacillus / metabolism*,  physiology
Bacteriological Techniques
Bioreactors / microbiology
Microbial Sensitivity Tests
Nitrogen / metabolism
Spectrometry, Mass, Electrospray Ionization
Spores, Bacterial
Trichoderma / drug effects
Reg. No./Substance:
0/Antifungal Agents; 7727-37-9/Nitrogen

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