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Biol. Res ; 42(3): 297-304, 2009. ilus
Article in English | LILACS | ID: lil-531963

ABSTRACT

Gallic acid was artificially added to the media to grow Fusarium oxysporum f.sp.niveum to investigate its effect on the pathogenic fungus. Results indicate that gallic acid inhibited the growth of F. oxysporum f.sp.niveum. The colony diameter, the conidia germinating rate and the conidia yield were reduced by 5.7-22.9 percent percent, 35.8-55.6 percent and 38.9-62.2 percent respectively. However, the virulence factors by the fungus were stimulated. The activity of pectinase, proteinase and cellulase increased by 12.3-627.8 percent, 11.8-41.2 percent and 0.5-325.0 percent respectively, while the activity of amylase increased slightly. The results suggest that gallic acid repressed growth but facilitated the relative pathogenicity of invading pathogens.


Subject(s)
Culture Media/pharmacology , Fusarium/drug effects , Gallic Acid/pharmacology , Spores, Fungal/drug effects , Colony Count, Microbial , Culture Media/chemistry , Fusarium/growth & development , Fusarium/pathogenicity , Spores, Fungal/growth & development , Spores, Fungal/pathogenicity , Virulence Factors
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