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2008•Journal of Biological ControlRequires access

Antagonistic Rhizobacteria Strain Bacillus subtilis S-1 against Banana Fusarium Wilt

Zhenzhong Wang

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Abstract

A total of 74 bacteria strains were isolated from rhizosphere of healthy banana.Among those strains,isolate S-1 showed strong antifungal activity against growth of pathogen Fusarium oxysporum f.sp.cubens,which caused banana fusarium wilt disease.In vitro condition,the relative inhibited efficiency of hyphal growth was above 76.6%.Isolate S-1 showed a wide range of antagonism against pathogens,such as F.oxysporum f.sp.lycopersici,Curvularia lunata,Colletotrichum gloeosporioides,F.oxysporium f.sp.vasinfectum,Verticillium dahliae,Gibberella zeae,and F.oxysporum f.sp.niveum.The strain was identified as Bacillus subtilis by Biolog analysis.16S rDNA sequence showed that isolate S-1 shared 100% homology with published sequence of B.subtilis. The optimal cultural conditions for isolate S-1 were media of PYTG or PDA,and the pH 7.8-8.0,temperature 26-30℃,cultural time 40-48 h.

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What this paper is about

A total of 74 bacteria strains were isolated from rhizosphere of healthy banana.Among those strains,isolate S-1 showed strong antifungal activity against growth of pathogen Fusarium oxysporum f.sp.cubens,which caused banana fusarium wilt disease.In vitro condition,the relative inhibited efficiency of hyphal growth was above 76.6%.Isolate S-1 showed a wide range of antagonism against pathogens,such as F.oxysporum f.sp.lycopersici,Curvularia lunata,Colletotrichum gloeosporioides,F.oxysporium f.sp.vasinfectum,Verticillium dahliae,Gibberella zeae,and F.oxysporum f.sp.niveum.The strain was identified as Bacillus subtilis by Biolog analysis.16S rDNA sequence showed that isolate S-1 shared 100% homology with published sequence of B.subtilis. The optimal cultural conditions for isolate S-1 were media of PYTG or PDA,and the pH 7.8-8.0,temperature 26-30℃,cultural time 40-48 h.

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Available abstract

A total of 74 bacteria strains were isolated from rhizosphere of healthy banana.Among those strains,isolate S-1 showed strong antifungal activity against growth of pathogen Fusarium oxysporum f.sp.cubens,which caused banana fusarium wilt disease.In vitro condition,the relative inhibited efficiency of hyphal growth was above 76.6%.Isolate S-1 showed a wide range of antagonism against pathogens,such as F.oxysporum f.sp.lycopersici,Curvularia lunata,Colletotrichum gloeosporioides,F.oxysporium f.sp.vasinfectum,Verticillium dahliae,Gibberella zeae,and F.oxysporum f.sp.niveum.The strain was identified as Bacillus subtilis by Biolog analysis.16S rDNA sequence showed that isolate S-1 shared 100% homology with published sequence of B.subtilis. The optimal cultural conditions for isolate S-1 were media of PYTG or PDA,and the pH 7.8-8.0,temperature 26-30℃,cultural time 40-48 h.

Key concepts: Biology, Fusarium oxysporum, Fusarium wilt, Rhizosphere, Antagonism, Bacillus subtilis, Verticillium, Microbiology

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