SCREENINGOF ANTAGONISTIC BACTERIA AGAINST PATHOGENIC FUNGUSOF SOYBEAN ROOT ROT AND THEIR BIOCONTROL EFFICIENCY(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Title:: SCREENINGOF ANTAGONISTIC BACTERIA AGAINST PATHOGENIC FUNGUSOF SOYBEAN ROOT ROT AND THEIR BIOCONTROL EFFICIENCY

Author(s):: Li Chunjie 　Xu Yanli 　Li Zhaolin 　Shao Hongtao; Insti tute of Northeast Geography and Agricultural Ecology , ChineseAcademy of Sciences , Harbin , 150040

Keywords:: Soybean root ro t ; Antagonistic bacteria ; Biocontrol ef ficiency

Abstract:: Three hundred and eighty eight bacterial strains were isolated f rom soybean rhizosphere soil .Twelvebacterial st rains w ere screened by the inhibition zone method ,w hich had bet ter eff icacy against the major causalagent s :Fusarium oxysporum , Fusarium solani , Rhizoctonia solani .In pot ted trial , 6 strains show ed some efficacy against pathogenic fungus of soy bean root rot .The dry w eight s of Fusarium oxysporum , Fusarium solaniw ere reduced 40 .78 %and 71 .48 %respect ively with w hich the strain B57 w as cocultured in King’ s broth(KB)liquid medium .The radius of pathogenic fungi(Fusarium oxysporum )w as reduced respectively 82 .1 % in 3dand 90 .6 %in 6d by the diffusion of strain B57 compared with that of the control .In general , the test s in vitroand in vivo show ed that st rain B57 had the best biological cont rol ef ficacy against pathogens of soybean root rot

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Last Update: 2017-01-01