Soil samples were taken from healthy tobacco plant rhizosphere in Phytophthora nicotianae severely infected tobacco field in Hunan Province to screen out antagonistic strains against Phytophthora nicotianae by the pla...Soil samples were taken from healthy tobacco plant rhizosphere in Phytophthora nicotianae severely infected tobacco field in Hunan Province to screen out antagonistic strains against Phytophthora nicotianae by the plate confrontation method.Subsequently,we had obtained a strain LZW-118 which had an obvious inhibitory effect on Phytophthora nicotianae with the plate inhibition rate of 71.14%.The strain LZW-118 was identified as Burkholderia vietnamiensis based on morphological,physiological and biochemical characteristics analysis and 16 S rDNA sequence.The growth-promoting potential test results showed that the strain not only had a significant inhibitory effect on Phytophthora nicotianae but also had the functions of nitrogen fixation,phosphorus dissolution and growth promotion for tobacco plant height,leaf length,leaf width and the number of leaves,showing a good application potential in biological control.展开更多
文摘Soil samples were taken from healthy tobacco plant rhizosphere in Phytophthora nicotianae severely infected tobacco field in Hunan Province to screen out antagonistic strains against Phytophthora nicotianae by the plate confrontation method.Subsequently,we had obtained a strain LZW-118 which had an obvious inhibitory effect on Phytophthora nicotianae with the plate inhibition rate of 71.14%.The strain LZW-118 was identified as Burkholderia vietnamiensis based on morphological,physiological and biochemical characteristics analysis and 16 S rDNA sequence.The growth-promoting potential test results showed that the strain not only had a significant inhibitory effect on Phytophthora nicotianae but also had the functions of nitrogen fixation,phosphorus dissolution and growth promotion for tobacco plant height,leaf length,leaf width and the number of leaves,showing a good application potential in biological control.
