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Characterization of two epiphytic bacteria from soybean leaves with antagonistic activities against Pseudomonas syringae pv. glycinea
Author(s) -
Völksch Beate,
Nüske Jörg,
May Rudolf
Publication year - 1996
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620360611
Subject(s) - pseudomonas syringae , biology , geotrichum , pseudomonas , microbiology and biotechnology , bacteria , pseudomonadaceae , pathogen , pseudomonadales , erwinia , strain (injury) , escherichia coli , population , biochemistry , gene , genetics , anatomy , sociology , demography
The strains 48b/90 and 22d/93 are naturally occurring ephiphytes which were isolated from soybean leaves. On the basis of pheno‐ and genotypic characteristics 48b/90 was identified as Erwinia herbicola and 22d/93 as Pseudomonas syringae . These two isolates produced biological active substances against different indicator organisms. The E. herbicola strain showed clear antagonistic properties against Escherichia coli and Pseudomonas syringae pv. glycinea , but not against Geotrichum candidum . 22d/93 was active against P. glycinea and G. candidum , but not against E. coli . Strain 48b/90 produced at least two different inhibitors: an antibiotic substance and an inhibitor of the alginate synthesis. Strain 22d/93 produced at least three different compounds inhibitory to P. glycinea and one to G. candidum . Their activities against the bacterial blight pathogen, P. glycinea , can be observed in planta , too. Under the influences of the antagonists the pathogen multiplied at lower rates and to lower stationary phase population levels. The development of bacterial blight symptoms was suppressed.