Isolation of Endophytic Bacteria from Solanum sp.and Their Antibacterical Activity against Plant Pathogenic Bacteria

Abstract

Endophyiic bacteria reside wlthin plant hosts without causing disease symptoms. In this study, seventy three endophylic bacterial isolates were isolated from the roots of Solawam sp. plants. The isolates were further subdivided into 15 groups based on the phenotypic characteristics. Some of these isolates were preliminarily classincd as membcrs of the genus Bacillus and fluorescent pseudomonads. Of 73 isolates, 40 were found to have in vitro antagonistic activity against various plant pathogenic bacteria. The isolate designated Kutoxl201 exhibited a wide range of inhibition against tested plant pathogenic bacteria. The Gram positive phytopathogenic bacterium, Clavibacter michiganensis subsp. udchigawensis was inhibited to the most by the isolates tested. The ability of these isolates to suppress the growih of various phyiopathogenic bacteria makes them potential biocontrol agents.