Bacterial endophytes were found from 6 plant leaves among 35 plant leaves screened. Two of the isolated bacteria showed antagonistic
activity against fungal plant pathogens. An isolate named KL1 showed the clear inihibition against plant pathogens, Fusarium
oxysporum and Rhizoctonia solani, on PDA as well as TSA plate. Supernatant of the bacterial culture also showed the clear inhibition
against the fungal growth on the plate and the antibiotic substance was identified as iturin A by HPLC analysis. KL1 was identified
as Bacillus sp. from the 16S rRNA gene analysis. Very thin hyphae of R. solani was miccroscopically observed when the fungus was
co-cultivated with KL1.