Journal
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
Volume 22, Issue 12, Pages 1259-1266Publisher
SPRINGER
DOI: 10.1007/s11274-006-9170-0
Keywords
fengycin; surfactin; Bacillus amyloliquefaciens; antimicrobial activity; endophyte
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An endophytic bacterium was isolated from Chinese medicinal plant Scutellaria baicalensis Georgi. The phylogenetic and physiological characzterization indicated that the isolate, strain ES-2, was Bacillus amyloliquefaciens, which produced two families of secondary metabolites with broad-spectrum antibacterial and antifungal activities. Culture filtrate of ES-2 displayed antagonism against some phytopathogenic, food-borne pathogenic and spoilage bacteria and fungi owing to the existence of antimicrobial compounds. A HPLC-MS analysis showed two series of ion peaks from the culture filtrate. A further electrospray ionization/collision-induced dissociation spectrum revealed that the two series ion peaks represented different fengycin homologues and surfactin homologues, respectively, which had a potential for food preservation and the control of several fungal plant diseases.
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