Identification of Streptomyces sp. Producing New Polyene Antibiotics and In Vivo Antimicrobial Activity of Tetrin C Against Phytopathogenic Fungi

  • CHOI, WON-CHANG (Department of Clinical Pathology, Hyechun College) ;
  • SEOK-YEON HWANG (Department of Clinical Pathology, Chungbuk National University Hospital) ;
  • TAE-KYU PARK (Department of Life Science, College of Natural Science, Konkuk University) ;
  • SI-KWAN KIM (Department of Life Science, College of Natural Science, Konkuk University)
  • Published : 2002.04.01

Abstract

A Streptomyces sp. isolated from a soil sample collected in Taejeon, Korea has previously been found to produce two new polyene antibiotics. The two new antibiotics were named "16-methyloxazolomycin (antibacterial)" and "tetrin C (antifungal)", and their chemical structures are presented elsewhere [10, 11]. In the current study, chemotaxonomy, numerical taxonomy, and ISP methods were all employed for the taxonomic study. The spore chains were spirales and the spore surface was smooth. The spore mass was a gray series and no melanin pigment was produced. On the basis of the morphological and physiological properties, the microorganism was identified to be Streptomyces erumpens, belonging to the gray series of category IV, as defined by Bergey′s Manual. Tetrin C at the concentration of 20 ${\mu}g$/ml demonstrated a potent in vivo (pot test) preventive effect against rice blast, rice sheath blight, cucumber gray mold, wheat powdery mildew, and barley leaf rust.

Keywords

References

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