Bioscience, Biotechnology, and Biochemistry 2012-01-01

Isolation of borrelidin as a phytotoxic compound from a potato pathogenic streptomyces strain.

Zhisheng Cao, Gholam Khodakaramian, Kenji Arakawa, Haruyasu Kinashi

Index: Biosci. Biotechnol. Biochem. 76(2) , 353-7, (2012)

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Abstract

Streptomyces species strain GK18, isolated in Iran, induced deep-pitted lesions on potato tubers, lesions different from the raised lesions induced by the usual scab-causing phytotoxin, thaxtomin. In addition, neither thaxtomin production nor hybridization to its biosynthetic probe was detected for strain GK18, suggesting the production of a different phytotoxin. The active component was extracted with ethyl acetate from culture filtrate of strain GK18, purified by gel filtration and silica gel chromatography, and identified as an 18-membered macrolide, borrelidin, by spectroscopic analysis. The purified borrelidin induced necrosis on potato tuber slices and inhibited the growth of shoots and roots of radish seedlings. This is the first report on the phytotoxicity of borrelidin as a possible causative compound of potato scab disease.

Related Compounds

  • (-)-borrelidin

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