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Identification of 12-methyltetradecanoic acid from endophytic Senotrophomonas maltophilia as inhibitor of appressorium formation of Magnaporthe oryzae

Journal of the Korean Society for Applied Biological Chemistry volume 53, pages 578–583 (2010)Cite this article

Abstract

The rice blast fungus Magnaporthe oryzae is an extremely effective plant pathogen that produces specialized infectious structures known as appressoria. Four hundred thirty eight endophytic bacterial strains were isolated from trees growing in Vietnam and screened for antifungal activity. A strain of a Gram-negative bacterium, Stenotrophomonas maltophilia was found to have an activity that inhibits appressorium formation of M. Oryzae. Activity-guided fractionation of the bacterial extract yielded a hydrophobic active fraction, which was purified through MPLC and PTLC, and analyzed by GC-MS. Three kinds of fatty acid, 13-methyltetradecanoic acid, 12-methyltetradecanoic acid (12-MTA), and palmitic acid were identified from the active fraction, among which, only 12-MTA had the activity. It specifically inhibited the appressorium formation with IC50 value of 83.5 μM. The action mechanism and agrochemical use of 12-MTA should be further studied.

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Authors and Affiliations

  1. Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, 151-921, Seoul, Republic of Korea

    Yul-Taek Jeon, Eun-Mi Jun, Ki-Bong Oh & Soo-Un Kim

  2. Forest Science Institute of Vietnam, Dong Ngac, Tu Liem, Hanoi, Vietnam

    Pham Quang Thu

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  1. Yul-Taek Jeon
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  2. Eun-Mi Jun
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  3. Ki-Bong Oh
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  4. Pham Quang Thu
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  5. Soo-Un Kim
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Correspondence to Pham Quang Thu or Soo-Un Kim.

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YTJ and EMJ contributed equally to this work.

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Jeon, YT., Jun, EM., Oh, KB. et al. Identification of 12-methyltetradecanoic acid from endophytic Senotrophomonas maltophilia as inhibitor of appressorium formation of Magnaporthe oryzae . J. Korean Soc. Appl. Biol. Chem. 53, 578–583 (2010). https://doi.org/10.3839/jksabc.2010.089

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  • DOI: https://doi.org/10.3839/jksabc.2010.089

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