Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Suppression of Clubroot Formation in Chinese Cabbage by the Chitin Compost and Broth

  • Jin Rong De (Division of Applied BioScience and Biotechnology, and Environmental-Friendly Agriculture Research Center, Chonnam National University) ;
  • Han Tae-o (Institute of Agricultural Science and Technology, Chonnam National University, Gwangju) ;
  • Kim Yong-oong (Division of Applied BioScience and Biotechnology, and Environmental-Friendly Agriculture Research Center, Chonnam National University) ;
  • Kim Kil-ong (Division of Applied BioScience and Biotechnology, and Environmental-Friendly Agriculture Research Center, Chonnam National University)
  • Published : 2006.12.31
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Abstract

Chitin compost and broth were used to suppress club root. Individual cabbage seedlings were transplanted into pots(3500 ml) containing a mixture of 3% chitin compost and 50 ml of chitin broth (T1) or the same quantity control compost and control compost broth(T2). The media in each pot was then infected with Plasmodiophora brassicae. Samples were taken at 6, 7 and 8 weeks after transplanting. The population of chitinase producing bacteria in T1 was consistently larger than that observed in T2. Chitinase activity in the T1 rhizosphere was two-fold greater than that of T2 at each time point observed. Shoot dry weight, leaf number and leaf area in T1 were enhanced 20%, 10% and 12% relative to those seen in T2, respectively. The disease index and root mortality at 8 weeks after transplanting were reduced by 50% and 25% in T1 compared to T2, respectively. Results presented in this study are strongly indicative that chitin compost and broth suppress clubroot in Chinese cabbage.

Keywords

References

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