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Biocontrol of Korean Ginseng Root Rot Caused by Phytophthora cactorum Using Antagonistic Bacterial Strains ISE13 and KJ1R5

  • Sang, Mee-Kyung ;
  • Chiang, Mae-Hee ;
  • Yi, Eun-Seob ;
  • Park, Kuen-Woo ;
  • Kim, Ki-Deok
  • Published : 2006.03.01

Abstract

In this biocontrol research, we evaluated disease suppressive effects of antagonistic bacterial strains ISE13 and KJ1R5 against Korean ginseng root rot caused by P. eaetorum. We also examined the effects of nutrient solution in the hydroponic culture system for Korean ginseng on biological activity of the bacterial strains. As results of dual culture tests of the bacterial strains on $V_{8}$ juice agar, the strain ISE13 showed antifungal activity against P. eaetorum and other plant pathogenic fungi, but the strain KJ1R5 did not. When their inhibitory effects against infection of P. eaetorum on the roots grown in either nutrient solution or water were tested, the strains ISE13 and KJ1R5 inhibited the disease severity of Korean ginseng roots only grown with water, compared to buffer-treated, inoculated controls. However, the nutrient solution used for hydroponic cultures of ginseng in pots caused higher levels of disease severity by the strains ISE13 and KJ1R5 from 418.8\%$ to 40.0\%$ and from 24.3\%$ to 45.0\%$, respectively. In this study, the bacterial strains ISE13 and KJ1R5 could be potentially biocontrol agents to suppress Korean ginseng root rot caused by P. eaetorum. However, more attention using nutrient solution in hydroponic cultures for Korean ginseng production should be applied in biocontrol of plant diseases using the antagonistic microorganisms.

Keywords

antagonistic bacteria;biocontrol;Korean ginseng;Phytophthora cactorum;root rot

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  2. Environmental Factors on the Development of Root Rot on Ginseng Caused by Cylindrocarpon destructans vol.20, pp.2, 2014, https://doi.org/10.5423/RPD.2014.20.2.087
  3. Draft Genome Sequence of a Biocontrol Rhizobacterium,Chryseobacterium kwangjuenseStrain KJ1R5, Isolated from Pepper (Capsicum annuum) vol.4, pp.2, 2016, https://doi.org/10.1128/genomeA.00301-16
  4. Biological control of Phytophthora blight of pepper by antagonistic rhizobacteria selected from a sequential screening procedure vol.46, pp.3, 2008, https://doi.org/10.1016/j.biocontrol.2008.03.017
  5. Soil Environment and Soil-borne Plant Pathogen Causing Root Rot Disease of Ginseng vol.45, pp.3, 2012, https://doi.org/10.7745/KJSSF.2012.45.3.370