Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Selection of Biocontrol Agents against Phytophthora Blight of Pepper and Its Root Colonization Ability

고추역병 생물적방제 근권세균의 선발 및 근권정착 능력 연구

  • 장리경 (중국 하남농업대학 식물보호학원) ;
  • 사홍종 (중국 신양농업고등전문대학) ;
  • 왕정정 (중국 하남농업대학 식물보호학원) ;
  • 상숙한 (중국 하남농업대학 식물보호학원) ;
  • 신순선 (중국 하남농업대학 식물보호학원)
  • Received : 2010.04.09
  • Accepted : 2010.06.23
  • Published : 2010.08.01
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Abstract

Four promising biocontrol agents against Phytophthora capsici were selected from 507 bacterial isolates collected from rhizosphere soils and roots of pepper plants. In vitro experiment, these four biocontrol agents inhibited mycelial growth, germination of cystospores, and formation of zoosporangia and zoospores of Phytophthora capsici. In the pot experiment, the four biocontrol agents showed control efficiency higher than 70%. In greenhouse experiment, the isolates G28-6 gave the control value of 79.4%. These four biocontrol agents successfully colonized in the population density beyond 105 cfu/g on roots of pepper in vitro. The isolates G28-6 was identified as Pseudomonas aurantiaca, based on its cultural, morphological, and biochemical characterization and 16S rRNA gene sequence analysis.

하남성지역의 고추역병 발병포장 건전한 고추뿌리와 근권토양에서 세균 507균주를 분리하였는데, 그중에서 고추역병균에 길항효과가 우수한 G28-6, G28-5, I7-6과 H14-1균주를 선발하였다. In vitro에서 선발된 균주들은 고추역병균의 균사생장, 유주자낭과 유주자 형성, 그리고 피낭포자의 발아를 현저하게 억제하였고, Pot시험에서 선발된 균주 모두 70% 이상의 방제효과를 나타냈고, 포트시험에서 방제효과가 우수하였던 G28-6균주는 고추역병 자연발생 비닐하우스에서 79.4%의 방제가를 보여 공시된 화학농약 80% Mancozeb 보다 훨씬 높은 방제효과를 보였다. 뿐만 아니라 선발된 4균주 모두 in vitro에서 우수한 근권정착능력을 보였다. 고추역병 방제에 우수한 길항세균으로 선발된 G28-6균주의 16S rRNA gene 염기서열분석과 그의 형태적, 생리적 특성들을 Bergey's manual of Systematic Bacteriology를 기준으로 비교하여 Pseudomonas aurantiaca로 동정하였다.

Keywords

References

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  1. Control Effects of 3-(4-Hydroxyphenyl)-propionic Acid Isolated Xenorhabdus nematophila K1 against Phytophthora Blight and Anthracnose of Red Pepper vol.19, pp.3, 2013, https://doi.org/10.5423/RPD.2013.19.3.208
  2. Control Efficacy of Mixing Application of Microbial and Chemical fungicide against Phytophthora blight of red-pepper vol.17, pp.4, 2013, https://doi.org/10.7585/kjps.2013.17.4.460