Plant Growth-Promoting Effects of Antagonistic Bacillus sp. YJ-3 against Fusarium Wilt of Watermelon-Rootstock Gourd

수박 만할병균에 길항하는 Bacillus sp. YJ-3에 의한 대목용 참박 생육촉진효과

  • Kim, Jin-Ho (Dept. of Plant Resources, Sangju National University) ;
  • Choi, Yong-Hwa (Dept. of Plant Resources, Sangju National University) ;
  • Joo, Gil-Jae (Dept. of Agricultural Chemistry, Kyungpook National University)
  • Published : 2001.03.30

Abstract

Twelve antagonistic strains against Fusarium wilt of watermelon-rootstock gourd were selected from 54 bacterial isolates which were isolated from the rhizosphere of crop plants growing in various locations. They showed strong inhibitory effects on growth of Fusarium osysporum f. sp. niveum, the causal agent of watermelon-rootstock gourd Fusarium wilt. Among these antagonists, the isolate YJ-3 was the most pronounced in growth-promoting ability for watermelon-rootstock gourd. The growth of watermelon-rootstock gourd in bed soil inoculated with YJ-3 was better by 46 and 13% than those in commercial bed soil alone and in bed soil inoculated with commercial microbial inoculant, respectively. The antagonistic plant growth-promoting rhizobacterium, strain No. YJ-3, was identified as Bacillus sp. on MIDI system. Furthermore, Bacillus sp. YJ-3 showed antifungal activity on growth against Alternaria cucumerina, Botrytis cinerea, Colletotrichum orbiculare, Didymella bryoniae, Rhizoctonia solani and Fusarium oxysporum.

Keywords

Antagonistic;plant growth-promoting rhizobacteria;watermelon-rootstock gourd;Fusarium wilt