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Citation:

Screening and Identification of Antagonistic Bacteria Against Three Pathogenic Fungi of Orchid

  • Received Date: 2015-12-21
  • [Objective] The purpose of this study is to obtain the bacterial strains with high antagonism against Colletotrichum gloeosporioides, Fusarium oxysporum and F. solani, the fungal pathogens of orchid. [Method] In this study,the method of dual culture on plate was used to screen the bacterial strains. [Result] It was found that there were 5 strains which could inhibit all the three pathogens and the strain GT312 had the highest antagonistic activity. The results of phylogenetic analysis of 16S rRNA gene sequence revealed that GT312 had 99.93% similarity with Bacillus amyloliquefaciens type strain FZB42T. [Conclusion] Based on the morphologic and physiological characteristics, the strain GT312 was identified as B. amyloliquefaciens. It could be used as a potential bio-control agent of orchid diseases.
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Screening and Identification of Antagonistic Bacteria Against Three Pathogenic Fungi of Orchid

  • 1. Research Institute of Forestry, Chinese Academy of Forestry, State Key Laboratory of Tree Genetics and Breeding, Beijing 100091, China
  • 2. Environmental Manitering Center of Handan, Handan Hebei, 056002, China

Abstract: [Objective] The purpose of this study is to obtain the bacterial strains with high antagonism against Colletotrichum gloeosporioides, Fusarium oxysporum and F. solani, the fungal pathogens of orchid. [Method] In this study,the method of dual culture on plate was used to screen the bacterial strains. [Result] It was found that there were 5 strains which could inhibit all the three pathogens and the strain GT312 had the highest antagonistic activity. The results of phylogenetic analysis of 16S rRNA gene sequence revealed that GT312 had 99.93% similarity with Bacillus amyloliquefaciens type strain FZB42T. [Conclusion] Based on the morphologic and physiological characteristics, the strain GT312 was identified as B. amyloliquefaciens. It could be used as a potential bio-control agent of orchid diseases.

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