Endophytic bacterial communities in ginseng and their antifungal activity against pathogens

被引:146
作者
Cho, Kye Man
Hong, Su Young
Lee, Sun Mi
Kim, Yong Hee
Kahng, Goon Gjung
Lim, Yong Pyo
Kim, Hoon
Yun, Han Dae [1 ]
机构
[1] Gyeongsang Natl Univ, Div Appl Life Sci, Chinju 660701, South Korea
[2] Gyeongsang Natl Univ, Res Inst Agr & Life Sci, Chinju 660701, South Korea
[3] Chungnam Natl Univ, Dept Hort, Taejon 305764, South Korea
[4] Sunchon Natl Univ, Dept Agr Chem, Sunchon, South Korea
关键词
D O I
10.1007/s00248-007-9208-3
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Plant roots are associated with diverse communities of endophytic bacteria which do not exert adverse effects. The diversity of bacterial endophytes associated with ginseng roots cultivated in three different areas in Korea was investigated. Sixty-three colonies were isolated from the interior of ginseng roots. Phylogenetic analysis based on 16S rRNA gene sequences showed that the isolates belonged to three major phylogenetic groups: the high G+C Gram-positive bacteria (HGCGPB), low G+C Gram-positive bacteria (LGCGPB), and the Proteobacteria. The dominant species at the three different ginseng growing areas were: HGCGPB at Ganghwa (55.0%), LGCGPB at Geumsan (45.5%), and Proteobacteria at Jinan (61.9%). Most cellulase-, xylanase-, and pectinase-producing colonies among the isolates belong to the LGCGPB group, except for Pectobacterium carotovora which belonged to the Proteobacteria. The 13 isolates belonging to LGCGPB and Proteobacteria were assessed for their antifungal activity against phytopathogenic fungi such as Rhizoctonia solani. Among them, Paenibacillus polymyxa GS01, Bacillus sp. GS07, and Pseudomonas poae JA01 show potential activity as biocontrol agents against phytopathogenic fungi. Finally, most of the low G+C Gram-positive bacteria with antifungal activity against phytopathogenic microorganisms showed cellulolytic enzyme activity while some Proteobacteria with the antifungal activity and the high G+C Gram-positive bacteria did not show any cellulolytic activity.
引用
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页码:341 / 351
页数:11
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