期刊
FOREST PATHOLOGY
卷 39, 期 4, 页码 239-248出版社
WILEY
DOI: 10.1111/j.1439-0329.2008.00583.x
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资金
- EU INCO
- Biotechnology and Biological Sciences Research Council
P>A methodological molecular procedure, which included extraction and cloning of the ITS1/2 rDNA of root-associated organisms with subsequent transformation and sequencing of representative clones, was effective for detection, discrimination and determination of the frequency of the main damping-off pathogens in roots of Pinus sylvestris seedlings growing in different forest-tree nursery soils and exhibiting different rates of disease progress. Roots exhibiting slower damping-off progression were colonized by Fusarium oxysporum, Neonectria radicicola (Ascomycota) and Pythium spp. (Oomycota), which comprised 50% of the microbial community. Roots exhibiting faster damping-off progression were dominated by Thanatephorus cucumeris (Basidiomycota), which comprised 80% of the microbial community. The microbial community was more diverse in roots with slower damping-off progression (14 species) than in roots with faster disease progression (seven species).
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