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Identification of Species and Effect of Six Rhizosphere Microorganisms Involved in Peach Replant Diseases

Author: ZuoRuiJie
Tutor: MaHuanPu；LiuZhiMin；LiuZhengPing
School: Beijing University of Agriculture
Course: Pomology
Keywords: Peach Re Plant Pathology Bacterial Antagonistic bacteria
CLC: S436.621
Type: Master's thesis
Year: 2009
Downloads: 32
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Abstract


Now, with the development of industrialization , large-scale production of peaches , peach trees replanted disease worsening . This paper peach rhizosphere six cyanide - resistant microorganisms screened for the study, its identification and interaction studies , to provide the basis and reference for the peach trees replanted pathosystem mechanism and biological . Combined with the biological characteristics of 16S rDNA sequence analysis and identification of the three bacteria (CN-X4, CN-X9, CN-X17) and three actinomycetes ( CN- G2 the CN -G3 , CN- G5) , of which 3 strains of bacteria as a carbon source to produce hydrogenated cyanide ( HCN ) Amygdalin three strains of actinomycetes were different inhibition of the three bacteria . Design pot experiment , the detection effect resistant to cyanide in the soil environment actinomycetes and cyanobacteria resistance and biocontrol actinomycetes role . The identification results show that strain CN- X4 , CN - X17 are in the genus Agrobacterium tumefaciens ( Agrobacterium tumefaciens ) , but belong to different variants ; strains CN-X9 for Pseudomonas ( Pseudomonas sp) , strains CN -G2 and CN-G5 , respectively the fine yellow Streptomyces ( of Strep tomyces microfla vus ) , lavendulae Streptomyces (Strep tomyces la vendulae), strains CN-G3 may be gray related species of Streptomyces (Streptomyces griseus) ; facilities into three cyanide - resistant bacteria was applied to 6 rhizosphere microbial sterilization replanted soil can promote the growth of peach seedlings potted biocontrol effect significant ; antagonistic Actinomycetes antagonistic actinomycetes bacteria CN-G5 exothermic effect is most significant destruction ; rhizosphere microbial flora balance is one of the key factors that lead peach Plant Pathology

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CLC: > Agricultural Sciences > Plant Protection > Pest and Disease Control > Horticultural Crops Pest and Disease Control > Fruit tree pests and diseases > Stone fruit pests and diseases > Peach pests and diseases
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