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冰核细菌分离鉴定及拮抗菌筛选

JOURNAL of AGRICULTURAL CATASTROPHOLOGY(2018)

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Abstract
为了解贵州植物上冰核细菌的种类及分布,采用平板稀释法分离细菌和拮抗菌、小液滴冻结法鉴定冰核细菌、双层平板法筛选拮抗菌,通过形态学特征、生理生化指标结合16S rDNA序列对比分析等方法鉴定冰核细菌和拮抗菌的种类.结果表明,从贵州59种霜冻植物上分离到7株冰核细菌,从32份土壤中筛选到3株拮抗菌.经鉴定,7株冰核细菌中,1株为成团泛菌(Pantoea agglomerans),1株为菠萝泛菌(Pantoea ananatis),1株为荧光假单胞(Pseudomonas fluorescens),2株为丁香假单胞菌(Pseudomonas syringae),2株为绿黄假单胞菌(Pseudomonas viridiflava).3株拮抗菌中,1株放线菌为暗产色链霉菌(Strepto-myces phaeochromogenes),2株细菌均为解淀粉芽孢杆菌(Bacillus amyloliquefaciens).
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