西沙永乐群岛海域弧菌的分离鉴定

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从西沙永乐群岛7个岛礁海域的海水中分离出47株弧菌,将47株菌株进行16S rDNA、HSP60和gyrB扩增,序列在Genebank中进行比对,构建系统发育树.结果 显示利用16S rDNA和HSP60序列比对均无法鉴定弧菌到种.gyrB1和gyrB2引物均只能扩增出6株菌株的目标序列,gyrB3引物能扩增47株菌株的目标序列,且成功构建系统发育树,可鉴定弧菌到种.47株弧菌菌株分属于7个种,鸭公岛弧菌多样性最丰富,可分离到5种;石屿和羚羊礁筐仔沙洲弧菌多样性最低,均只分离到2种.本研究建立了可靠的海洋弧菌的分子鉴定方法,获得的菌株丰富了南海微生物菌种库,可为今后的研究与教学提供材料.
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