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嗜水气单胞菌cpxRA缺失株构建及生物学特性研究
Authors
冯宇晴()
吴振兵()
+5 more
张倩倩()
张兰梨()
李爱华()
王谢昊()
陈辉()
Publication date
1 January 2018
Publisher
Abstract
为了探讨Cpx系统在嗜水气单胞菌生长及毒力等方面发挥的作用,利用融合PCR和基因同源重组原理,以自杀质粒pRE112为载体构建缺失57—1879 bp序列的cpx R-A基因簇突变株Δcpx,然后比较缺失株和野生株在生长、生物膜形成、应激耐受及毒力等生物学特性方面的差异。普通PCR及荧光定量PCR结果验证了突变株中cpx RA基因簇片段的部分缺失,表明突变株构建成功;生物学特性研究结果显示,突变株在形态、生长、生物膜形成及毒力等方面与野生株没有显著差异,两者主要在应对高渗透压、SDS(十二烷基磺酸钠)刺激及含有EDTA(乙二胺四乙酸二钠)或多黏菌素B环境表现不同。结果表明Cpx双组分系统在嗜水气单胞菌应对外界刺激方面扮演着重要角色,但在毒力方面则可能处于次要地位
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Institute of Hydrobiology, Chinese Academy Of Sciences
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Last time updated on 23/01/2021