Author:
Huang Li,Liu Mafeng,Zhu Dekang,Xie Li,Huang Mi,Xiang Chen,Biville Francis,Jia Renyong,Chen Shun,Zhao Xinxin,Yang Qiao,Wu Ying,Zhang Shaqiu,Huang Juan,Ou Xumin,Mao Sai,Gao Qun,Sun Di,Tian Bin,Wang Mingshu,Cheng Anchun
Abstract
In a previous study, it was shown that Riemerella anatipestifer, a member of Flavobacteriaceae, is naturally competent. However, whether natural competence is universal in Flavobacteriaceae remains unknown. In this study, it was shown for the first time that Riemerella columbina was naturally competent in the laboratory condition; however, Flavobacterium johnsoniae was not naturally competent under the same conditions. The competence of R. columbina was maintained throughout the growth phases, and the transformation frequency was highest during the logarithmic phase. A competition assay revealed that R. columbina preferentially took up its own genomic DNA over heterologous DNA. The natural transformation frequency of R. columbina was significantly increased in GCB medium without peptone or phosphate. Furthermore, natural transformation of R. columbina was inhibited by 0.5 mM EDTA, but could be restored by the addition of CaCl2, MgCl2, ZnCl2, and MnCl2, suggesting that these divalent cations promote the natural transformation of R. columbina. Overall, this study revealed that natural competence is not universal in Flavobacteriaceae members and triggering of competence differs from species to species.
Funder
Sichuan Veterinary Medicine and Drug Innovation Group of China Agricultural Research System
National Natural Science Foundation of China
China Agricultural Research System
Subject
Microbiology (medical),Microbiology
Cited by
4 articles.
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