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Exploring the pathogenic function of Pantoea ananatis endogenous plasmid by an efficient and simple plasmid elimination strategy

Authors :
Liming Wu
Qin Gu
Hai Huang
Alvina Hanif
Huijun Wu
Xiaozhen Zhao
Yi Zhao
Lu Gao
Xuewen Gao
Source :
Microbiological Research. 246:126710
Publication Year :
2021
Publisher :
Elsevier BV, 2021.

Abstract

The bacterium Pantoea ananatis is associated with devastating plant diseases that cause serious economic losses. Strain DZ-12 was previously isolated from maize brown rot leaves in Hebei Province, China and its genome sequencing revealed that it belongs to P. ananatis. It contains a large, endogenous plasmid, pDZ-12. Different studies have shown that virulence determinants are frequently carried on plasmids. To determine whether pDZ-12 from P. ananatis has any effect on pathogenicity, the plasmid was eliminated by substituting its native replication genes with temperature-sensitive replication genes. The resulting temperature-sensitive plasmid could be cured by growing cells at high temperature (37℃). Loss of pDZ-12 from P. ananatis DZ-12 led to a decreased disease severity in maize plants suggesting that the endogenous plasmid is important for pathogenesis. Loss of pDZ-12 also affected the ability of the bacterium to form biofilms. The study provides the first evidence that the endogenous plasmid of P. ananatis DZ-12 is important for pathogenesis in maize plants and carries genes involved in biofilm formation. This study also presents the first report on curing a plasmid from P. ananatis.

Details

ISSN :
09445013
Volume :
246
Database :
OpenAIRE
Journal :
Microbiological Research
Accession number :
edsair.doi.dedup.....d27d76eed945f359576538188f325d5b
Full Text :
https://doi.org/10.1016/j.micres.2021.126710