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Zhang M, Qian J, Xu X, Ahmed T, Yang Y, Yan C, Elsharkawy MM, Hassan MM, Alorabi JA, Chen J, Li B. Resistance of Xanthomonas oryzae pv. oryzae to Lytic Phage X2 by Spontaneous Mutation of Lipopolysaccharide Synthesis-Related Glycosyltransferase. Viruses 2022; 14:1088. [PMID: 35632829 PMCID: PMC9143033 DOI: 10.3390/v14051088] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 05/14/2022] [Accepted: 05/17/2022] [Indexed: 02/01/2023] Open
Abstract
Phage therapy is a promising biocontrol management on plant diseases caused by bacterial pathogens due to its specificity, efficiency and environmental friendliness. The emergence of natural phage-resistant bacteria hinders the application of phage therapy. Xanthomonas oryzae pv. oryzae (Xoo) is the causal agent of the devastating bacterial leaf blight disease of rice. Here, we obtained a spontaneous mutant C2R of an Xoo strain C2 showing strong resistance to the lytic phage X2. Analysis of the C2R genome found that the CDS2289 gene encoding glycosyltransferase acquired a frameshift mutation at the 180th nucleotide site, which also leads to a premature stop mutation at the 142nd amino acid. This mutation confers the inhibition of phage adsorption through the changes in lipopolysaccharide production and structure and bacterial surface morphology. Interestingly, glycosyltransferase-deficient C2R and an insertional mutant k2289 also showed reduced virulence, suggesting the trade-off costs of phage resistance. In summary, this study highlights the role of glycosyltransferase in interactions among pathogenic bacteria, phages and plant hosts, which provide insights into balanced coevolution from environmental perspectives.
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Affiliation(s)
- Muchen Zhang
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (J.Q.); (X.X.); (T.A.)
| | - Jiahui Qian
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (J.Q.); (X.X.); (T.A.)
| | - Xinyan Xu
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (J.Q.); (X.X.); (T.A.)
| | - Temoor Ahmed
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (J.Q.); (X.X.); (T.A.)
| | - Yong Yang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Y.Y.); (C.Y.)
| | - Chenqi Yan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Y.Y.); (C.Y.)
- Institute of Biotechnology, Ningbo Academy of Agricultural Sciences, Ningbo 315040, China
| | - Mohsen Mohamed Elsharkawy
- Agricultural Botany Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt;
| | - Mohamed M. Hassan
- Department of Biology, College of Science, Taif University, Taif P.O. Box 21974, Saudi Arabia; (M.M.H.); (J.A.A.)
| | - Jamal A. Alorabi
- Department of Biology, College of Science, Taif University, Taif P.O. Box 21974, Saudi Arabia; (M.M.H.); (J.A.A.)
| | - Jianping Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (Y.Y.); (C.Y.)
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Bin Li
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (J.Q.); (X.X.); (T.A.)
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Sahebi M, Tarighi S, Taheri P. The Arac-like transcriptional regulator YqhC is involved in pathogenicity of Erwinia amylovora. J Appl Microbiol 2021; 132:1319-1329. [PMID: 34480830 DOI: 10.1111/jam.15286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/28/2021] [Accepted: 08/30/2021] [Indexed: 11/29/2022]
Abstract
AIMS This study aimed to identify virulence-associated genes and functions that affect disease development on pear caused by Erwinia amylovora EaUMG3 isolated from Iran. METHODS AND RESULTS A mini-Tn5 transposon library was generated in EaUMG3. An E. amylovora mutant that had lost its ability to cause lesions on immature pear fruits, was selected for further analysis. This mutant was shown to have a transposon insertion in yqhC, a gene belongs to the AraC family of transcriptional regulators. A mutant of the wild-type EaUMG3 carrying an unmarked deletion of the yqhC gene was created using pDMS197. The Ea∆yqhC mutant showed reduced disease progression on immature pear fruits and pear plants, reduced motility and significantly lower levels of the virulence factors siderophore and amylovoran. Complementation with yqhC cloned in pBBR1MCS restored disease progression and the level of virulence factors to near wild type. CONCLUSION YqhC transcriptional regulator is necessary for full virulence of E. amylovora. In addition, this regulator affects virulence factors such as siderophore production, amylovoran production, and motility. SIGNIFICANCE AND IMPACT OF STUDY The identification of a novel transcriptional regulator with strong impact in the pathogenesis of E. amylovora, an organism causing significant economic losses in fruit production.
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Affiliation(s)
- Masood Sahebi
- Department of Plant Protection, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Saeed Tarighi
- Department of Plant Protection, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Parissa Taheri
- Department of Plant Protection, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
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Han SW, Lee MA, Yoo Y, Cho MH, Lee SW. Genome-wide Screening to Identify Responsive Regulators Involved in the Virulence of Xanthomonas oryzae pv. oryzae. THE PLANT PATHOLOGY JOURNAL 2019; 35:84-89. [PMID: 30828283 PMCID: PMC6385649 DOI: 10.5423/ppj.nt.09.2018.0193] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 06/09/2023]
Abstract
Two-component systems (TCSs) are critical to the pathogenesis of Xanthomonas oryzae pv. oryzae (Xoo). We mutated 55 of 62 genes annotated as responsive regulators (RRs) of TCSs in the genome of Xoo strain PXO99A and identified 9 genes involved in Xoo virulence. Four (rpfG, hrpG, stoS, and detR) of the 9 genes were previously reported as key regulators of Xoo virulence and the other 5 have not been characterized. Lesion lengths on rice leaves inoculated with the mutants were shorter than those of the wild type and were significantly restored with gene complementation. The population density of the 5 mutants in planta was smaller than that of PXO99A at 14 days after inoculation, but the growth curves of the mutants in rich medium were similar to those of the wild type. These newly reported RR genes will facilitate studies on the function of TCSs and of the integrated regulation of TCSs for Xoo pathogenesis.
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Affiliation(s)
- Sang-Wook Han
- Department of Integrative Plant Science, Chung-Ang University, Anseong 17546,
Korea
| | - Mi-Ae Lee
- Graduate School of Biotechnology, Kyung Hee University, Yongin 17104,
Korea
- Crop Biotech Institute, Kyung Hee University, Yongin 17104,
Korea
| | - Youngchul Yoo
- Graduate School of Biotechnology, Kyung Hee University, Yongin 17104,
Korea
- Crop Biotech Institute, Kyung Hee University, Yongin 17104,
Korea
| | - Man-Ho Cho
- Graduate School of Biotechnology, Kyung Hee University, Yongin 17104,
Korea
| | - Sang-Won Lee
- Graduate School of Biotechnology, Kyung Hee University, Yongin 17104,
Korea
- Crop Biotech Institute, Kyung Hee University, Yongin 17104,
Korea
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