Research Article

Determination of the Lytic Activity and Host Range of Bacteriophages Isolated Against Xanthomonas phaseoli pv. phaseoli and Xanthomonas citri pv. Fuscans

Number: Advanced Online Publication Early Pub Date: April 11, 2026
TR EN

Determination of the Lytic Activity and Host Range of Bacteriophages Isolated Against Xanthomonas phaseoli pv. phaseoli and Xanthomonas citri pv. Fuscans

Abstract

In this study, the in vitro biocontrol potential of bacteriophages against Xanthomonas phaseoli pv. phaseoli and Xanthomonas citri pv. fuscans, the causal agents of common bacterial blight in common bean, was investigated. Among the 23 pathogenic Xanthomonas strains used in the study, nine were newly isolated from diseased bean plants, while the remaining strains were obtained from the laboratory culture collection. Based on fatty acid methyl ester (FAME) analysis, the newly isolated strains were identified as X. phaseoli pv. phaseoli and X. citri pv. fuscans. To explore phage-mediated biocontrol potential, phage isolations were performed from soil and wastewater samples collected from Iğdır Province against a total of 23 bacterial strains. Six bacteriophages were confirmed using the double-layer agar method: three (Φ442-FUS, ΦMfb-50-FUS, and ΦMfb-53-FUS) were effective against Xpp strains, while the other three (Φ426-X, ΦMfb-17-X, and ΦMfb-54-X) showed activity against Xcf strains. Notably, the ΦMfb-50, ΦMfb-53, and ΦMfb-54 phage isolates exhibited broad host ranges and strong lytic activities against both pathovars, whereas Φ426-X and Φ442-FUS displayed narrower host spectra. In addition, certain phage isolates demonstrated lytic activity against Xanthomonas euvesicatoria and Erwinia amylovora strains, indicating cross-infective biocontrol potential. Except for the KVN-1 strain, all Acidovorax citrulli strains tested were resistant to the phage isolates. Overall, the findings highlight that environmentally friendly and target-specific phage-based biocontrol strategies could provide a promising alternative for managing common bacterial blight in beans.

Keywords

References

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Details

Primary Language

English

Subjects

Phytopathology

Journal Section

Research Article

Early Pub Date

April 11, 2026

Publication Date

-

Submission Date

November 15, 2025

Acceptance Date

March 3, 2026

Published in Issue

Year 2026 Number: Advanced Online Publication

APA
Sunyar, B., & Dönmez, M. F. (2026). Determination of the Lytic Activity and Host Range of Bacteriophages Isolated Against Xanthomonas phaseoli pv. phaseoli and Xanthomonas citri pv. Fuscans. Kahramanmaraş Sütçü İmam Üniversitesi Tarım Ve Doğa Dergisi, Advanced Online Publication, 1441-1459. https://doi.org/10.18016/ksutarimdoga.vi.1824634


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