Effectiveness of tailocins produced by Pseudomonas fluorescens SF4c in controlling the bacterial-spot disease in tomatoes caused by Xanthomonas vesicatoria

Microbiological Research
Analía PríncipeSonia Fischer

Abstract

The development of alternatives for the use of chemical pesticides for plant disease control is the present-day and ongoing challenge for achieving sustainable agriculture. Pseudomonas fluorescens SF4c, native strain from wheat, produces tailocins (phage-tail-like bacteriocins) with antimicrobial activity against several phytopathogenic strains. We thus investigated the efficacy of foliar application of these bacteriocins to control the bacterial-spot disease in tomato caused by Xanthomonas vesicatoria Xcv Bv5-4a. The disease severity and incidence index were reduced by 44 and 36%, respectively; while the number of viable cells of X. vesicatoria Xcv Bv5-4a decreased after bacteriocin treatment. Furthermore, bacteriocin was effective in reducing bacterial-spot-disease symptoms on tomato fruits even when applied 12 h after infection. Tailocin activity was not affected by abiotic influences such as adjuvant, light and temperature and, biotic factors such as apoplastic-fluids. In contrast, no antibacterial activity of these tailocins was observed when the bacteriocin was exposed to extremely dry conditions. Finally, that no cytotoxic effects on mammalian cells were observed with this representative tailocins is highly significant a...Continue Reading

Citations

Apr 24, 2019·World Journal of Microbiology & Biotechnology·Vítor Rodrigues MarinDaiane Cristina Sass
Nov 30, 2018·Frontiers in Microbiology·Maarten G K GhequireRené De Mot
Oct 13, 2020·Frontiers in Microbiology·William M RooneyDaniel Walker
Nov 1, 2020·Applied Microbiology and Biotechnology·Maria do Carmo de Freire BastosMarcus Lívio Varella Coelho
Nov 8, 2019·Journal of Biotechnology·Maricruz FernandezSonia Fischer
Jan 15, 2021·Comprehensive Reviews in Food Science and Food Safety·Yanlong CuiXin Lü
Feb 3, 2021·Pest Management Science·Ray ChaiDaniel Walker
Sep 3, 2021·Molecular Plant Pathology·Ebrahim OsdaghiGary E Vallad

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