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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Bactericidal Effect of Entomopathogenic BacteriumPseudomonas entomophilaAgainstXanthomonas citriReduces Citrus Canker Disease Severity

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Author(s):
Villamizar, Sonia [1] ; Ferro, Jesus Aparecido [1] ; Caicedo, Juan Carlos [1, 2] ; Alves, L. M. C. [1]
Total Authors: 4
Affiliation:
[1] Sao Paulo State Univ UNESP, Sch Agr & Vet Sci, Post Grad Program Agr & Livestock Microbiol, Jaboticabal - Brazil
[2] Univ Santander UDES, Res Grp CIBAS, Fac Exact Nat & Agr Sci, Bucaramanga - Colombia
Total Affiliations: 2
Document type: Journal article
Source: FRONTIERS IN MICROBIOLOGY; v. 11, JUN 24 2020.
Web of Science Citations: 0
Abstract

The bacteriumPseudomonas entomophilahas been recognized as an exceptional species within thePseudomonasgenus, capable of naturally infecting and killing insects from at least three different orders.P. entomophilaingestion leads to irreversible gut damage resulting from a global blockage of translation, which impairs both immune and tissue repair systems in the insect intestine. In this study we isolated aP. entomophilabacterial strain from soil samples which displayed a strong activity againstXanthomonas citrisubsp,citri(Xcc), the etiological agent of citrus canker disease. The antagonism potential of isolated bacteria againstXccand its ability to reduce citrus canker severity was assessed bothex plantaandin planta. Our findings show that pathogenicity assays inCitrus x limoniaby pressure infiltration and spray with a mixture ofP. entomophilaandXccleaded to a significant reduction in the number of canker lesions in high susceptible citrus leaves, at 21 days post-infection. To the best of our knowledge this is the first report of antibacterial activity ofP. entomophilaagainst a phytopathogenic bacterium. Collective action ofP. entomophilafactors such as diketopiperazine production and the type 6 secretion system (T6SS) may be involved in this type of biological control of citrus canker. The results suggest that theP. entomophilastrain could be a promising biocontrol agent acting directly againstXcc. (AU)

FAPESP's process: 15/22473-3 - IDENTIFICATION OF ALTERNATIVE SENSOR(S) FOR DSF AUTOINDUCER, PATHOGENICITY REGULATOR IN Xanthomonas citri subsp. citri
Grantee:Juan Carlos Caicedo Cepeda
Support type: Scholarships in Brazil - Post-Doctorate