ORIGINAL ARTICLE
Prospecting of pathogen-derived elicitors for the control of tomato bacterial spot
 
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1
Agronomia (Proteção de Plantas), Universidade Estadual Paulita "Júlio de Mesquita Filho"- Faculdade de Ciências Agronômicas, Brazil
2
Agronomia (Proteção de Plantas), Universidade Estadual Paulista "Júlio de Mesquita Filho"- Faculdade de Ciências Agronômicas, Brazil
3
Fitopatologia, Embrapa Meio Ambiente, Brazil
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
CORRESPONDING AUTHOR
Camila Tonelotti Simões   

Agronomia (Proteção de Plantas), Universidade Estadual Paulita "Júlio de Mesquita Filho"- Faculdade de Ciências Agronômicas, Av. Universitária, 3780, Altos do Paraíso, 18610034, Botucatu, Brazil
Submission date: 2020-10-24
Acceptance date: 2021-01-22
Online publication date: 2021-02-16
 
 
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ABSTRACT
Plants can recognize molecules derived from pathogens and trigger systemic acquired resistance (SAR). In phytopathogenic bacteria, elicitors are constituent components of cellular structures, such as flagellin. We sought to select structural components of Xanthomonas spp. incompatible with tomato, aiming to control bacterial spot (Xanthomonas perforans). Initially, cell suspensions from 11 Xanthomonas spp. isolates were infiltrated into the leaves to assess their ability to cause a hypersensitivity reaction (HR) and the incompatible ones had their flagellin purified. The flagellin of the isolates were first applied at different concentrations, via infiltration and spraying. The pathogen, X. perforans, was inoculated after 24 h, to assess whether there would be any harmful reaction. No harmfuil reaction was observed in any treatment. Then, a second experiment was conducted to assess the severity of all isolates, at a concentration of 8.35 μg mL-1 (1D), via spraying, infiltration, and soil. The greatest reduction in ACCPD was observed in the treatment with XapRR, applied via spraying. Thus, prospecting for elicitors is the first step in developing a product for agricultural use. The flagellin elicitor of XapRR is promising and capable of producing these molecules on a large scale.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
eISSN:1899-007X
ISSN:1427-4345