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Essential Oils and Hydrolates: Potential Tools for Defense against Bacterial Plant Pathogens

The essential oils (EOs) of Origanum compactum and Satureja montana chemotyped (CT) at carvacrol, two Thymus vulgaris CT at thujanol and thymol, and Hydrolates (Hys) of S. montana and Citrus aurantium var. amara were chosen for studying their bactericidal efficacy against few phytobacterial pathogen...

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Autores principales: Proto, Maria Rita, Biondi, Enrico, Baldo, David, Levoni, Matilde, Filippini, Gianfranco, Modesto, Monica, Di Vito, Maura, Bugli, Francesca, Ratti, Claudio, Minardi, Paola, Mattarelli, Paola
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9031397/
https://www.ncbi.nlm.nih.gov/pubmed/35456755
http://dx.doi.org/10.3390/microorganisms10040702
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author Proto, Maria Rita
Biondi, Enrico
Baldo, David
Levoni, Matilde
Filippini, Gianfranco
Modesto, Monica
Di Vito, Maura
Bugli, Francesca
Ratti, Claudio
Minardi, Paola
Mattarelli, Paola
author_facet Proto, Maria Rita
Biondi, Enrico
Baldo, David
Levoni, Matilde
Filippini, Gianfranco
Modesto, Monica
Di Vito, Maura
Bugli, Francesca
Ratti, Claudio
Minardi, Paola
Mattarelli, Paola
author_sort Proto, Maria Rita
collection PubMed
description The essential oils (EOs) of Origanum compactum and Satureja montana chemotyped (CT) at carvacrol, two Thymus vulgaris CT at thujanol and thymol, and Hydrolates (Hys) of S. montana and Citrus aurantium var. amara were chosen for studying their bactericidal efficacy against few phytobacterial pathogens. The Minimal Inhibitory Concentration (MIC) and Bactericidal Concentration (MBC) were found by microdilution assay. The essential oils of O. compactum (MBC 0.06% v/v), T. vulgaris CT thymol (MBC 0.06% v/v), and Hy of C. aurantium (MBC 6.25% v/v) resulted in being the most effective against Erwinia amylovora; thus, they were used as starting concentrations for ex vivo assays. Despite the great in vitro effectiveness, the disease incidence and the population dynamic ex vivo assays showed no significant results. On the other hand, EO of O. compactum and Hy of C. aurantium (at 0.03% and 4.5% v/v, respectively) showed resistance induction in tomato plants against Xanthomonas vesicatoria infections; both treatments resulted in approximately 50% protection. In conclusion, EOs and Hys could be promising tools for agricultural defense, but further studies will be necessary to stabilize the EOs emulsions, while Hys application could be an effective method to prevent bacterial diseases when used as resistance inducer by pre-transplantation treatment at roots.
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spelling pubmed-90313972022-04-23 Essential Oils and Hydrolates: Potential Tools for Defense against Bacterial Plant Pathogens Proto, Maria Rita Biondi, Enrico Baldo, David Levoni, Matilde Filippini, Gianfranco Modesto, Monica Di Vito, Maura Bugli, Francesca Ratti, Claudio Minardi, Paola Mattarelli, Paola Microorganisms Article The essential oils (EOs) of Origanum compactum and Satureja montana chemotyped (CT) at carvacrol, two Thymus vulgaris CT at thujanol and thymol, and Hydrolates (Hys) of S. montana and Citrus aurantium var. amara were chosen for studying their bactericidal efficacy against few phytobacterial pathogens. The Minimal Inhibitory Concentration (MIC) and Bactericidal Concentration (MBC) were found by microdilution assay. The essential oils of O. compactum (MBC 0.06% v/v), T. vulgaris CT thymol (MBC 0.06% v/v), and Hy of C. aurantium (MBC 6.25% v/v) resulted in being the most effective against Erwinia amylovora; thus, they were used as starting concentrations for ex vivo assays. Despite the great in vitro effectiveness, the disease incidence and the population dynamic ex vivo assays showed no significant results. On the other hand, EO of O. compactum and Hy of C. aurantium (at 0.03% and 4.5% v/v, respectively) showed resistance induction in tomato plants against Xanthomonas vesicatoria infections; both treatments resulted in approximately 50% protection. In conclusion, EOs and Hys could be promising tools for agricultural defense, but further studies will be necessary to stabilize the EOs emulsions, while Hys application could be an effective method to prevent bacterial diseases when used as resistance inducer by pre-transplantation treatment at roots. MDPI 2022-03-24 /pmc/articles/PMC9031397/ /pubmed/35456755 http://dx.doi.org/10.3390/microorganisms10040702 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Proto, Maria Rita
Biondi, Enrico
Baldo, David
Levoni, Matilde
Filippini, Gianfranco
Modesto, Monica
Di Vito, Maura
Bugli, Francesca
Ratti, Claudio
Minardi, Paola
Mattarelli, Paola
Essential Oils and Hydrolates: Potential Tools for Defense against Bacterial Plant Pathogens
title Essential Oils and Hydrolates: Potential Tools for Defense against Bacterial Plant Pathogens
title_full Essential Oils and Hydrolates: Potential Tools for Defense against Bacterial Plant Pathogens
title_fullStr Essential Oils and Hydrolates: Potential Tools for Defense against Bacterial Plant Pathogens
title_full_unstemmed Essential Oils and Hydrolates: Potential Tools for Defense against Bacterial Plant Pathogens
title_short Essential Oils and Hydrolates: Potential Tools for Defense against Bacterial Plant Pathogens
title_sort essential oils and hydrolates: potential tools for defense against bacterial plant pathogens
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9031397/
https://www.ncbi.nlm.nih.gov/pubmed/35456755
http://dx.doi.org/10.3390/microorganisms10040702
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