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Vavala E, Passariello C, Pepi F, Colone M, Garzoli S, Ragno R, Pirolli A, Stringaro A, Angiolella L. Antibacterial activity of essential oils mixture against PSA. Nat Prod Res 2015; 30:412-8. [PMID: 25782920 DOI: 10.1080/14786419.2015.1022543] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Pseudomonas syringae pv. actinidiae (PSA) is the causal agent of bacterial canker of kiwifruit. It is very difficult to treat pandemic disease. The prolonged treatment with antibiotics, has resulted in failure and resistance and alternatives to conventional antimicrobial therapy are needed. The aim of our study was to analyse the phenotypic characteristics of PSA, identify new substances from natural source i.e. essential oils (EOs) able to contain the kiwifruit canker and investigate their potential use when utilised in combination. Specially, we investigated the morphological differences of PSA isolates by scanning electron microscope, and the synergic action of different EOs by time-kill and checkerboard methods. Our results demonstrated that PSA was able to produce extracellular polysaccharides when it was isolated from trunk, and, for the first time, that it was possible to kill PSA with a mixture of EOs after 1 h of exposition. We hypothesise on its potential use in agriculture.
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Affiliation(s)
- Elisabetta Vavala
- a Department of Public Health and Infectious Diseases , University of Rome 'Sapienza' , Piazzale Aldo Moro, 5, 00161 Rome , Italy
| | - Claudio Passariello
- a Department of Public Health and Infectious Diseases , University of Rome 'Sapienza' , Piazzale Aldo Moro, 5, 00161 Rome , Italy
| | - Federico Pepi
- b Department of Drugs Chemistry and Technology , University of Rome 'Sapienza' , Piazzale Aldo Moro, 5, 00161 Rome , Italy
| | - Marisa Colone
- c Department of Technology and Health , Italian National Institute of Health , Viale Regina Elena 299, 00161 Rome , Italy
| | - Stefania Garzoli
- b Department of Drugs Chemistry and Technology , University of Rome 'Sapienza' , Piazzale Aldo Moro, 5, 00161 Rome , Italy
| | - Rino Ragno
- d Department of Drugs Chemistry and Technology , Rome Center for Molecular Design, University of Rome 'Sapienza' , Rome , Italy
| | - Adele Pirolli
- d Department of Drugs Chemistry and Technology , Rome Center for Molecular Design, University of Rome 'Sapienza' , Rome , Italy
| | - Annarita Stringaro
- c Department of Technology and Health , Italian National Institute of Health , Viale Regina Elena 299, 00161 Rome , Italy
| | - Letizia Angiolella
- a Department of Public Health and Infectious Diseases , University of Rome 'Sapienza' , Piazzale Aldo Moro, 5, 00161 Rome , Italy
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