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Antimicrobial potential of six plant essential oils against Pseudomonas syringae pv. actinidiae: in vitro activity and in planta efficacy do not always align

2025-12-17Artigo de investigação Acesso aberto
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dc.contributor.authorSilva, Marta Nunes da
dc.contributor.authorSantos, Miguel G.
dc.contributor.authorVasconcelos, Marta W.
dc.contributor.authorCarvalho, Susana M. P.
dc.date.accessioned2026-01-13T11:14:55Z
dc.date.available2026-01-13T11:14:55Z
dc.date.issued2025-12-17
dc.description.abstractPlant essential oils (EOs) are attracting interest as ecofriendly alternatives to antibiotics and copper-based control of kiwifruit bacterial canker (KBC), caused by Pseudomonas syringae pv. actinidiae (Psa). This study chemically profiled six EOs (anise, basil, cardamom, cumin, fennel, and laurel) and evaluated their antimicrobial activity both in vitro and in planta. The in vitro assay targeted four strains, two of Psa and two of the low-virulent P. syringae pv. actinidifoliorum (Pfm), whereas the in planta assay focused on the highly virulent Psa7286 strain, assessed under preventive and curative application regimes (i.e., 14 days pre- or post-inoculation, respectively). Cumin, with cuminaldehyde as its major component (48%), was the most effective EO in vitro, significantly inhibiting growth at 5–10% concentration, whereas anise, rich in anethole (89%), was consistently the least effective one. However, the in planta application of the EOs produced antimicrobial effects that differed markedly from in vitro results and showed strong dependence on the timing of application. Preventive treatment significantly reduced Psa endophytic populations in basil (70%), anise (54%), laurel (42%), and cumin (35%) compared to untreated plants. In contrast, when the EOs were applied post-inoculation (curative treatment), a significant decrease in Psa colonization was observed in laurel (81%), cardamon (70%), cumin (31%) and fennel (29%). Although plant EOs are gaining momentum in the control of Psa and other diseases, translation from in vitro to in planta efficacy is not direct and is strongly timing-dependent, which underscores the need to perform validation trials in planta and to fine-tune application schedules for the integrated management of KBC.eng
dc.identifier.citationSilva, M. N. D., Santos, M. G., Vasconcelos, M. W., & Carvalho, S. M. P. (2025). Antimicrobial potential of six plant essential oils against pseudomonas syringae pv. actinidiae: in vitro activity and in planta efficacy do not always align. Plants, 14(24), Article 3825. https://doi.org/10.3390/ plants14243825
dc.identifier.doi10.3390/ plants14243825
dc.identifier.eid105025811132
dc.identifier.issn2223-7747
dc.identifier.otherc6e10466-3a98-419f-92a5-f1fa054f7eb6
dc.identifier.pmcPMC12737121
dc.identifier.pmid41470706
dc.identifier.urihttp://hdl.handle.net/10400.14/56511
dc.identifier.wos001646558100001
dc.language.isoeng
dc.peerreviewedyes
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAntimicrobial activity
dc.subjectCrop protection
dc.subjectKiwifruit bacterial canker
dc.subjectPseudomonas syringae pv. actinidifoliorum
dc.titleAntimicrobial potential of six plant essential oils against Pseudomonas syringae pv. actinidiae: in vitro activity and in planta efficacy do not always aligneng
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.issue24
oaire.citation.titlePlants
oaire.citation.volume14
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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