Exogenous pipecolic acid modulates plant defence responses against Podosphaera xanthii and Pseudomonas syringae pv. lachrymans in cucumber (Cucumis sativus L.)

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dc.contributor.authorPazarlar, S.
dc.contributor.authorSanver, U.
dc.contributor.authorCetinkaya, N.
dc.date.accessioned2021-05-03T20:27:44Z
dc.date.available2021-05-03T20:27:44Z
dc.date.issued2021
dc.departmentEge Üniversitesien_US
dc.description.abstractSystemic acquired resistance (SAR) is a long-lasting and broad-based resistance that can be activated following infection with (a)virulent pathogens and treatment with exogenous elicitors. Pipecolic acid (Pip), a Lys-derived non-protein amino acid, naturally occurs in many different plant species, and its N-hydroxylated derivative, N-hydroxypipecolic acid (NHP), acts as a crucial regulator of SAR. in the present study, we conducted a systemic analysis of the defence responses of a series of D,L-Pip-pretreated Cucumis sativus L. against Podosphaera xanthii (P. xanthii) and Pseudomonas syringae pv. lachrymans (Psl). The effects of D,L-Pip on ROS metabolism, defence-related gene expression, SA accumulation and activity of defence-related enzymes were evaluated. We show that exogenously applied D,L-Pip successfully induces SAR in cucumber against P. xanthii and Psl, but not Fusarium oxysporum f. sp. cucumerinum (Foc). Exogenous application of D,L-Pip via the root system is sufficient to activate the accumulation of free and conjugated salicylic acid (SA), and earlier and stronger upregulation of SAR-associated gene transcription upon P. xanthii infection. Furthermore, D,L-Pip treatment and subsequent pathogen inoculation promote hydrogen peroxide and superoxide accumulation, as well as Rboh transcription activation in cucumber plants, suggesting that D,L-Pip-triggered ROS production might be involved in enhanced defence reactions against P. xanthii. We also demonstrate that D,L-Pip pretreatment increases the activity of defence-associated enzymes, including peroxidase, chitinase and beta-1,3-glucanase. The results presented in this report provide promising features of Pip as an elicitor in cucumber and call for further studies that may uncover its potential in production areas against different phytopathogens.en_US
dc.identifier.doi10.1111/plb.13243en_US
dc.identifier.endpage484en_US
dc.identifier.issn1435-8603
dc.identifier.issn1438-8677
dc.identifier.issue3en_US
dc.identifier.pmid33547740en_US
dc.identifier.scopus2-s2.0-85101586365en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage473en_US
dc.identifier.urihttps://doi.org/10.1111/plb.13243
dc.identifier.urihttps://hdl.handle.net/11454/69634
dc.identifier.volume23en_US
dc.identifier.wosWOS:000621218500001en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.relation.ispartofPlant Biologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCucumberen_US
dc.subjectPipecolic aciden_US
dc.subjectPodosphaera xanthiien_US
dc.subjectPseudomonas syringae pven_US
dc.subjectlachrymansen_US
dc.subjectROSen_US
dc.subjectsystemic acquired resistanceen_US
dc.titleExogenous pipecolic acid modulates plant defence responses against Podosphaera xanthii and Pseudomonas syringae pv. lachrymans in cucumber (Cucumis sativus L.)en_US
dc.typeArticleen_US

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