Defence responses in leaves of resistant and susceptible pepper (Capsicum annuum L.) cultivars infected with different inoculum concentrations of Phytophthora capsici Leon

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dc.authorid0000-0001-6820-0381
dc.contributor.authorKoc, Esra
dc.contributor.authorUstun, Aysen Sulun
dc.contributor.authorIslek, Cemil
dc.contributor.authorArici, Yeliz Kasko
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2011
dc.departmentNiğde ÖHÜ
dc.description.abstractThree pepper cultivars (PM-702: resistant, Demre-8 and KM-hot: susceptible) with different resistances to Phytophthora capsici-22 (P. capsici-22) were inoculated with different concentrations of zoospores to analyze the time course of phenylalanine ammonia lyase (PAL) activity, malondialdehyde (MDA), hydrogen peroxide (H(2)O(2)), praline and total protein. Samples were collected from the leaves of three pepper cultivars on the 2nd, 4th. and 6th days after infection; important differences were observed in PAL activity, MDA amount, H(2)O(2), proline, and total protein with respect to zoospore concentration, infection time, and type of pepper cultivars. Activity of phenylalanine ammonia-lyase (PAL), the first enzyme in the phenylpropanoid biosynthetic pathway, was increased in inoculated leaves of all three cultivars. The increase in production of PAL upon challenge was higher in the infected plants compared to the non-infected (control) plants. An early induction of PAL was observed in the leaves of all peppers infected with P. capsici within two days, making it one of the detected earlier responses to infection. Moreover, pathogen stress increased the rate of lipid peroxidation (which is indicated by increasing MDA content). Production of reactive oxygen species, H(2)O(2), and lipid peroxidation increased in pepper leaves by increasing time of infection and inoculum concentration. The findings suggested that PM-702 pepper cultivar was inherently better protected against lipid peroxidation under P. capsici stress than KM-hot and Demre-8. In addition, it was observed that proline content in the leaves of infected susceptible cultivars increased with time, but highest proline and total protein in non-infected (control) leaves were recorded in resistant cultivar. (C) 2011 Elsevier B.V. All rights reserved.
dc.identifier.doi10.1016/j.scienta.2011.02.008
dc.identifier.endpage442
dc.identifier.issn0304-4238
dc.identifier.issue4
dc.identifier.scopus2-s2.0-79953315330
dc.identifier.scopusqualityQ1
dc.identifier.startpage434
dc.identifier.urihttps://dx.doi.org/10.1016/j.scienta.2011.02.008
dc.identifier.urihttps://hdl.handle.net/11480/4725
dc.identifier.volume128
dc.identifier.wosWOS:000290815300009
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofSCIENTIA HORTICULTURAE
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectPAL
dc.subjectLipid peroxidation
dc.subjectH(2)O(2)
dc.subjectProline
dc.subjectTotal protein
dc.titleDefence responses in leaves of resistant and susceptible pepper (Capsicum annuum L.) cultivars infected with different inoculum concentrations of Phytophthora capsici Leon
dc.typeArticle

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