Apoplastic anti-oxidants in pepper (Capsicum annuum L.) fruit and their relationship to blossom-end rot

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dc.contributor.authorTurhan, E.
dc.contributor.authorKarni, L.
dc.contributor.authorAktas, H.
dc.contributor.authorDeventurero, G.
dc.contributor.authorChang, D.C.
dc.contributor.authorBar-Tal, A.
dc.contributor.authorAloni, B.
dc.date.accessioned2025-01-27T18:55:59Z
dc.date.available2025-01-27T18:55:59Z
dc.date.issued2006
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe aim of the present research was to study changes in the major anti-oxidative enzyme activities known to be associated with the apoplast, during the induction of blossom-end rot (BER) in bell pepper (Capsicum annuum L.) fruits grown under saline conditions. Pepper plants of the BER-sensitive cv. 'Mazurka' and less-sensitive cv. 'Selica' were grown under control, low- and high-salinity irrigation regimes. Fruits were harvested continuously and, after approx. 7 months under these conditions, BER symptoms started to appear (in the Spring season) and fruits were sampled for biochemical measurements. The intercellular washing fluid (IWF; apoplast fraction) of the fruit pericarp was prepared and enzyme activities in that fraction were determined. The results showed that production of reactive oxygen species (ROS) in the fruit apoplast was higher in 'Mazurka' than in 'Selica'. Apoplastic peroxidase and superoxide dismutase (SOD) activities, and the concentration of ascorbic acid, increased during 'Selica' fruit development, whereas the concentration of H 2O2 decreased. During the stage of rapid growth, when fruits are most susceptible to BER, apoplastic peroxidase activity was greatly enhanced in the healthy pericarp of BER-affected fruits compared to healthy fruits. Under saline conditions, apoplastic peroxidase and SOD activities, as well as ascorbic acid and H2O2 levels, increased in healthy fruits of the resistant cultivar 'Selica'; whereas, in healthy fruit of the BER-sensitive cultivar 'Mazurka', apoplastic peroxidase activity decreased while the level of ascorbic acid increased, but to a much lesser extent than in 'Selica'. SOD activity and H2O2 levels increased similarly in both cultivars with increasing levels of salinity. It is proposed that apoplast-associated peroxidase activity and ascorbic acid concentration are increased coordinately in response to salt stress and may be part of a protective anti-oxidation mechanism that determines cultivar sensitivity to BER.
dc.identifier.doi10.1080/14620316.2006.11512121
dc.identifier.endpage667
dc.identifier.issn1462-0316
dc.identifier.issue4
dc.identifier.scopus2-s2.0-33746450109
dc.identifier.scopusqualityQ1
dc.identifier.startpage661
dc.identifier.urihttps://doi.org/10.1080/14620316.2006.11512121
dc.identifier.urihttps://hdl.handle.net/20.500.12428/12802
dc.identifier.volume81
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherHeadley Brothers Ltd
dc.relation.ispartofJournal of Horticultural Science and Biotechnology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_Scopus_20250125
dc.subjectCapsicum annuum
dc.titleApoplastic anti-oxidants in pepper (Capsicum annuum L.) fruit and their relationship to blossom-end rot
dc.typeArticle

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