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dc.creatorVidović, Marija
dc.creatorMorina, Filis
dc.creatorMilic, Sonja
dc.creatorAlbert, Andreas
dc.creatorZechmann, Bernd
dc.creatorTosti, Tomislav
dc.creatorWinkler, Jana Barbro
dc.creatorVeljović-Jovanović, Sonja
dc.date.accessioned2018-11-22T00:31:45Z
dc.date.available2018-11-22T00:31:45Z
dc.date.issued2015
dc.identifier.issn0981-9428
dc.identifier.urihttps://cherry.chem.bg.ac.rs/handle/123456789/1727
dc.description.abstractWe studied the specific effects of high photosynthetically active radiation (PAR, 400-700 nm) and ecologically relevant UV-B radiation (0.90 W m(-2)) on antioxidative and phenolic metabolism by exploiting the green-white leaf variegation of Pelargonium zonale plants. This is a suitable model system for examining "source-sink" interactions within the same leaf. High PAR intensity (1350 mu mol m(-2) s(-1)) and UV-B radiation induced different responses in green and white leaf sectors. High PAR intensity had a greater influence on green tissue, triggering the accumulation of phenylpropanoids and flavonoids with strong antioxidative function. Induced phenolics, together with ascorbate, ascorbate peroxidase (APX, EC 1.11.1.11) and catalase (CAT, EC 1.11.1.6) provided efficient defense against potential oxidative pressure. UV-B-induced up-regulation of non-phenolic H2O2 scavengers in green leaf sectors was greater than high PAR-induced changes, indicating a UV-B role in antioxidative defense under light excess; on the contrary, minimal effects were observed in white tissue. However, UV-B radiation had greater influence on phenolics in white leaf sections compared to green ones, inducing accumulation of phenolic glycosides whose function was UV-B screening rather than antioxidative. By stimulation of starch and sucrose breakdown and carbon allocation in the form of soluble sugars from "source" (green) tissue to "sink" (white) tissue, UV-B radiation compensated the absence of photosynthetic activity and phenylpropanoid and flavonoid biosynthesis in white sectors. (C) 2015 Elsevier Masson SAS. All rights reserved.en
dc.publisherElsevier France-Editions Scientifiques Medicales Elsevier, Paris
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43010/RS//
dc.rightsrestrictedAccess
dc.sourcePlant Physiology and Biochemistry
dc.subjectAnthocyaninsen
dc.subjectAntioxidative enzymesen
dc.subjectHigh light intensityen
dc.subjectFlavonoidsen
dc.subjectSugar distributionen
dc.subjectUV-B radiationen
dc.subjectVariegationen
dc.titleCarbon allocation from source to sink leaf tissue in relation to flavonoid biosynthesis in variegated Pelargonium zonale under UV-B radiation and high PAR intensityen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractЗецхманн, Бернд; Тости, Томислав Б.; Wинклер, Јана Барбро; Aлберт, Aндреас; Морина, Филис; Видовиц, Марија; Милиц, Соња; Јовановиц, Соња Вељовиц;
dc.citation.volume93
dc.citation.spage44
dc.citation.epage55
dc.identifier.wos000357223100007
dc.identifier.doi10.1016/j.plaphy.2015.01.008
dc.citation.other93: 44-55
dc.citation.rankM21
dc.identifier.pmid25661975
dc.type.versionpublishedVersionen
dc.identifier.scopus2-s2.0-84937816981
dc.identifier.rcubKon_2873


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