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Πεδίο DCΤιμήΓλώσσα
dc.contributor.authorGeorgiadou, Egli C.-
dc.contributor.authorGoulas, Vlasios-
dc.contributor.authorNtourou, Thessaloniki-
dc.contributor.authorManganaris, George A.-
dc.contributor.authorKalaitzis, Panagiotis-
dc.contributor.authorFotopoulos, Vasileios-
dc.contributor.otherΓούλας, Βλάσιος-
dc.contributor.otherΜαγγανάρης, Γιώργος-
dc.contributor.otherΦωτόπουλος, Βασίλειος-
dc.date.accessioned2017-01-19T12:39:32Z-
dc.date.available2017-01-19T12:39:32Z-
dc.date.issued2016-11-16-
dc.identifier.citationFrontiers in Plant Science, 2016, vol. 7en_US
dc.identifier.issn1664462X-
dc.identifier.urihttps://hdl.handle.net/20.500.14279/9159-
dc.description.abstractThe term vitamin E refers to a group of eight lipophilic compounds known as tocochromanols. The tocochromanols are divided into two groups,that is,tocopherols and tocotrienols,with four forms each,namely α-,β-,γ-,and δ-. In order to explore the temporal biosynthesis of tocochromanols in olive (Olea europaea cv. ‘Koroneiki’) fruit during on-tree development and ripening over successive growing years,a combined array of analytical,molecular,bioinformatic,immunoblotting,and antioxidant techniques were employed. Fruits were harvested at eight successive developmental stages [10–30 weeks after flowering (WAF)],over three consecutive years. Intriguingly,climatic conditions affected relative transcription levels of vitamin E biosynthetic enzymes; a general suppression to induction pattern (excluding VTE5) was monitored moving from the 1st to the 3rd growing year,probably correlated to decreasing rainfall levels and higher temperature,particularly at the fruit ripening stage. A gradual diminution of VTE5 protein content was detected during the fruit development of each year,with a marked decrease occurring after 16 WAF. Alpha-tocopherol was the most abundant metabolite with an average percentage of 96.82 ± 0.23%,91.13 ± 0.95%,and 88.53 ± 0.96% (during the 1st ,2nd ,and 3rd year,respectively) of total vitamin E content in 10–30 WAF. The concentrations of α-tocopherol revealed a generally declining pattern,both during the on-tree ripening of the olive fruit and across the 3 years,accompanied by a parallel decline of the total antioxidant capacity of the drupe. Contrarily,all other tocochromanols demonstrated an inverse pattern with lowest levels being recorded during the 1st year. It is likely that,in a defense attempt against water deficit conditions and increased air temperature,transcription of genes involved in vitamin E biosynthesis (excluding VTE5) is up-regulated in olive fruit,probably leading to the blocking/deactivating of the pathway through a negative feedback regulatory mechanism.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.relation.ispartofFrontiers in Plant Scienceen_US
dc.rights© Frontiers Mediaen_US
dc.subjectVTE5en_US
dc.subjectWestern bloten_US
dc.subjectAntioxidant capacityen_US
dc.subjectRelative transcription levelsen_US
dc.subjectTocopherolsen_US
dc.subjectVitamin E.en_US
dc.titleRegulation of on-tree vitamin E biosynthesis in olive fruit during successive growing years: The impact of fruit development and environmental cuesen_US
dc.typeArticleen_US
dc.doi10.3389/fpls.2016.01656en_US
dc.collaborationCyprus University of Technologyen_US
dc.collaborationMediterranean Agronomic Institute Chaniaen_US
dc.subject.categoryAgricultural Biotechnologyen_US
dc.journalsOpen Accessen_US
dc.countryCyprusen_US
dc.countryGreeceen_US
dc.subject.fieldAgricultural Sciencesen_US
dc.publicationPeer Revieweden_US
dc.identifier.doi10.3389/fpls.2016.01656en_US
dc.relation.volume7en_US
cut.common.academicyear2016-2017en_US
item.fulltextWith Fulltext-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.cerifentitytypePublications-
item.openairetypearticle-
crisitem.journal.journalissn1664-462X-
crisitem.journal.publisherFrontiers-
crisitem.author.deptDepartment of Agricultural Sciences, Biotechnology and Food Science-
crisitem.author.deptDepartment of Agricultural Sciences, Biotechnology and Food Science-
crisitem.author.deptDepartment of Agricultural Sciences, Biotechnology and Food Science-
crisitem.author.deptDepartment of Agricultural Sciences, Biotechnology and Food Science-
crisitem.author.facultyFaculty of Geotechnical Sciences and Environmental Management-
crisitem.author.facultyFaculty of Geotechnical Sciences and Environmental Management-
crisitem.author.facultyFaculty of Geotechnical Sciences and Environmental Management-
crisitem.author.facultyFaculty of Geotechnical Sciences and Environmental Management-
crisitem.author.orcid0000-0002-5073-979X-
crisitem.author.orcid0000-0001-7527-1559-
crisitem.author.orcid0000-0002-5849-6104-
crisitem.author.orcid0000-0003-1205-2070-
crisitem.author.parentorgFaculty of Geotechnical Sciences and Environmental Management-
crisitem.author.parentorgFaculty of Geotechnical Sciences and Environmental Management-
crisitem.author.parentorgFaculty of Geotechnical Sciences and Environmental Management-
crisitem.author.parentorgFaculty of Geotechnical Sciences and Environmental Management-
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