Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/3207
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Fotopoulos, Vasileios | - |
dc.contributor.author | Kanellis, Angelos K. | - |
dc.date.accessioned | 2015-05-15T05:58:14Z | - |
dc.date.accessioned | 2015-12-02T14:27:55Z | - |
dc.date.available | 2015-05-15T05:58:14Z | - |
dc.date.available | 2015-12-02T14:27:55Z | - |
dc.date.issued | 2013-12 | - |
dc.identifier.citation | Plant Physiology and Biochemistry,2013, vol. 73, pp. 154-160 | en_US |
dc.identifier.issn | 09819428 | - |
dc.identifier.uri | https://hdl.handle.net/20.500.14279/3207 | - |
dc.description.abstract | Ascorbate oxidase (AO) is an apoplastic enzyme that uses oxygen to catalyse the oxidation of ascorbate (AA) to dehydroascorbate (DHA) via the unstable radical monodehydroascorbate (MDHA). Here, we report that transgenic tobacco plants (Nicotiana tabacum L. cv. Xanthi) with an in vivo lowered apoplastic AA redox state through increased AO expression demonstrate signs of delayed dark-induced senescence compared with wild-type plants, as shown by chlorophyll loss assay. In situ localization of hydrogen peroxide (H2O2) suggests that, although transgenic plants have higher constitutive levels of H2O2 under normal growth conditions, imposed dark-induced senescence results in smaller induction levels of H2O2, an observation which correlates with increased antioxidant enzyme activities and an induction in the expression of AA recycling genes compared with that in wild-type plants. Our current findings, combined with previous studies which showed the contribution of AO in the regulation of AA redox state, suggest that the reduction in AA redox state in the leaf apoplast of these transgenic plants results in an increase in the endogenous levels of H2O2, which provides a form of ‘acquired tolerance’ to oxidative stress imposed by dark-induced senescence. | en_US |
dc.format | en_US | |
dc.language.iso | en | en_US |
dc.relation.ispartof | Plant Physiology and Biochemistry | en_US |
dc.rights | © Elsevier | en_US |
dc.subject | Oxidative stress | en_US |
dc.subject | Senescence | en_US |
dc.subject | Ascorbate oxidase | en_US |
dc.subject | Transgenic plants | en_US |
dc.subject | Hydrogen peroxide | en_US |
dc.title | Altered apoplastic ascorbate redox state in tobacco plants via ascorbate oxidase overexpression results in delayed dark-induced senescence in detached leaves | en_US |
dc.type | Article | en_US |
dc.collaboration | Cyprus University of Technology | en_US |
dc.collaboration | Aristotle University of Thessaloniki | en_US |
dc.subject.category | Biological Sciences | en_US |
dc.journals | Open Access | en_US |
dc.review | Peer Reviewed | en |
dc.country | Cyprus | en_US |
dc.country | Greece | en_US |
dc.subject.field | Natural Sciences | en_US |
dc.publication | Peer Reviewed | en_US |
dc.identifier.doi | 10.1016/j.plaphy.2013.09.002 | en_US |
dc.dept.handle | 123456789/70 | en |
dc.relation.volume | 73 | en_US |
cut.common.academicyear | 2013-2014 | en_US |
dc.identifier.spage | 154 | en_US |
dc.identifier.epage | 160 | en_US |
item.fulltext | No Fulltext | - |
item.languageiso639-1 | en | - |
item.grantfulltext | none | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
crisitem.journal.journalissn | 0981-9428 | - |
crisitem.journal.publisher | Elsevier | - |
crisitem.author.dept | Department of Agricultural Sciences, Biotechnology and Food Science | - |
crisitem.author.faculty | Faculty of Geotechnical Sciences and Environmental Management | - |
crisitem.author.orcid | 0000-0003-1205-2070 | - |
crisitem.author.parentorg | Faculty of Geotechnical Sciences and Environmental Management | - |
Appears in Collections: | Άρθρα/Articles |
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