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Effects of a sub-lethal copper exposure on non-green Acer pseudoplatanus cell lipids

2003-05Journal article Open access
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dc.contributor.authorPádua, Mário
dc.contributor.authorAubert, Serge
dc.contributor.authorCasimiro, Adalcina
dc.contributor.authorBligny, Richard
dc.contributor.authorBlock, Maryse A
dc.date.accessioned2018-09-21T13:21:57Z
dc.date.available2018-09-21T13:21:57Z
dc.date.issued2003-05
dc.description.abstractNon-green sycamore cells (Acer pseudoplatanus L.) treated with 50 μM Cu2+ showed a reversible arrest of cell growth after 5 d, indicating that the concentration used was sub-lethal for the cells. Growth arrest was accompanied by hexose and nucleotide-phosphate accumulation and, in contrast with previous reports, no polar-lipid degradation was found. Sub-lethal Cu2+ exposure resulted in an increase in phospholipid amounts, mostly due to an increase of phosphatidylethanolamine. Although the total amount of glycolipids was not significantly changed, Cu2+ exposure changed the relative concentrations of monogalactosyldiacylglycerol (MGDG), digalactosyldiacylglycerol (DGDG) and sulphoquinovosyldiacylglycerol (SQDG). There was a marked increase of DGDG whereas MGDG and SQDG declined. Our results suggest an increase of DGDG synthesis through a pathway similar to the recently described DGD2 pathway and an inhibition of SQDG synthesis. Furthermore, we observed modifications of the fatty acid composition of the plastid synthesized lipids. A significant increase in linoleate (18:2) and a decrease in linolenate (18:3) were found in MGDG, DGDG, SQDG and phosphatidylglycerol (PG), reflecting a deficient desaturation of plastid-located 18:2 fatty acids. In SQDG and PG, Cu2+ treatment also induced a strong enrichment of palmitate (16:0). The effects of Cu2+ on DGDG synthesis and fatty acid desaturation are discussed.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPádua M, Aubert S, Casimiro A, Bligny R, Block MA. Effects of a sub-lethal copper exposure on non-green Acer pseudoplatanus cell lipids. Plant Physiol Biochem. 2003;41(5):471-7.pt_PT
dc.identifier.doi10.1016/S0981-9428(03)00055-Xpt_PT
dc.identifier.urihttp://hdl.handle.net/10400.21/8880
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S098194280300055Xpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectAcer pseudoplatanuspt_PT
dc.subjectCopperpt_PT
dc.subjectMetabolismpt_PT
dc.subjectMembrane lipidspt_PT
dc.subjectSub-lethal stresspt_PT
dc.subjectAcerpt_PT
dc.titleEffects of a sub-lethal copper exposure on non-green Acer pseudoplatanus cell lipidspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage477pt_PT
oaire.citation.issue5pt_PT
oaire.citation.startPage471pt_PT
oaire.citation.titlePlant Physiology and Biochemistrypt_PT
oaire.citation.volume41pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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