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dc.contributor.authorSkaar, Ireneeng
dc.contributor.authorAdaku, Christophereng
dc.contributor.authorJordheim, Monicaeng
dc.contributor.authorByamukama, Roberteng
dc.contributor.authorKiremire, Bernard T.eng
dc.contributor.authorAndersen, Øyvind Meng
dc.date.accessioned2015-03-11T13:42:33Z
dc.date.available2015-03-11T13:42:33Z
dc.date.issued2014-09eng
dc.identifier.issn0031-9422eng
dc.identifier.urihttp://hdl.handle.net/1956/9512
dc.description.abstractThe functional significance of anthocyanin colouration of lower (abaxial) leaf surfaces is not clear. Two anthocyanins, 5-O-methylcyanidin 3-O-(3″-(β-glucuronopyranosyl)-β-glucopyranoside) (1) and 5-O-methylcyanidin 3-O-β-glucopyranoside (2), were isolated from Hemigraphis colorata (Blume) (Acanthaceae) leaves with strong purple abaxial colouration (2.2 and 0.6 mg/g fr. wt., respectively). The glycosyl moiety of 1, the disaccharide 3″-(β-glucuronopyranosyl)-β-glucopyranoside), has previously been reported to occur only in a triterpenoid saponin, lindernioside A. The structural assignment of the aglycone of 1 and 2 is the first complete characterisation of a natural 7-hydroxy-5-methoxyanthocyanidin. Compared to nearly all naturally occurring anthocyanidins, the 5-O-methylation of this anthocyanidin limits the type of possible quinoidal forms of 1 and 2 to be those forms with keto-function in only their 7- and 4′-positions.en_US
dc.language.isoengeng
dc.publisherElseviereng
dc.rightsAttribution-NonCommercial-NoDerivs CC BY-NC-NDeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/eng
dc.subjectHemigraphis colorataeng
dc.subjectAcanthaceaeeng
dc.subjectAbaxial leaf colourationeng
dc.subjectAnthocyaninseng
dc.subject5-O-Methylcyanidineng
dc.subject3″-O-β-Glucuronopyranosyl-β-glucopyranosideeng
dc.subjectQuinoidal formseng
dc.titlePurple anthocyanin colouration on lower (abaxial) leaf surface of Hemigraphis colorata (Acanthaceae)eng
dc.typeJournal articleeng
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400::Kjemi: 440::Miljøkjemi, naturmiljøkjemi: 446nob
dc.subject.nsiVDP::Mathematics and natural scienses: 400::Chemistry: 440::Environmental chemistry, natural environmental chemistry: 446eng
dc.date.updated2015-03-04T09:57:23Zen_US
dc.rights.holderCopyright 2014 The Authors
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng
bora.journalTitlePhytochemistryeng
bibo.volume105eng
bibo.pageStart141eng
bibo.pageEnd146eng
bibo.doihttp://dx.doi.org/10.1016/j.phytochem.2014.05.016eng
bora.accessRightsinfo:eu-repo/semantics/openAccesseng
dc.identifier.cristinID1161761eng
dc.identifier.doi10.1016/j.phytochem.2014.05.016


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