dc.contributor.author | Skaar, Irene | eng |
dc.contributor.author | Adaku, Christopher | eng |
dc.contributor.author | Jordheim, Monica | eng |
dc.contributor.author | Byamukama, Robert | eng |
dc.contributor.author | Kiremire, Bernard T. | eng |
dc.contributor.author | Andersen, Øyvind M | eng |
dc.date.accessioned | 2015-03-11T13:42:33Z | |
dc.date.available | 2015-03-11T13:42:33Z | |
dc.date.issued | 2014-09 | eng |
dc.identifier.issn | 0031-9422 | en_US |
dc.identifier.uri | https://hdl.handle.net/1956/9512 | |
dc.description.abstract | The 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.iso | eng | eng |
dc.publisher | Elsevier | en_US |
dc.rights | Attribution-NonCommercial-NoDerivs CC BY-NC-ND | eng |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/ | eng |
dc.subject | Hemigraphis colorata | eng |
dc.subject | Acanthaceae | eng |
dc.subject | Abaxial leaf colouration | eng |
dc.subject | Anthocyanins | eng |
dc.subject | 5-O-Methylcyanidin | eng |
dc.subject | 3″-O-β-Glucuronopyranosyl-β-glucopyranoside | eng |
dc.subject | Quinoidal forms | eng |
dc.title | Purple anthocyanin colouration on lower (abaxial) leaf surface of Hemigraphis colorata (Acanthaceae) | en_US |
dc.type | Peer reviewed | |
dc.type | Journal article | |
dc.date.updated | 2015-03-04T09:57:23Z | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright 2014 The Authors | en_US |
dc.identifier.doi | https://doi.org/10.1016/j.phytochem.2014.05.016 | |
dc.identifier.cristin | 1161761 | |
dc.source.journal | Phytochemistry | |
dc.source.40 | 105 | |
dc.source.pagenumber | 141-146 | |
dc.subject.nsi | VDP::Mathematics and natural scienses: 400::Chemistry: 440::Environmental chemistry, natural environmental chemistry: 446 | en_US |
dc.subject.nsi | VDP::Matematikk og naturvitenskap: 400::Kjemi: 440::Miljøkjemi, naturmiljøkjemi: 446 | nob |