Purple anthocyanin colouration on lower (abaxial) leaf surface of Hemigraphis colorata (Acanthaceae)

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dc.contributor.authorSkaar, Irene
dc.contributor.authorAdaku, Christopher
dc.contributor.authorJordheim, Monica
dc.contributor.authorByamukama, Robert
dc.contributor.authorKiremire, Bernard
dc.contributor.authorAndersen, Øyvind M.
dc.date.accessioned2021-12-14T10:51:08Z
dc.date.available2021-12-14T10:51:08Z
dc.date.issued2014
dc.description.abstractThe functional significance of anthocyanin colouration of lower (abaxial) leaf surfaces is not clear. Two anthocyanins, 5-O-methylcyanidin 3-O-(300-(b-glucuronopyranosyl)-b-glucopyranoside) (1) and 5-O-methylcyanidin 3-O-b-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 300-(b-glucuronopyranosyl)-b-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 40-positionsen_US
dc.identifier.citationSkaar, I., Adaku, C., Jordheim, M., Byamukama, R., Kiremire, B., & Andersen, Ø. M. (2014). Purple anthocyanin colouration on lower (abaxial) leaf surface of Hemigraphis colorata (Acanthaceae). Phytochemistry, 105, 141-146.http://dx.doi.org/10.1016/j.phytochem.2014.05.016en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.phytochem.2014.05.016
dc.identifier.urihttps://nru.uncst.go.ug/xmlui/handle/123456789/481
dc.language.isoenen_US
dc.publisherPhytochemistryen_US
dc.subjectHemigraphis colorataen_US
dc.subjectAcanthaceaeen_US
dc.subjectAbaxial leaf colourationen_US
dc.subjectAnthocyaninsen_US
dc.subject5-O-Methylcyanidinen_US
dc.subject3″-O-β-Glucuronopyranosyl-β-glucopyranosideen_US
dc.subjectQuinoidal formsen_US
dc.titlePurple anthocyanin colouration on lower (abaxial) leaf surface of Hemigraphis colorata (Acanthaceae)en_US
dc.typeArticleen_US
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