title: Betacyanins and phenolic compounds from Amaranthus spinosus L. and Boerhavia erecta L.
abstract: Stem bark extracts of Boerhavia erecta L. (erect spiderling) and Amaranthus spinosus L. (spiny amaranth), two wild growing weed plants used in traditional African medicine, were characterized with respect to their phenolic profile including the betalains. While the main betalains in A. spinosus were identified as amaranthine and isoamaranthine, the major betacyanins in B. erecta were betanin, isobetanin together with neobetanin. The latter showed higher betalain concentrations amounting to 186 mg/100 g, while the former contained 24 mg betacyanins in 100 g of the ground plant material. Extracts of A. spinosus were found to contain hydroxycinnamates, quercetin and kaempferol glycosides, whereas catechins, procyanidins and quercetin, kaempferol and isorhamnetin glycosides were detected in B. erecta. The amounts of these compounds ranged from 305 mg/100 g for A. spinosus to 329 mg/100 g for B. erecta.
authors.affiliation: Institute of Food Technology, Section Plant Foodstuff Technology, Hohenheim University, Garbenstrasse 25, 70599 Stuttgart, Germany. stintzin@uni-hohenheim.de
authors.forename: Florian C
authors.initials: FC
authors.lastname: Stintzing
authors.forename: Dietmar
authors.initials: D
authors.lastname: Kammerer
authors.forename: Andreas
authors.initials: A
authors.lastname: Schieber
authors.forename: Hilou
authors.initials: H
authors.lastname: Adama
authors.forename: Odile G
authors.initials: OG
authors.lastname: Nacoulma
authors.forename: Reinhold
authors.initials: R
authors.lastname: Carle
mesh_terms: D027721:Amaranthus / Q000737:chemistry*; D002232:Carbocyanines / Q000737:chemistry / Q000302:isolation & purification*; D013058:Mass Spectrometry; D008958:Models, Molecular; D008968:Molecular Conformation; D039281:Nyctaginaceae / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D018547:Plant Stems / Q000737:chemistry
chemical_list: D002232:Carbocyanines; D010636:Phenols; D010936:Plant Extracts