title: Piceatannol, a potent bioactive stilbene, as major phenolic component in Rhodomyrtus tomentosa.
abstract: The sim fruit (Rhodomyrtus tomentosa) has long been used in folk medicine to treat diarrhoea, dysentery, and to boost the immune system. The purpose of this work was to determine its phenolic profile and to evaluate the changes of content during maturation, as well as the variations induced by environmental conditions. Using HPLC-ESI-HR-MS, 19 phenolic compounds (PCs) were tentatively characterised and included stilbenes and ellagitannins as major components, followed by anthocyanins, flavonols, and gallic acid. PCs were then further quantified by HPLC-DAD. Piceatannol, a promising health-promoting stilbene component, was the major PC in the fruit with a concentration of 2.3mg/g dry weight at full maturity stage. This concentration is 1000-2000 times higher than that of red grapes, a major source of stilbene in the human diet. During maturation, the contents in piceatannol and other stilbenes, ellagitannins, and flavonols decreased while the anthocyanin content increased. Shade-grown sim fruits showed significantly higher piceatannol levels than sun-exposed fruits. Taken together, these findings highlight the potential of sim, an under-utilised plant species from South-East Asia, as a source of health-promoting fruits.
authors: Institut des Sciences de la Vie, UCLouvain, B-1348 Louvain-la-Neuve, Belgium.
authors: Thi Ngoc Ha
authors: TN
authors: Lai
authors: Marie-France
authors: MF
authors: Herent
authors: Joëlle
authors: J
authors: Quetin-Leclercq
authors: Thi Bich Thuy
authors: TB
authors: Nguyen
authors: Hervé
authors: H
authors: Rogez
authors: Yvan
authors: Y
authors: Larondelle
authors: Christelle M
authors: CM
authors: André
mesh_terms: D002851:Chromatography, High Pressure Liquid; D005638:Fruit / Q000737:chemistry*; D013058:Mass Spectrometry; D027822:Myrtaceae / Q000737:chemistry* / Q000254:growth & development; D010636:Phenols / Q000032:analysis*; D010936:Plant Extracts / Q000032:analysis*; D013267:Stilbenes / Q000032:analysis*
chemical_list: D010636:Phenols; D010936:Plant Extracts; D013267:Stilbenes; C041525:3,3',4,5'-tetrahydroxystilbene