Comparative investigation of O-And C-glycosylflavones in leaves of six Santalum insulare (santalaceae) varieties

Abstract

Leaves (108 samples) of six Santalum insulare (Santalaceae) varieties, i.e. raivavense, margaretae, marchionense, raiateense, alticola, and insulare from French Polynesia, have been investigated for their O-And C-glycosylflavone contents. Apigenin-7-O-neohesperidoside was found in low amounts in all varieties except in some samples of variety insulare, whereas luteolin-7-O-neohesperidoside was found in high amounts in alticola and insulare varieties (19.2 and 24.9%, respectively). Apigenin-8-C-β-D-glucopyranoside (vitexin) was found in all varieties with contents ≤ 4.3 %, and the content of apigenin-6-C-β-Dglucopyranoside (isovitexin) was highest in marchionense variety (12.5%). Luteolin-6-C-β-D-glucopyranoside (isoorientin) contributes to the differentiation of marchionense and alticola varieties (39.6 and 40.5%, respectively), whereas apigenin-6,8-di-C-β-D-glucopyranoside (vicenin-2) was found in high amounts in raivavense, margaretae, and raiateense varieties (56.2, 53.7 and 55.8% respectively), together with luteolin-6,8-di-C-β-D-glucopyranoside (lucenin-2) (12.4, 15.8 and 18.6% respectively).