Variability of six secondary metabolites in plant parts and developmental stages in natural populations of rare Gentiana pneumonanthe

Variability in the contents of representative secondary metabolites in Gentiana pneumonanthe individuals was investigated in relation to population origin, plant parts and developmental stage. Chemical analyses (HPLC) of six secondary metabolites (swertiamarin (SWM), gentiopicrin (GP), sweroside (SWZ), mangiferin (MGF), isoorientin (ISOOR), and isovitexin (ISOV)) were performed for individuals from six populations located within a 3 × 3 km area...