Steviol glycoside content in different organs of Stevia rebaudiana and its dynamics during ontogeny
2003
Bondarev, N.I. | Sukhanova, M.A. | Reshetnyak, O.V. | Nosov, A.M. (Russian Academy of Sciences, Moscow (Russian Federation)
The aim of the present work was to characterise the distribution of three major steviol glycosides (SGs, stevioside and rebaudiosides A and C) in vegetative and generative organs of Stevia rebaudiana during ontogeny. The samples were analysed with HPLC. Plant organs contained different amounts of the SGs that declined in the following order: leaves, flowers, stems, seeds, roots. The highest concentration of the SGs was found in upper young actively growing shoot sections, whereas lower senescent shoot sections exhibited the lowest amount of such compounds. During ontogeny a gradual increase in the SGs concentration was observed in both mature stevia leaves and stems, and this process lasted up to the budding phase and the onset of flowering.
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