Abstract

Silymarin (Sm) from the fruit of Silybum marianum is an isomeric mixture of pharmacologically active flavonolignans which are formed by oxidative coupling of taxifolin (Tx) and coniferyl alcohol (CA). Suspension cultures of this plant constitutively secrete small amounts of Sm into the extracellular medium. Production can be increased by inclusion of cyclodextrins (CDs) in cultures. Both hydroxylated (RHCD) and dimethylated (RMCD) CDs strongly induced prompt accumulation of CA in the medium followed by a late production of flavonolignans. Simultaneous addition of methyl jasmonate (MJ) and RMCD to cells did not significantly modify CA release or flavonolignan accumulation. Delayed addition of MJ to cultures subcultivated in medium containing RMCD markedly influenced Sm production by promoting conversion of the previously formed CA precursor.

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