Abstract

Three culture types of Hypoxis rooperi T. Moore were examined to determine whether hypoxoside was present. Of these cultures, only root-type cultures were found to contain hypoxoside. Quantification of this compound within these tissues using HPLC, indicated that malformed root (MR) cultures contained the highest levels of hypoxoside. In MR cultures initiated from corm explants, the hypoxoside content was found to fluctuate. Contrary to most reports, neither an increase in sucrose concentration in the basal medium (BM) nor light, stimulated hypoxoside synthesis within this tissue. Alternatively a lowering of the levels of inorganic nitrogen in the BM and the incubation of cultures in continuous darkness, enhanced hypoxoside production.

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