Light dependent synthesis of cholecalciferol in a green plant

Zucker, H.; Stark, H.; Rambeck, W.A.

Nature, UK 283(5742): 68-69


DOI: 10.1038/283068a0
Accession: 000691602

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Cholecalciferol (vitamin D3) was synthesized in Trisetum flavescens only in the presence of UV light. A short single exposure to UV light resulted in considerable vitamin D activity. Cholecalciferol conc. ranged from 0.05 to 0.15 mg/kg whole plant DM and was independent of growth stage, 1st or 2nd cut, soil type, geographical area and alt. Activity was mainly confined to the leaves. Samples of the closely related T. elatior (Avena elatior, Arrhenatherum elatius) were inactive. Cocksfoot showed slight but insignificant vitamin D activity.