Root of Arnebia euchroma (Royle) I.M. Johnst. ( Ratanjot/G aozaban) yieIds red coIoured naphthoquinone pigments, which are traditionally used as a natural colour in food and cosmetics, and have good therapeutic potency (as antibiotic, antipyretic, antihelminthetic and antiseptic). Using bioreactor based plant cell culture technology, CSIR-IHBT has developed an eco- friendly process to produce naphthoquinone pigments from Ratanjot, which is a critically endangered himalayan medicinal herb
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