Curcumin is thought to be synthesised in leaves and translocated to rhizomes. We know certainly that genotype and environment play important role. But role of many factors is not known.
Article Ginger and turmeric expressed sequence tags identify signatu...
From this, it can be hypothesized that the curcumin is denovo synthesized in rhizome, not trans-located from leaves as mentioned in the Monograph by Dr. Ravindran in Turmeric: the genus Curcuma. Now, we have to see whether this is true by studying the phloem sap.