Data Views Total Plants: 3 CSV Excel PDF Total Activities: 20 Click on column headings to sort table by that column Plant Part All Plant Rhizome Root Low PPM High PPM StdDev *Reference Curcuma longa Root -- 500.0 * Curcuma longa Plant -- -- * Curcuma longa Rhizome 6.6 11100.0 * *Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.