Data Views Total Plants: 3 CSV Excel PDF Total Activities: 7 Click on column headings to sort table by that column Plant Part All Leaf Root Tissue Culture Low PPM High PPM StdDev *Reference Rheum rhabarbarum Root -- -- * Fagopyrum esculentum Tissue Culture -- -- * Camellia sinensis Leaf 3077.0 3180.0 * *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.