Comparison of physicochemical properties by different parts of Rhus verniciflua and food properties of Rhus verniciflua seed

The goal of this study was to provide basic data for various parts of Rhus verniciflua (R. verniciflua), and based on these data, to suggest the parts thereof that may be used as food material along with the xylem. Analysis of the proximate compositions revealed that the leaves contained mainly carbohydrates; the shoots crude protein; and the stems and seeds contained mainly crude fiber. All these parts were found to be rich in potassium and magnesium in terms of their mineral content. The total urushiol content was the lowest in the seeds at 0.92 mg/100 g. The total polyphenol and flavonoid content were highest in the shoots and leaves, respectively. Physicochemical analysis indicated that the seeds may be used as a food material, along with the xylem. According to DPPH and ABTS scavenging activity analysis, 50% ethanol was considered appropriate as a solvent for seed extraction. Cytotoxicity analysis of the seeds extracted with 50% ethanol confirmed that none of the components were present at cytotoxic levels. The findings of this study provide basic information regarding the use of R. verniciflua seeds as a food source.