Received for review July 6, 1999. Revised manuscript received January 21, 2000. Accepted January 24, 2000. We thank The Peanut Institute for partial funding of this project. The use of trade names in this publication does not imply endorsement by the USDA or the North Carolina Agricultural Research Service of the products named, nor criticism of similar ones not mentioned.

Abstract:

Resveratrol has been associated with reduced cardiovascular disease and reduced cancer risk. This phytoalexin has been reported in a number of plant species, including grapes, and may be one of the compounds responsible for the health benefits of red wine. Analytical methods for measuring resveratrol in wine and peanuts were adapted to isolate, identify, and quantify resveratrol in several cultivars of peanuts. Aqueous ethanol (80% v/v) extracts from peanuts without seed coats were purified over alumina/silica gel columns and analyzed by reversed phase HPLC using a C-18 column. Peanuts from each market type, Virginia, runner, and Spanish, produced in four different locations contained from 0.03 to 0.14 g of resveratrol/g. Seed coats from runner and Virginia types contained ~0.65 g/g of seed coat, which is equivalent to <0.04 g/seed. Quantitative analysis of 15 cultivars representing 3 peanut market types, which had been cold stored for up to 3 years, indicated a range of 0.02-1.79 g/g of peanut compared to 0.6-8.0 g/mL in red wines.

Keywords: Peanuts; resveratrol; 3,5,4'-trihydroxystilbene; Arachis hypogaea L.

Download the full text: PDF | HTML