pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-18-1-7 Articles Variation in Phytoalexin Production by Peanut Seed from Several Genotypes1 B. Mohanty 2, S. M. Basha 2, *, D. W. Gorbet 3, R. J. Cole 4, and J. W. Dorner 4 Peanut Research Laboratory, Division of Agricultural Sciences, Florida A & M University, Tallahassee, FL 32307 Agricultural Research Center, IFAS, University of Florida, Marianna, FL 32446 National Peanut Research Laboratory, USDA-ARS, Dawson, GA 31742

1This research was supported by a grant from the USDA-SEA/CSRS, Washington, D.C. and is based upon work supported by the USDA-ARS, No. 58–43YK-7–0043 and National Peanut Foundation.

 *Corresponding author. 1 1991 18 1 19 22 8 2 1991 American Peanut Research and Education Society 1991 American Peanut Research and Education Society Abstract

Evaluation of twenty peanut (Arachis hypogaea L.) genotypes for their phytoalexin producing ability showed wide variation in the amount and composition of phytoalexins produced. Some genotypes produced one major phytoalexin component while the other genotypes produced seven major phytoalexin components. In addition, high phytoalexin producing genotypes utilized more methionine-rich protein than the low phytoalexin producing genotypes suggesting that methionine-rich protein or its breakdown products may have a role in phytoalexin production.

 Key Words α-amino nitrogen; , peanut genotypes; , phytoalexins; , methionine-rich protein