title: Production of stilbenoids and phenolic acids by the peanut plant at early stages of growth.
abstract: The peanut plant (Arachis hypogaea) is known to produce stilbene phytoalexins as a defensive response to fungal invasion; however, the distribution of phytoalexins among different organs of the peanut plant at early stages of growth under axenic conditions has not been studied. Axenic plants produced a stilbenoid, resveratrol, as well as soluble bound and free phenolic acids, including 4-methoxycinnamic acid, which is reported in peanuts for the first time. Neither resveratrol nor phenolic acids were found in the root mucilage; the prenylated stilbenes were restricted to the mucilage and were not found in other organs of the peanut plant. These findings may lead to a better understanding of the defensive role of peanut stilbenes and phenolic acids.
authors.affiliation: National Peanut Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, P.O. Box 509, Dawson, Georgia 39842, USA. vsobolev@nprl.usda.gov
authors.forename: Victor S
authors.initials: VS
authors.lastname: Sobolev
authors.forename: Bruce W
authors.initials: BW
authors.lastname: Horn
authors.forename: Thomas L
authors.initials: TL
authors.lastname: Potter
authors.forename: Stephen T
authors.initials: ST
authors.lastname: Deyrup
authors.forename: James B
authors.initials: JB
authors.lastname: Gloer
mesh_terms: D000975:Antioxidants / Q000032:analysis; D010367:Arachis / Q000737:chemistry* / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002934:Cinnamates / Q000032:analysis; D006868:Hydrolysis; D062385:Hydroxybenzoates / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D018517:Plant Roots / Q000737:chemistry; D000077185:Resveratrol; D036226:Seedlings / Q000737:chemistry; D012639:Seeds / Q000737:chemistry; D012717:Sesquiterpenes; D021241:Spectrometry, Mass, Electrospray Ionization; D013267:Stilbenes / Q000032:analysis*; D013729:Terpenes / Q000032:analysis; D000094162:Phytoalexins
chemical_list: D000975:Antioxidants; D002934:Cinnamates; D062385:Hydroxybenzoates; D012717:Sesquiterpenes; D013267:Stilbenes; D013729:Terpenes; C063318:4-methoxycinnamic acid; D000077185:Resveratrol; D000094162:Phytoalexins