GLYCINE-MAX SIGNALING OF ENVIRONMENTAL-STRESS - DYNAMICS OF INDUCIBLEAROMATIC ALLELOCHEMISTRY

Treatment of Davis soybeans (Glycine mar (L.) Merrill) with a proven s tress elicitor, iodoacetic acid, which binds specifically with sulfhyd ryl groups, induced a defensive phytochemistry, which included increas ed concentrations of aromatic compounds. High-performance liquid chrom atography resolved groups of peaks, including one that contains the ma jor allelochemical daidzein and several that contained relatively nonp olar compounds. Some peak groups were increased quantitatively, while others were decreased by iodoacetic acid elicitation. The more signifi cant differences in methanol-extractable HPLC-resolved aromatic metabo lites between elicited and nonelicited G. max apical leaves occurred a t 24, 48, and 72 hr after elicitation.