Cultured soybean seedlings were used to investigate how glucose or methioni
ne influenced depletion of ferulic acid. Three-day-old seedlings were grown
in hydroponic solution containing ferulic acid plus glucose or methionine,
and the level of the phenolic acid were monitored in the nutrient culture,
The results showed that ferulic acid depletion was more rapid in the prese
nce of those compounds. After 6 h, the increase caused by glucose (0.01 and
0.05 mM) was more pronounced than methionine in the same concentrations. O
n the other hand, methionine (0.1 and 0.2 mM) increased depletion more sign
ificantly than glucose. Results suggested that both compounds might to incr
ease the allelopathic effects of ferulic acid in the seedlings.