Ferulic acid uptake by soybean root in nutrient culture was investigated by
the depletion method at different concentrations, temperatures and pH. Res
ults showed that soybean roots absorbed this compound at greater rates in t
he concentrations between 0.05-mM and 1.0-mM and it tvas concentration depe
ndent. Ferulic acid uptake was unaffected at pH 4.5 or 6.0 but reduced at p
H 7.0. At pH 6.0, uptake rates decreased significantly with increasing temp
erature of nutrient solution.