Abstract
The formation of phenolic acid in carrot cells grown in suspension culture was examined in relation to cell growth and the concentration of 2,4-dichlorophenoxyacetic acid (2,4-D). Cells multiplied and grew through logarithmic, linear and stationary phases. At all these phases, caffeic, ferulic and p-hydroxybenzoic acids were detected. Biosynthesis of these acids was higher in the early logarithmic phase than at any other phase and rapidly declined in the stationary phase. By lowering the concentration of 2,4-D, these organic acids, and the activity of phenylalanine ammonia-lyase were markedly increased.
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