Both a-amylase and acid phosphatase increase in amount in the walls of
the aleurone layer prior to their release. Isolated aleurone layers incubated in the
absence of GA3 accumulate acid phosphatase (Fig. 8.14) in the inner region of
the wall, indicating that the synthesis and release of this enzyme from the
cytoplasm are not gibberellin dependent. But release from the cell walls (and