Gibberellic Acid Controls the Secretion of Acid Phosphatase in Aleurone Layers and Isolated Aleurone Protoplasts ofAvena fatua

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Abstract
The role of gibberellic acid (GA3) in controlling the secretion (across the plasma membrane) and release (through the cell wall) of acid phosphatase (E.C. 3.1.3.2.) from Avena aleurone layers has been investigated. Evidence from this comparative study with intact aleurone layers and isolated aleurone protoplasts reveals that the secretion of acid phosphatase is under GA3 control. The mechanism underlying secretion and release of the enzyme from aleurone cells is discussed.