Abstract
The cereal aleurone layer has proved to be an ideal system in which to study the mechanism of gibberellin (GA) action at both the cellular and molecular levels. However, evidence that endogenous GAs are regulating the synthesis of hydrolytic enzymes in the aleurone during germination of intact grains is fragmentary and often contradictory (for reviews, see refs. 1–5). From work initiated in the 1960s, a relatively simple hormonal model for germinating cereal grains was proposed whereby GA1 (or GA3) produced in the embryo (either in the scutellum or embryonic axis) diffused to the aleurone layer where it initiated de novo synthesis of several hydrolytic enzymes, including α-amylase. These enzymes were secreted into the endosperm, and the products of reserve degradation were utilized by the growing embryo.
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Lenton, J.R., Appleford, N.E.J. (1991). Gibberellin Production and Action during Germination of Wheat. In: Takahashi, N., Phinney, B.O., MacMillan, J. (eds) Gibberellins. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3002-1_13
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DOI: https://doi.org/10.1007/978-1-4612-3002-1_13
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