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The aleurone layer of cereals is a secretory tissue whose activity is regulated by abscisic acid (ABA) and gibberellins (GAs). Whereas GA triggers enzyme synthesis and secretion and initiates a program that culminates in cell death, ABA prevents enzyme production and cell death. Reactive oxygen species (ROS) are key players in regulating cell viability and GA sensitizes the aleurone cell to ROS. Sensitivity...
Aleurone cells are essential for the mobilization of reserves stored in the endosperm of cereals but are not required after seedling establishment. Following imbibition the embryo produces gibberellins (GAs) that initiate a program in the aleurone cell that results in the synthesis and secretion of a broad spectrum of acid hydrolases. When the aleurone layer has fulfilled its role as a secretory gland...
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