Gibberellins mobilize nutrients during seed germination.
- Germination starts when a seed imbibes water.
- The embryo releases gibberellin (GA) to the aleurone
(outer layer of the seed coat).
- The aleurone secretes α-amylase to hydrolyze sugars in the endosperm.
- Sugars absorbed from the endosperm by the scutellum (cotyledon)
are consumed as the embryo grows.