Gibberellin

Plant Hormone - Gibberellin

Gibberellin involves in stem elongation and seed germination.

Gibberellin can alter the rheological properties of the cell wall of plants and it causes gibberellin to stimulate cell elongation. As a result, the water potential of cells is lowered allowing water uptake and an increase in cell volume. 

Gibberellin stimulates seed germination by breaking the seed dormancy. When gibberellic acid (GA) is produced, they migrated to the aleuron layer where hydraulic enzyme production is stimulated. These enzymes are released into the starchy endosperm and digest starch and protein in the inner endosperm wall. Thus this converts insoluble, complex food into soluble, simple food. Ultimately, they are diluted and passed towards growing epicotyl, hypocotyl, radicle, and plumule through the cotyledon.