Auxin, Cytokinin, Gibberellin, Abscisic Acid, Ethylene, Brassinolide, Florigens. Seed Germination 1.
Embryo absorbs water, swells, bursts open seed coat.
NO bending 2. Conversion of signal of one form to signal of another form. One hormone may regulate relase of another, and vice versa. Stimulates growth in roots. Mechanisms of Signal Recognition and Signal Transduction differ for each tropism and differ among plant species.