C. C. Pearson’s scientific contributions

... Three conditions are required for a seed to germinate: (1) viability, (2) non-dormancy, and (3) favourable conditions. The availability of these requirements may cause the initiation of germination, which will take place in five consecutive stages: (1) water uptake by the seed, (2) activation of hormones, enzymes, and cellular respiration, (3) breakdown and movement of stored reserves to the embryo, (4) use of the mobilized reserves by the embryo as a source of energy for cellular activity and growth, and (5) cell division and embryo elongation that enable the radicle to protrude from the seed coat [61]. These stages, which have been studied extensively in cereals, especially barley (Hordeum vulgare L.), are discussed briefly here. ...

Reference:

Environmental Regulation of Weed Seed Dormancy and Germination