Germination time factor

Jensen AR 1998 The factor the science of mental ability. Praeger, Westport, CT Kalisz S 1986 Variable selection on the timing of germination in Collinsia verna (Scrophulariaceae). Evolution 40 479-491... 

These results indicate that the total germinative cell cycle time in psoriasis is decreased by a factor of about 12. This is accomplished by the psoriatic cell spending half as much time in S, G2, and M and only one-fifteenth as much time in G,. Psoriasis, therefore, differs from normal skin in having a greater number of cells in the proliferative cell cycle, a greater number of cells undergoing proliferation at any one time, and a shorter period of time required for individual dividing cells to replicate. 

Water is essential for the rehydration of seeds as the initial step towards germination. The amount of water taken up by an imbibing seed depends upon a number of factors (e.g. size, hydratability of contents, etc.) but in absolute terms it is quite small and often may not exceed 2-3 times the dry weight of the seed. For establishment and subsequent growth of the seedling, a larger and sustained water supply is required. 

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