Initial Events after the Fulfillment of Dormancy

Parenchyma cells go into dormancy in the DNA presynthetic phase (G,) (Adamson, 1962 Mitchell, 1967), and when these cells are held on a culture media containing 2,4-dichlorophenoxyacetic acid 

Biology and Chemistry of Jerusalem Artichoke Helianthus tuberosus L. 

As mentioned previously, when dormant there are low amounts of polyamines in the tubers however, they are synthesized rapidly when dormancy is broken (Del Duca and Serafini-Fracassini, 1993 Serafini-Fracassini et al., 1984), the onset of which occurs very early in the G, phase. Likewise, immediately after the fulfillment of the dormancy, there was a marked decrease in arginine and glutamine (precursors of polyamines) and a corresponding increase in polyamines (Durst and Duranton, 1966 Serafini-Fracassini et al., 1980). 

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