Figure 7.

Seasonal regulation of dormancy cycling by chromatin remodelling via modulation of DOG1 expression. The schematic incorporates data from Footitt et al., 2011, 2013 showing changes in soil temperature, DOG1 expression and dormancy to illustrate how chromatin remodelling relates to DOG1 expression during the annual dormancy cycle in the soil seed bank. The nature of chromatin remodelling is suggested by the changing expression patterns of key genes described in the text and the activating and repressive histone marks on DOG1 chromatin. Blue and orange bars indicate Cvi and Bur ecotypes respectively. The height of each bar indicates the amplitude of the response across the seasons and yellow flashes represent exposure to light. Temperature represents the annual fluctuation in soil temperature at seed depth. Seed shedding and emergence timings are based on field observations.