Figure 1.

Key events in plant gametogenesis. PMC—pollen mother cell, MMC—megaspore mother cell, RdDM—RNA directed DNA methylation, VC—vegetative cell, GC—generative cell, SCs—sperm cells, EC—egg cell, SyCs—synergid cells, CC—central cell, ACs—antipodal cells. Increases or decreases in epigenetic features are shown by arrows pointing upwards or downwards, respectively. Genes actively expressed are shown in italics.