Figure 1.

Seed compartments and seed germination kinetics of Arabidopsis seeds. A, A section through an Arabidopsis seed depicting the different seed compartments. B, Different stages during seed germination including TR (which exposes the underlying endosperm layer) and ER (also known as RAD protrusion or germination sensu stricto). C, Arabidopsis seed germination analyzed by measuring TR (gray line), ER (black line), and seed water content (WC; blue diamonds). Below the graph, the time points and physiological stages (dry, NR, TR, and ER) are indicated for each sample. The 29 samples that were analyzed are schematically shown below the germination graph by the yellow pictograms. D, The four seed sections that were used for transcriptome analysis.