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Figure 1. 

A diagrammatic working model of the TREE1/DAZ3-controlled development of embryonic hypothesis and root meristem. The sperm-cell-delivered TREE1 and DAZ3 proteins bind to the promoter region of RKD2, a transcription factor expressed in the egg cell, to suppress its transcription during subsequent embryonic development. This suppression ensures proper cell division and differentiation in the root lineage from the early stages of hypophysis formation. During this process, jasmonate (JA) signaling genetically works in concert with TREE1 and DAZ3 to maintain the correct development of the root lineage. In the tree1 daz3 double mutant, however, the continued expression of RKD2 disrupts this process. Although JA signaling remains intact and can partially compensate for the loss of TREE1 and DAZ3, it is insufficient to fully counteract the harmful effects caused by the loss of these proteins. The region outlined with dashed lines represents the root lineage.