Figure 7.

Schematic Representation of PDV-Mediated Control of the Chloroplast Division Rate That Evolved in Land Plants.

In a common ancestor of land plants, PDV proteins became inserted into the chloroplast division apparatus descended from green algae. PDV mediate recruitment of the eukaryotic DRP5B to the division site in which cyanobacteria-descended FtsZ and ARC6 have been assembled. Levels of PDV expression are regulated by a cytokinin-dependent cell differentiation program, and the PDV level determines the rate of division site constriction.

[See online article for color version of this figure.]