SummaryIn the Arabidopsis root, asymmetric stem-cell divisions produce daughters that form the different root cell types. Here we report the establishment of a confocal tracking system that allows the analysis of numbers and orientations of cell divisions in root stem cells. The system provides direct evidence that stem cells have lower division rates than cells in the proximal meristem. It also allows tracking of cell division timing, which we have used to analyse the synchronization of root cap divisions. Finally, it gives new insights into lateral root cap formation: epidermal stem-cell daughters can rotate the orientation of the division plane like the stem cell.

2 It has been suggested that, after hydrolysis of triglyceride, cholesteryl ester in remnant particles can be deposited in the arterial wall.34 Cholesteryl ester in chylomicrons and chytomicron remnants can be derived from the intestine 5 or from other lipoproteins present in plasma by the action of lipid transfer