Figure 2

The process of LRP development in rice. (A)-(G) The observation of LRP development in rice using our easy quick method. (G) The emerged lateral root. Bars = 50 μm. (H)-(M) Sections of different stages of LRP. (H) Anticlinal cell divisions in pericycle. (I) Periclinal cell divisions in the center of LRP, resulting in two cell layers, inner layer (IL) and outer layer (OL). Arrow indicates anticlinal cell division in the endodermis. (J) Further development of LRP. Arrow head indicates periclinal cell division in the IL and arrow indicates anticlinal cell division in the OL. (K) The radial pattern begins to appear in the LRP. Arrow indicates the lens shaped cell which would finally form the root cap of lateral root. Arrow head indicates periclinal cell division in the central shelter. (L) and (M) LRP begins to resemble the mature lateral root tip. Arrows in (M) indicate 4 cell layers surrounding the stellar tissue. (N) Longitudinal section of emerged mature lateral root. The outmost shelter still exists around the root.