Fig. 25. Transmission electron micrographs of transverse sections of the boundary zone and necrophylactic periderm of wounded peach bark. Bar = 1 micron. Fig. 25 shows closer view of shared necrophylactic phellem cell walls between P1 and P2 (CW1) and P2 and P3 (CW2) from Fig. 24. Note the fine light and dark lamellations of the suberized secondary walls (S) and the nonlamellate electron-lucid region of the secondary wall adjacent to the primary wall (arrows).