Fig. 6 Transverse sections of xylem tissue of (A) P0 and (B) P150 photographed at 1700x magnification, and longitudinal sections of the P0 photographed at (C) 950x and (D) 2200x. The P0 treatment (A) had thinner xylem walls (comparable walls are identified by arrows), with some of the conduits blocked by starchlike granules (S), compared with the thicker xylem walls of the P150 treatment (B), which lacked starchlike granules. (C) shows the abundance of starchlike granules in most of the P0 conduits. (D) shows the presence of mucilage and bacterial growth (BG) in one of the vessel elements of the P0 treatment
