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Fig. 6. One- and two-year-old peach stems inoculated with L. persoonii. Stereomicrograph of transverse view of peach stem inoculated with L. persoonii (Fig. 5) or noninfested malt agar (Fig. 6). Stems were excised at the base and immersed in stain solution to demonstrate the location of nonfunctional xylem tissues (light areas, NX). Note location of functional xylem (FX) in the new callus tissue in Fig. 6 versus the regions of nonfunctional xylem in callus tissues in Fig. 5. Pith (P), gum ducts (GD), and xylem barrier zone (BZ) are present. x8. |
