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Fig 5. One- and two-year-old peach stems inoculated with L.
persoonii. Stereomicrograph of transverse view of peach stems inoculated with L.
persoonii. 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.
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