|
Fig. 9. Longitudinal sections through the outer bark of poplar cutting inoculated with Cytospora chrysosperma. Section through a portion of bark three weeks after inoculation, showing smaller-diameter intracellular hyphae and loosely woven pycnidial stroma (PS) and immature pycnidium (PYC) breaking through the outer bark. Bar = 40 microns. |
