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. 2016 Feb 23;6:21934. doi: 10.1038/srep21934

Figure 3. SEM observations of O. novo-ulmi growth and elm defense responses within 144 hpi.

Figure 3

(a) a xylem vessel of the susceptible clone at 48 hpi. Arrow refers to conidia attached to xylem vessel wall. (b) Germinating conidia observed inside a xylem vessel of the susceptible clone at 96 hpi. Arrow refers to a germ tube. (c,d) cross sections in the stem of the susceptible clone and ‘Valley Forge’ at 96 hpi, respectively. Arrows refer to a developing hypha and germinating conidium, respectively (e,f) a longitudinal section in the stem of VF at 144 hpi. Double-headed arrows refer to tyloses inside xylem vessels. All images were obtained from the xylem elements in the two most recent annual growth rings of the sapwood.