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Figure 1 | BMC Microbiology

Figure 1

From: Downy mildew disease promotes the colonization of romaine lettuce by Escherichia coli O157:H7 and Salmonella enterica

Figure 1

Photographs illustrating in the upper panel, typical downy mildew disease symptoms on the abaxial lettuce leaf surface with chlorotic and necrotic tissue, and white/grey spores of B. lactucae hyphae emerging from the infected tissue. In the lower panel, typical leaf discs of healthy, chlorotic, and necrotic (left to right) tissue of romaine lettuce tissue cultivar Green Towers used as samples for measurement of EcO157 population sizes in our study.

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