Figure 3.

Bacterial community structure associated with Romaine lettuce leaves. Shown is the RDP Classifier analysis of sequences pooled from 88 leaf samples, with 2836 sequences representing each sample. The five columns represent different taxonomic ranks (Phylum, Class, Order, Family and Genus), and each box within a column represents a distinct taxon within that taxonomic rank. The height of each box corresponds to the percentage of all sequences that were assigned to the taxon, which is represented by that box, and the heights of all boxes in a single column add up to 100%. The boxes of abundantly represented taxa are labeled with the name of those taxa. Of all sequences, 97% could be assigned at the Class level, 93% at the Order level, 89% at the Family level and 71% at the Genus level; less than 2% were labeled as ‘Unclassified Bacteria'. The largest group of sequences that could be assigned at the Family but not Genus level were ‘Unclassified Enterobacteriaceae' (5%).