FIG. 5.

Bacterial rRNA gene sequences found on more than one plant species arranged in a neighbor-joining tree calculated with the Jukes-Cantor model (Escherichia coli positions 104 to 894; 666 bp), aligned using ARB, and subjected to a 50% base pair frequency filter in which gaps were treated as valid base pairs. Short sequences were added to the neighbor-joining tree with ARB_Parsimony. Phylum, subphylum, family and genus assignments were made with Naive Bayesian rRNA Classifier v. 2.0 of the Ribosomal Database Project using an 80% confidence threshold (70a). Green indicates leaf-attached bacteria, and red indicates root-attached bacteria. Sequences used in this study are indicated by bold type (see Table 3).