FIGURE 6.

Phylogenetic placement of isolated bacteria based on their 16S rRNA gene fragment sequences. Neighbor-joining method in MEGA7 with 1,000 bootstrapping replications was used to generate phylogenetic tree. Highly matching sequences of bacteria from public nucleotide databases were included; Escherichia coli RREC I was used as an outgroup. Isolates from cabbage-fed aphids are labeled with red stars, eggplant-fed aphids with green stars, pepper-fed aphids with blue stars, and tobacco-fed aphids with purple stars.