FIG. 1.

Unrooted distance matrix tree showing phylogenetic relationships of selected strains of proteobacteria based on 16S rDNA sequences. The topology of the phylogenetic tree was evaluated by performing a bootstrap analysis with 1,000 replicates. The numbers at the nodes indicate bootstrap percentages based on 1,000 replicates. The accession numbers for the sequences used are as follows: strain TCRI-14, AB017799; Rhodobacter sphaeroides, D16425; Rhodobacter capsulatus, D16428; Rhodobacter blasticus, D16429; Rhodopseudomonas palustris, D25312; Rhodoplanes roseus, D25313; Rhodopseudomonas acidophila, M34128; Rhodopseudomonas viridis, D25314; Rhodospirillum photometricum, D30777; Rhodophila globiformis, D86513; Rhodobacter sulfidophilus, D16430; Rhodospirillum rubrum, D30778; Rhodospirillum salexigens, M59070; Rhodocyclus tenuis, D16208; Rhodocyclus purpureus, M34132; and Rhodocyclus gelatinosus, D16214.