FIG. 2.

Phylogenetic position of the Nostoc sp. strain IO-102-I. A Bayesian majority rule consensus tree inferred from 16S rRNA gene sequences shows the phylogenetic position of Nostoc sp. strain IO-102-I, which falls among symbiotic Nostoc strains. Nostoc sp. strain IO-102-I is distantly related to Nostoc sp. strain 152, the closest known microcystin producer. Bayesian posterior probabilities (≤1.0) are given at the nodes. The sequence accession number is in brackets after the strain code. ○, Aquatic; □, terrestrial; N/a, datum not available.