Fig. 2.

Phylogenetic distribution of OTUs for Alphaproteobacteria responding to environmental factors in the 16S rRNA gene clone libraries of rice leaf blade- and leaf sheath-associated bacteria under ambient and FACE conditions. The dendrogram indicates the phylogenetic relationships among the representative sequences of OTUs (defined by ≥97% identity). The table indicates the relative abundance of clones belonging to each OTU in each library and the results of a BLAST search using the representative sequences. ** and * indicate significant differences between the control (ambient CO₂ with normal temperature and standard nitrogen level) and other samples at P<0.01 and P<0.05, respectively. Shading indicates OTUs described in the main text.