Fig. 2

Phylogenetic distribution of 16S rRNA gene clone libraries from field-grown maize (AG 2040 hybrid) inoculated with A. brasilense Ab-V5 under different N-fertilization conditions. Light-gray bars Libraries constructed from LN plants, dark-gray bars libraries constructed from RN plants. a Phylogenetic distributions at the family level, b relative abundance of Sphingomonadaceae genera, c relative abundance of non-Sphingomonadaceae genera. Clone libraries as as described in Fig. 1. Classification of family within phylum (for clarity, only the family within each combination is in italics): Bacillaceae, Firmicutes; Burkholderiaceae, Proteobacteria; Moraxellaceae, Proteobacteria; Enterobacteriaceae, Proteobacteria; Xanthobacteraceae, Proteobacteria; Rhizobiaceae, Proteobacteria; Methylobacteriaceae, Proteobacteria; Acetobacteraceae, Proteobacteria; Caulobacteraceae, Proteobacteria; Rhodospirillaceae, Proteobacteria; Sphingomonadaceae, Proteobacteria. Classification of genera according to class, order, and family (in this sequential order; for clarity, only the genus is given in italics): Rhizomonas, Alphaproteobacteria, Sphingomonadales, Sphingomonadaceae; Sphingobium, Alphaproteobacteria, Sphingomonadales, Sphingomonadaceae; Sandaracinobacter, Alphaproteobacteria, Sphingomonadales, Sphingomonadaceae; Novosphingobium, Alphaproteobacteria, Sphingomonadales, Sphingomonadaceae; Sphingomonas, Alphaproteobacteria, Sphingomonadales, Sphingomonadaceae; Bacillus, Bacilli, Bacillales, Bacillaceae; Burkholderia, Betaproteobacteria, Burkholderiales, Burkholderiaceae; Acinetobacter, Gammaproteobacteria, Pseudomonadales, Moraxellaceae; Escherichia, Gammaproteobacteria, Enterobacteriales, Enterobacteriaceae; Enterobacter, Gammaproteobacteria, Enterobacteriales, Enterobacteriaceae; Xanthobacter, Alphaproteobacteria, Rhizobiales, Xanthobacteraceae; Rhizobium, Alphaproteobacteria, Rhizobiales, Rhizobiaceae; Methylobacterium, Alphaproteobacteria, Rhizobiales, Methylobacteriaceae; Gluconobacter, Alphaproteobacteria, Rhodospirillales, Acetobacteraceae; Acidiphilum, Alphaproteobacteria, Rhodospirillales, Acetobacteraceae; Azospirillum, Alphaproteobacteria, Rhodospirillales, Rhodospirillaceae; Brevundimonas, Alphaproteobacteria, Caulobacterales, Caulobacteraceae