Table 5. Processed bacterial sequences and taxonomy assignments by sample source.

Taxonomy					Dg_UCD b		Dg_SU c		#OTUs e
Phylum	Class	Order	Family	Genus	Mean	SD d	Mean	SD d
Actinobacteria	Actinobacteria	Frankiales	Frankiaceae	Frankia	85.96%	3.99%	68.29%	1.27%	9
		Mycobacteriales	Mycobacteriaceae	Mycobacterium	0.01%	0.01%	1.34%	0.39%	2
		Streptomycetales	Streptomycetaceae	Streptomyces	0.26%	0.19%	0.03%	0.01%	1
Bacteroidetes	Sphingobacteria	Sphingobacteriales	Flexibacteraceae	Cytophaga	0.06%	0.06%	1.81%	0.18%	2
				Dyadobacter	0.32%	0.33%	0.15%	0.06%	1
Proteobacteria	Alpha-proteobacteria	Caulobacterales	Caulobacteraceae	Caulobacter	0.11%	0.06%	0.46%	0.05%	1
		Rhizobiales	Bradyrhizobiaceae	Afipia	0.32%	0.11%	0.05%	0.03%	1
		Sphingomonadales	Sphingomonadaceae	Novosphingobium	0.28%	0.31%	0.28%	0.14%	1
				Sphingobium	0.23%	0.17%	0.04%	0.01%	1
	Beta- proteobacteria	Burkholderiales			0.21%	0.20%	0.48%	0.01%	1
		Methylophilales	Methylophilaceae	Methylophilus	0.25%	0.21%	0.23%	0.18%	1
	Delta-proteobacteria	Myxococcales			0.04%	0.02%	0.65%	0.18%	1
TM7	TM7-3	EW055			0.0%	0.0%	0.39%	0.15%	1
Unassigned a					5.69%	0.15%	6.87%	1.37%	5
Low abundance a					6.27%	2.49%	18.94%	0.05%	789
Total bacteria reads and OTUs					3424	2006	3535	974	817

^aLow abundance OTUs (less than 0.1% of bacterial sequences), and OTUs not assignable to any taxonomy are summed across OTUs.

^bDg_UCD are D. glomerata nodule samples from University of California Davis, inoculated with a Californian source.

^cDg_SU are D. glomerata nodule samples from Stockholm University, inoculated with a Pakistani source.

^dStandard deviations are based on n = 2.

^e# OTUs refers to the number of OTUs at 97% identity in each taxonomic category.