Table 4.

Indicator species analysis of bacteria.

OTU (Genus	Associated	Indicator		Relative
or higher)	with	value	p-Value	abundance(%)
Streptomyces	Root	0.999	0.001**	17.56
Rhizobium	Root	0.999	0.001**	7.55
Mycobacterium	Root	0.987	0.001**	4.03
Sphingobium	Root	0.978	0.001**	1.06
Bradyrhizobium	Root	0.973	0.001**	3.10
Mesorhizobium	Root	0.965	0.001**	2.10
micromonosporaceae	Root	0.957	0.001**	4.10
Actinoplanes	Root	0.957	0.001**	2.85
Acidibacter	Root	0.957	0.001**	1.73
Variovorax	Root	0.956	0.001**	1.69
Bosea	Root	0.895	0.004**	1.15
Actinophytocola	Root	0.866	0.001**	3.06
Pseudonocardia	Root	0.866	0.001**	1.00
Amycolatopsis	Root	0.865	0.001**	1.37
Thauera	Stem	0.996	0.001**	2.04
Rhodococcus	Stem	0.977	0.001**	1.15
Prevotella_9	Stem	0.950	0.001**	2.22
Burkholderia	Stem	0.941	0.001**	1.52
Geodermatophilaceae	Stem	0.907	0.020*	1.68
Rhizobium	Daqing	0.764	0.007**	4.12
Mesorhizobium	Daqing	0.707	0.032*	1.60
Actinophytocola	Daqing	0.705	0.047*	3.04
Acidibacter	Qiqihar	0.762	0.035*	1.58

Associations were calculated using species indicator analyses (Indicator value) in R. Data table shows the results for the analysis where rare operational taxonomic units (OTUs) (<1% relative abundance) were excluded. Significance levels: ^∗p ≤ 0.05; ^∗∗p ≤ 0.01. Full results of the indicator species analysis are presented in Supplementary Table S10.