Structural variability and niche differentiation in the rhizosphere and endosphere bacterial microbiome of field-grown poplar trees

Table 3 Indicator species analysis

OTU (Genus or higher)	Plant compartment	Indicator value	P	Relative abundance (%)
Arthrobacter	Rhizosphere soil	0.978	0.0015**	4.403
Nitrospira	Rhizosphere soil	0.977	0.0024**	1.040
Nocardioides	Rhizosphere soil	0.970	0.0028**	1.117
Hyphomicrobiaceae	Rhizosphere soil	0.962	0.0036**	1.521
Mycobacterium	Rhizosphere soil	0.911	0.0068**	1.559
Microvirga	Rhizosphere soil	0.874	0.0119*	2.684
Novosphingobium	Root	0.981	0.0230*	3.761
Niastella	Root	0.960	0.0234*	2.013
Alcaligenaceae	Stem	0.886	0.0286*	2.205
Amnibacterium	Stem	0.830	0.0290*	1.104
Sphingomonadales	Leaf	0.937	0.0266*	2.079
Aurantimonas	Leaf	0.904	0.0270*	2.900

Associations were calculated with the Dufrene–Legendre indicator species analysis routine (Indval, indicator value) in R. Data table shows results for the analysis where rare OTUs (<1% relative abundance) were excluded. Significance levels: *P ≤ 0.05; **P ≤ 0.01. P values were corrected for multiple comparisons using the false discovery rate (FDR) with the Benjamini–Hochberg method. Full results of indicator species analysis are presented in Additional file 6

ISSN: 2049-2618