Fig. 3

Comparing the taxonomic and functional structure of rhizosphere microbiome between wheat and chickpea growing under + and − decaying root (DR). a The number of enriched OTUs and genes shared between wheat and chickpea under + and − DR. b Ternary plot included all the detected KOs between bulk soil and the rhizosphere of wheat (WHR) and chickpea (CPR) under + and − DR. Each circle indicates one KO. The size of each circle indicates its relative abundance weighted by the average. Each circle’s position is determined by the contribution of bulk soil and two plants’ rhizospheres. Green circles indicate the enriched KOs by wheat rhizosphere compared with bulk soil (log2-fold-change > 1 and the FDR adjusted P value < 0.01). Magenta circles indicate the enriched KOs by chickpea rhizosphere. Cyan circles indicate the enriched KOs by both wheat and chickpea rhizosphere. c Principal coordinate analysis (PCoA) was based on Bray-Curtis distance between the samples using the normalised abundance of OTUs and genes. The percentage of variance explained by principal components 1 and 2 is shown in parenthesis. The unplanted control in −DR referred to bulk soil, and the soil surrounding the decaying root from unplanted control in +DR was the detritusphere soil