Fig. 2. Indigofera argentea root microbiome in Jizan soil.

a Principal coordinates analysis (PCoA) of the bacterial microbiomes in the soil, rhizosphere (Rhizo) and endophytic compartment (EC) of indigofera grown in Jizan soil for six weeks. The Soil is distinct from the Rhizo and EC along the first principal component. While the second component separates the Rhizo and EC. Bray-Curtis dissimilarities were calculated with OTU read counts after rarefaction and standard filtering. b Taxonomic classification of bacterial OTUs with relative abundance greater or equal to 5% grouped at the phylum level. The three bars represent the relative abundance of bacterial phyla in Soil, Rhizo and EC. There is a drop in bacterial diversity or number of rare phyla (indicated as “others”) from the Soil to EC. c Venn diagram showing number of enriched OTUs in the Rhizo and EC of indigofera.