Table 1.
Selected bacterial strains of the root microbiome of Indigofera argentea grown in Jizan soil.
| Source | Strain Code | OTU | Class | Order | Family | Genus |
|---|---|---|---|---|---|---|
| Current work | Highly abundant | |||||
| SA670 | 5 | Actinobacteria | Actinobacteria | Streptomycetaceae | unclassified | |
| SA087 | 9 | Beta-Proteobacteria | Burkholderiales | Oxalobacteraceae | Massilia | |
| SA424 | 14 | Beta-Proteobacteria | Burkholderiales | Burkholderiaceae | Ralstonia | |
| SA444 | 30 | Actinobacteria | Actinobacteria | Streptomycetaceae | Streptomyces | |
| SA613 | 71 | Gamma-Proteobacteria | Pseudomonadales | Pseudomonadaceae | Pseudomonas | |
| SA244 | 136 | Gamma-Proteobacteria | Pseudomonadales | Pseudomonadaceae | Pseudomonas | |
| SA619 | 203 | Actinobacteria | Actinobacteria | Streptomycetaceae | Streptomyces | |
| SA681 | 326 | Actinobacteria | Actinobacteria | Streptomycetaceae | unclassified | |
| SA113 | 171 | Actinobacteria | Actinobacteria | Actinomycetaceae | unclassified | |
| Potential PGPRs | ||||||
| SA403 | 38 | Alpha-Proteobacteria | Rhizobiales | Rhizobiaceae | Ensifer | |
| SA436 | 49 | Firmicutes | Bacillales | Bacillaceae | Bacillus | |
| Previous work | SA148 | - | Alpha-Proteobacteria | Rhizobiales | Brucellaceae | Ochrobactrum |
| SA187 | 955 | Gamma-Proteobacteria | Enterobacterales | Enterobacteriaceae | Enterobacter | |
| SA188 | 17 | Gamma-Proteobacteria | Pseudomonadales | Moraxellaceae | Acinetobacter | |
| SA190 | 1333 | Gamma-Proteobacteria | Pseudomonadales | Pseudomonadaceae | Pseudomonas |
Eleven strains were isolated in this study, including nine strains belonging to highly abundant OTUs representing ~40% and ~30% of rhizosphere and endophytic compartment, respectively, and two low abundant or rare strains with potential PGPR traits. Four additional strains with PGPR straits were collected from previous studies. These 15 strains together were used for SynCom construction.