| NF | Nod factor |
| T3SS | Type three secretion system |
| Nops | Nodulation outer proteins |
| S. fredii | Sinorhizobium fredii |
| B. diazoefficiens | Bradyrhizobium diazoefficiens |
| TEM | Transmission electron microscopy |
| PBM | Peribacteroid membrane |
| DAI | Days after inoculation |
| PHB | Poly β-hydroxybutyrate |
| EPS | Exopopolysaccharides |
| LPS | Lipopolysaccharides |
| PGPR | Plant growth-promoting rhizobacteria |