Table 1.
Biochemical characteristics of selected plant growth-promoting rhizobacteria isolates
| Isolate code | Cellular shape | Colonial elevation | Colonial edge | Colonial opacity | Colonial surface | Colonial pigmentation | Cellular arrangement |
|---|---|---|---|---|---|---|---|
| MNWU14 | Rod | Raised | Lobate | Translucent | Dull | Whitish Cream | Clusters |
| SNWU3 | Rod | Raised | lobate | Opaque | Dull | Whitish Cream | Clusters |
| SNWU14 | Rod | Raised | Lobate | Translucent | Dull | Whitish Cream | Chain |
| SNWU15 | Rod | Raised | Entire | Opaque | Dull | Whitish Cream | Clusters |
| SNWU5 | Rod | Raised | Lobate | Opaque | Dull | Whitish Cream | Clusters |
| SNWU13 | Rod | Raised | Lobate | Translucent | Smooth | Whitish Cream | Clusters |
| MNWU5 | Rod | Flat | Entire | Opaque | Dull | Whitish Cream | Chain |
| MNWU16 | Rod | Raised | Lobate | Opaque | Pigmented | Whitish Cream | Clusters |
| SNWU1 | Rod | Raised | Entire | Opaque | Smooth | Whitish Cream | Clusters |
| MNWU4 | Rod | Raised | Lobate | Opaque | Smooth | Whitish Cream | Clusters |
| MNWU15 | Rod | Raised | Entire | Opaque | Smooth | Whitish Cream | Clusters |
| SNWU9 | Rod | Raised | Entire | Translucent | Dull | Whitish Cream | Clusters |
| MNWU2 | Rod | Raised | Entire | Translucent | Dull | Whitish Cream | Clusters |
| MNWU3 | Cocci | Flat | Entire | Opaque | Dull | Whitish | Cluster |
| MNWU6 | Rod | Raised | Entire | Opaque | Dull |
Creamy White |
Clusters |
| SNWU7 | Rod | Raised | Lobate | Translucent | Smooth |
Creamy White |
Clusters |
| MNWU1 | Rod | Raised | Lobate | Opaque | Dull | Cream | Custer |
| SNWU8 | Rod | Raised | Lobate | Opaque | Dull | Whitish | Clusters |
| MNWU10 | Rod | Flat | Lobate | Opaque | Dull | Whitish | Clusters |
| SNWU16 | Rod | Raised | Lobate | Opaque | Smooth |
Creamy White |
Clusters |
| MNWU4 | Rod | Raised | Lobate | Opaque | Dull | White | Clusters |
| MNWU7 | Rod | Raised | Entire | Opaque | Smooth |
Creamy White |
Clusters |
| MNWU13 | Rod | Raised | Entire | Opaque | Smooth |
Creamy White |
Clusters |
| SNWU4 | Rod | Raised | Entire | Opaque | Smooth |
Creamy White |
Clusters |
| SNWU10 | Cocci | Raised | Entire | Opaque | Smooth |
Creamy White |
Clusters |
| SNWU17 | Rod | Raised | Lobate | Opaque | Pigmented | Grey | Clusters |
| Gram’s staining | Motility test | Spore staining | Catalase | Starch Hydrolysis | Citrate | VP | Casein | Indole |
|---|---|---|---|---|---|---|---|---|
| + | + | + | + | + | + | + | + | − |
| + | + | + | + | + | + | + | + | − |
| + | + | + | + | − | + | + | + | − |
| + | + | + | + | + | + | − | − | − |
| + | + | + | + | + | + | − | + | − |
| − | − | − | + | + | − | + | − | − |
| + | + | + | + | + | − | − | + | − |
| − | − | − | + | − | + | − | − | − |
| + | − | − | + | + | + | − | + | − |
| − | + | − | + | + | + | − | + | − |
| + | + | + | + | − | − | − | − | − |
| + | + | + | + | + | + | − | + | − |
| + | + | + | + | + | − | − | + | − |
| + | − | − | + | − | + | − | + | − |
| + | + | + | + | + | − | − | + | − |
| + | − | + | + | + | − | − | − | − |
| + | + | + | + | + | − | − | + | − |
| + | + | + | + | + | + | − | + | − |
| + | + | + | + | + | + | − | + | − |
| + | + | + | + | − | − | − | − | − |
| + | + | + | + | − | + | − | + | − |
| + | − | − | + | + | + | − | + | − |
| + | + | + | + | − | + | − | + | − |
| + | + | + | + | + | + | − | + | − |
| + | + | + | + | + | + | − | + | − |
| − | − | − | + | − | + | − | + | − |
| Isolate code | Nitrate reduction | Oxidase | Carbohydrates Utilization | Fructose | Xylose | Galactose | |||
|---|---|---|---|---|---|---|---|---|---|
| Maltose | Lactose | Glucose | Sucrose | ||||||
| MNWU14 | + | + | + | + | + | + | + | − | − |
| SNWU3 | + | − | + | − | + | − | − | − | − |
| SNWU14 | + | + | + | − | + | + | − | − | − |
| SNWU15 | + | + | + | − | + | − | + | − | − |
| SNWU5 | + | + | + | + | + | + | + | − | − |
| SNWU13 | + | − | + | − | + | + | − | − | − |
| MNWU5 | + | + | + | − | + | − | − | − | − |
| MNWU16 | + | + | + | − | − | + | − | − | − |
| SNWU1 | + | − | + | + | + | + | + | − | − |
| MNWU4 | + | + | + | − | + | − | + | − | + |
| MNWU15 | + | − | + | − | + | − | − | − | − |
| SNWU9 | + | + | + | + | + | + | + | − | − |
| MNWU2 | + | + | + | − | + | + | + | − | − |
| MNWU3 | + | + | + | + | + | + | + | − | − |
| MNWU6 | + | + | + | − | + | + | + | − | − |
| SNWU7 | + | − | + | + | + | + | + | − | − |
| MNWU1 | + | + | + | − | + | + | + | + | − |
| SNWU8 | + | − | + | − | + | + | − | − | − |
| MNWU10 | + | − | + | + | + | + | + | − | − |
| SNWU16 | + | + | + | − | + | + | − | − | − |
| MNWU4 | + | + | + | + | + | + | + | − | + |
| MNWU7 | + | − | + | + | + | − | + | − | − |
| MNWU13 | − | + | + | − | + | − | + | − | − |
| SNWU4 | + | + | + | − | + | + | + | − | − |
| SNWU10 | + | + | + | − | + | + | + | − | − |
| SNWU17 | + | + | + | − | + | + | + | − | − |
− = Negative, + = Positive