Table 1.
Morphological and biochemical characterization of zinc-solubilizing Bacillus isolates
| Characteristics | Isolates/Standards | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| KHBD-2-1A | BDKH-3 | BD-3-1B | BDSD-2-2C | BDN-5 | KHTH-4-1 | KHBAR-1 | KHBD-6 | KDMR-1-1 | B. cereus | |
| Appearance | D | S | D | S | S | S | S | Sm | S | Sm |
| Form | C | C | C | C | C | C | C | Ir | C | C |
| Margin | Sr | Fil | L | Un | E | Un | Ir | Ir | Fil | L |
| Elevation | F | F | F | F | R | Um | F | F | F | F |
| Pigmentation | W | W | Y | W | O | W | W | Y | W | W |
| Gram reaction | + | + | + | + | + | + | + | + | + | + |
| Spore staining | + | + | + | + | + | + | + | + | + | + |
| Catalase | + | + | + | + | + | + | + | + | + | + |
| Oxidase | + | + | − | + | − | + | + | + | + | + |
| Nitrate reduction | + | + | + | + | − | + | + | + | + | + |
| Arginine dihydrolase | + | + | − | + | − | − | + | + | + | − |
| Indole-3-acetic acid | − | − | + | − | − | − | − | − | + | − |
| Starch hydrolysis | + | + | NA | + | + | NA | NA | − | + | − |
| Casein hydrolysis | + | + | + | + | + | + | + | + | + | + |
| VP test | + | + | + | + | + | + | + | − | + | + |
| Citrate utilization | − | − | − | − | − | − | − | + | − | − |
| Methyl red | + | + | + | + | + | + | + | − | + | + |
D Dull, C Circular, S Shiny, Sr Serrate, F Flat, W White, R Raised, E Entire, Fil Filamentous, Y Yellow, O Orange, L Lobate, Un Undulated, Um Umbonate, Ir Irregular, Sm Smooth, NA Not assessed