Table 1.
Characterization of isolated PHA producing strains by biochemical tests
| Biochemical test | Results | |||
|---|---|---|---|---|
| ASC1 | ASC2 | ASC3 | ASC4 | |
| Motility | − | + | + | + |
| Oxidase | − | + | − | + |
| Catalase | + | + | + | + |
| Indole production | − | − | − | − |
| Methyl red | − | − | − | − |
| Voges-Proskauer | − | − | + | − |
| Citrate (simmons) | + | + | + | + |
| Triple sugar iron (TSI) reaction | K/K | K/K | A/A | K/A |
| H2S production (TSI) | − | − | − | − |
| Lysine decarboxylase | − | − | − | + |
| Ornithine decarboxylase | + | + | + | + |
| Urease | − | − | + | + |
| Nitrate reduction | + | + | + | − |
K/K alkaline slant/alkaline butt = peptone was used and no carbohydrates were fermented, A/A acid slant/acid butt = glucose, lactose and sucrose were fermented, K/A alkaline slant/acid butt = only glucose was fermented and peptone was used