Table 3 Characterization of selected mercury tolerant strains.
Test | MTS2C | MTS3A | MTS4B | MTS6A |
|---|---|---|---|---|
Pigmentation | Cream | Light orange | Cream | White |
Colony morphology | Round, convex, S-type | Round, shiny, convex | Round, shiny, convex | Shiny, convex, watery |
Identity | Staphylococcus sciuri | Staphylococcus arlettae | Staphylococcus cohnii | Lactobacillus salivarius |
Homology | 99.89% | 99.92% | 99.77% | 99.46% |
Accession number | PP415850 | PP436698 | PP416278 | PP815117 |
MIC (mg/ml) | 0.3 | 0.2 | 0.09 | 0.1 |
Mercury removal | 82.35% | 75.21% | 61.95% | 37.47% |
Gram stain | + | + | + | + |
Morphology | Cocci | Cocci | Paired cocci | Cocci |
Methyl red test | + | + | + | − |
Citrate | − | − | − | − |
Coagulase | − | − | − | − |
Gelatin hydrolysis | + | + | − | − |
Nitrate reduction | + | − | − | − |
Urease test | − | − | + | − |
Voges Proskauer | − | − | − | − |
Motility test (SIM) | − | − | − | − |
Starch hydrolysis | − | − | + | + |
Catalase | + | + | + | + |
IAA production | − | − | − | − |
HCN production | + | + | + | + |
Phosphate solubilization | + | + | − | − |
Ammonia production | − | − | − | + |
Siderophore production | − | + | + | − |
