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Table 1 Phenotypic identification of biosurfactant producing Halomonas sp BS4 isolated from solar salt works in India in comparison with other Halomonas sp

From: Halomonas sp. BS4, A biosurfactant producing halophilic bacterium isolated from solar salt works in India and their biomedical importance

Characteristics Halomonas sp-BS4 H. salina# H. halophila# H. elongate# H. eurihalina#
Colony Colour Pink Cream-yellow Cream Cream-beige Cream
Cell morphology Short rod Short rod Rod Long Rod Short Rod
Motility + ND ND ND ND
Indole - ND ND ND ND
Methyl Red - ND ND ND ND
VP - ND ND ND ND
NaCl range (% W/v) 0-20 2–20 2–30 0–25 3.5–25
NaCl optimum (% W/v) 8.0 5.0 7.5 11.0 2.0
pH range 5.0-10.0 5.0–10.0 5.0–10.0 5.0–9.0 5.0–10.0
Temperature range 15-45 4–45 10–45 15–45 4–45
Nitrate reduction + + + + +
Oxidase - + + - -
Hydrolysis:      
1. Gelatin + - - + +
2. Urea + + + + +
3. Tyrosine + + - - +
EPS production + + - - +
Acid from:      
1. D-Glucose + - + + -
2. L- Arabinose - - + - +
3. D-Galactose - - + - -
4. Lactose - - - + -
5. Maltose + - + + -
6. Mannose - - + - -
7. Sucrose + - - + -
8. Trehalose ND - + + -
GC Content (%) 53 60.5 59.1 60.4 66.7
  1. #: The data obtained from Romano et al. (1997); ND: Not Determined.