Biofilm-Mediated Enhanced Crude Oil Degradation by Newly Isolated Pseudomonas Species
Table 2
Preliminary biochemical tests for isolated bacterial strains.
Characteristics
KPW.1-S1
HRW.1-S3
DSW.1-S4
Gram nature
Negative
Negative
Negative
Shape
Rod
Coccobacillary
Coccobacillary
Diffusible pigments
+
+
−
Motility
+
+
+
Citrate utilization
++
++
++
Lysine utilization
+
+
+
Ornithine utilization
+
+
+
Urease test
−
−
−
Phenylalanine test
NC
NC
NC
Nitrate reduction
NC
NC
NC
H2S production
+++
++
+
Production of acid by utilization of sugar*
(i) Glucose
−
−
−
(ii) Adonitol
−
−
−
(iii) Lactose
−
−
−
(iv) Arabinose
−
−
−
(v) Sorbitol
−
−
−
NC: not conclusive.
*The test attributed the change of the color of pH indicator by production of acid and gas when grown in presence of various sugars.