Research Article

Production of Extracellular Polymeric Substances by Halophilic Bacteria of Solar Salterns

Table 7

Morphological and physiological characteristics of the selected EPS producing halophilic bacteria isolated from solar salterns of India.

CharacterBacterial isolates
JS504JS802JS803JS904JW302JW307KS1101KS1805KW203VW301

Morphological characters
 Colony morphologyCream, circularWhite, circularCream, circularCream, circularTransparent, circularCream, circularCream, circularWhite, circularWhite, circularCream, circular
 Gram nature++
 Cell shapeRodRodRodRodRodRodRodRodRodRod
 Cell arrangementSingleSingleSingleSingleSingle, chainsSingle, chainsSingle, chainsSingleSingle, clumpedSingle, chains
 Motility++++++++
 Pigmentation
 Endospore formation+
Physiological characters
 pH range for growth5–115–115–115–115–115–115–115–115–115–11
 pH optimum for growth11989111111889
 Temp. range for growth (°C)27–4027–4027–4027–4027–4027–4022–4027–4027–4022–40
 Temp. optimum for growth (°C)32373732323232323732
 NaCl range for growth (%)0–150–200–150–200–150–200–202.5–152.5–150–20
 NaCl optimum for growth (%)51010510557.5105
 Growth on King’s B medium++++++++++
 Growth on McConky agar
 Tentative identityAlteromonas Halomonas Halomonas Aidingimonas Halomonas Halomonas Halomonas Chromohalobacter Bacillus Halomonas

CharacterBacterial isolates
VW402SUR108SUR301SUR302SUR303SUR307SUR309SUR310SUR202SUR201

Morphological characters
 Colony morphologyCream, circularCream, circularWhite, gummyTransparent, circularFlat, reddish-pinkCream, circularCream, circularCream, circularCream, circularCream, circular
 Gram nature+
 Cell shapeRodRodRodRodCocciRodRodRodRodRod
 Cell arrangementSingleSingleSingleSingleSingle, clumpedSingleSingleSingleSingleSingle
 Motility++++
 PigmentationPink
 Endospore formation
Physiological characters
 pH range for growth5–115–115–115–115–115–115–115–115–115–11
 pH optimum for growth97771177779
 Temp. range for growth (°C)27–4027–4027–4032–4532–4522–4032–4022–4522–4532–45
 Temp. optimum for growth (°C)32323732372732272732
 NaCl range for growth (%)0–150–152.5–152.5–152.5–150–200–200–200–200–15
 NaCl optimum for growth (%)52.557.552.57.52.557.5
 Growth on King’s B medium++++++++++
 Growth on McConky agar
 Tentative identityHalomonas Halomonas Chromohalobacter Halomonas Salinicoccus Halomonas Halomonas Halomonas Halomonas Halomonas