Table 1.

Main characteristics of moderately halophilic gram-negative members of the Halomonadaceaea

Feature H. elongata (357)H. subglaciescola (74)H. halodurans (115)H. halmophila (54)H. eurihalina (200, 266)H. halophila (269)
MorphologyRodsRodsRodsRodsShort rodsRods
Size (μm)ND0.5–1.1 × 5–100.4–0.6 × 1.5–2.00.3–0.6 × 0.9–1.30.8–1.0 × 2.0–2.50.5–0.7 × 1.5–2.0
PigmentationNoneCreamNoneCreamCreamCream
Motility+++++
Facultative anaerobe+
Oxidase+++++
NaCl range (%)3.5–200.5–20  3.5–20 0.5–205–20  2–30
NaCl optimum (%)3.5–8 ND8ND7.57.5
Temp range (°C)15–450–254–37ND15–4515–45
pH range5–95–95.5–8.5ND5–105–10
Acid production from:
 Arabinose+ND
 Glucose+++++
 Lactose+
 TrehaloseNDNDNDNDND
 Mannitol+
Hydrolysis of:
 Gelatind+
 CaseindND
 Starch
 Esculin+++
 Tween 80ND+
 DNAND++
H2S productionND++
Nitrate reduction++++
Nitrite reduction+
PhosphataseND++
Type strainATCC 33173UQM 2927ATCC 29686ATCC 19717ATCC 49339CCM 3662
HabitatSalternsAntarctic saline lakesEstuarine waterDead SeaSaline soils, salternsSaline soils
G+C content (mol%)60.560.9–62.963.263  59.1–65.766.7
Phylogenetic branchGamma Proteobacteria GammaProteobacteria Gamma Proteobacteria GammaProteobacteria Gamma Proteobacteria GammaProteobacteria
H. salina (53, 336)H. halodenitrificans (53, 159)H. variablis (53, 65)H. canadensis (128)H. israelensis (128)H. pantelleriense (290)Chromohalobacter marismortui (344)
Short rodsShort rodsCurved rodsRodsRodsRodsRods
0.7–0.8 × 2.0–2.50.5–0.9 × 0.9–1.20.5–0.8 × 1.0–3.0NDND0.4–0.7 × 1.4–2.60.6–1.0 × 1.5–4.0
Yellowish or creamCreamCreamWhiteCreamCream-pinkBrown-yellow
+ND++
+++
2.5–20  3–207–28 3–253.5–201.2–15 1–30  
55–9 10881010
15–405–3215–37 15–3015–4510–44 5–45  
6–10 ND6.5–8.45–9 5–9 7.5–11 5–10  
NDNDNDNDND+
NDNDNDND+
NDNDND+
NDNDNDNDND+
NDNDNDNDNDND
ND
NDNDND
ND
+NDNDND
NDNDNDND
NDNDNDNDND
+ND
++++++
+ND
NDNDNDND
ATCC 49509ATCC 13511DSM 3051ATCC 43984ATCC 43985DSM 9661ATCC 17056
Saline soils, salternsMeat-curing brinesGreat Salt LakeUnknown (contaminant)Dead SeaAlkaline saline lakeDead Sea, salterns
60.7–64.264–666157646562.1–64.9
Gamma Proteobacteria GammaProteobacteria GammaProteobacteria NDNDGammaProteobacteria Gamma Proteobacteria
  • a +, positive; −, negative; d, differs among strains; ND, not determined.