Characterization of Halorubrum sfaxense sp. nov., a New Halophilic Archaeon Isolated from the Solar Saltern of Sfax in Tunisia

Table 2

Differential characteristics of ETD6 and Halorubrum xinjiagense. Strains: 1, strain ETD6 (tested in this study); 2, Halorubrum xinjiangenese AS 1.3527^T [35]. +, Positive; −, negative; ND, no data available.

	1	2
Characteristics:
Morphology	Pleomorphic	Rods
Motility	+	+
Gram stain reaction	−	−
NaCl range (%)	15–35	11.8–30.1
NaCl optimum (%)	25	17.8–19.7
Temperature range (°C)	20–55	10–54
Temperature optimum (°C)	37	40
pH range	6.0 –9.0	6.0–10
pH optimum	7.4	7–7.5
Doubling time (h)	8.4	ND
G+C content (%)	65.1	68
Hydrolysis of starch	+	–
Hydrolysis of casein	–	ND
Urease	–	ND
Use of substrates:
Starch	+	ND
Glycerol	–	ND
Galactose	–	–
Sucrose	–	+
Xylose	+	ND
Mannose	+	ND
Arabinose	+	ND
Indole	–	–
Nitrate reduction	+	–
Oxidase	–	+
ONPG	+	ND