Table 3.

Ecological, plant growth promoting related enzymatic activities and indolacetic acid production in selected Arthrobacter strains.

PPB traits	Cellulase	Pectinase	Xylanase	Tween 20	Tween 80	Cellulose production	Growtn in N free medium	C source Galactose	C source Glucose	C source Manose	C source Xylose	Phosphate solubilization	IAA production	Siderophore production
Arthrobacter strains
AFG 15.2	−	+	+	−	+	+	−	+	+	+	+	+	0.034	−
AFG 3.2	+	−	+	+	+	+	−	+	+	w	−	−	0.034	+
AFG 16.1	−	+	+	+	+	+	+	+	+	+	+	+	0.02	+
AFG 7.2	+	+	+	w	−	+	+	+	+	+	+	−	0.308	−
AFG 20	−	+	+	−	+	+	−	+	+	+	+	+	0.042	+

(+) positive, (−) negative and (w) weak. Indolacetic acid production is expressed in µg ml⁻¹.