Table 1.

Classification of actinomycetes based on their ability to grow under different conditions

Group of actinomycetes	Growth in neutral habitat	Growth in saline habitat	Growth in alkaline habitat
I (all habitats)	+	+	+
II (two habitats)
IIa	+	+	−
IIb	+	−	+
IIc	−	+	+
+ means growth; − means no growth