TABLE 3.

Growth of Rhodococcus sp. strain RHA1 and three mutant strains on different substrates^a

Growth substrate (concn)b	Growth ofc:
	WT RHA1	RHA1_001 (paaN)	RHA1_002 (paaF)	RHA1_003 (paaR)
PAA (15 mM)	+	−	+	+
Styrene (v)	+	+	+	+
Ethylbenzene (v)	+	+	+	+
Benzene (v)	+	+	+	+
Phenylacetaldehyde (v)	+	−	(+)	+
Biphenyl (v)	+	+	+	+
Mandelate (130 mM)	+	+	+	+
Benzoate (20 mM)	+	+	+	+
Phthalate (20 mM)	+	+	+	+
3-Hydroxyphenylacetate (20 mM)	+	+	+	+
4-Phenylbutyrate (30 mM)	+	−	+	+
Phenylpyruvate (20 mM)	+	−	+	+
l-Phenylalanine (12 mM)	+	−	+	+
2-Phenylethylamine (3 mM)	+	−	−	+
2-Phenylethanol (6.2 mM)	+	−	(+)	+

^aAll tests were repeated three times.

^bv, volatile compounds added as vapors, according to Materials and Methods;

^c+, growth; −, no growth; (+), poor growth (only isolated colonies grew from streak).