The concentration of Cr in plant tissues was affected by Cr and
Cr–B[a]P treatments and significant interactions were detected.
The concentrations of Cr in different plant tissues increased
with an increase in soil Cr and increased further with B[a]P
additions (Fig. 1a, b). When 50 and 100 mg Cr was added to
soil, the shoot Cr concentrations were 0.67 and 1.58 mg kg−1
respectively. This represents a 41 and 75 % increase in shoot
concentration of Cr relative to control treatments. The addition
of 1 mg kg−1 of B[a]P to 50 and 100 mg kg−1 of Cr significantly
(p