There was a significant positive linear correlation between B[a]P
concentrations in tissues of T. patula and B[a]P spiked in soils
(P < 0.001), which was consistent with Borneff et al. [45], who
pointed out that the content of B[a]P in carrot epidermis was correlated
with soil B[a]P rates. Other work showed Phe and Pyr in roots
and shoots of 12 plant species increased with the increment of their
soil concentrations [20], and Pyr in roots and shoots of white clover
was also proportional to the concentrations in the growing media
[30]. However, Xing et al. found that only root B[a]P concentrations
were positively correlated with soil rates [46].