Table 2. The accumulation amounts of phenanthrene (A) in ryegrass roots and shoots. A was estimated according to the following equation: A = C × M, where C (mg·kg⁻¹) is the concentration of phenanthrene in the root or shoot, and M (g·bottle⁻¹, on a dry weight basis) is the biomass of ryegrass root or shoot in each bottle. Higher A values indicate more phenanthrene present in the plants and higher risks of plant contamination.

	No inoculation		Inoculation of Ph6-gfp
Time (Days)	Root (μg·bottle−1)	Shoot (μg·bottle−1)	Root (μg·bottle−1)	Shoot (μg·bottle−1)
9	3.64 ± 0.24	0.39 ± 0.07	2.30 ± 0.08	0.27 ± 0.02
12	2.85 ± 0.01	0.55 ± 0.04	2.41 ± 0.07	0.31 ± 0.07
15	0.97 ± 0.02	0.50 ± 0.03	0.87 ± 0.15	0.17 ± 0.04