Table 1.

Copper concentrations in soil and plant, and caffeic acid contents in seven-month-old E. splendens plants harvested in the copper-contaminated site located at the Fuyang County of Zhejiang Province, China

Soil type	Copper in soil (mg/kg)	Copper in plant (mg/kg)		Caffeic acid in plant (mg/kg)
		Stem	Leaf	Stem	Leaf
Soil 1	4 464.30b	162.15a	230.57a	977.50a	2 244.37c
Soil 2	2 424.75c	105.68b	145.99b	1 062.25a	3 422.18a
Soil 3	22 507.20a	138.44a	108.34c	450.90b	2 915.32b

Different letters among the treatments indicate significant differences at P=0.05 as determined by the Duncan’s multiple range test