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Table 1 Effects of lead heavy metal exposure on growth parameters of E. crassipes seedlings

From: Lead heavy metal toxicity induced changes on growth and antioxidative enzymes level in water hyacinths [Eichhornia crassipes (Mart.)]

Pb Conc. (mg/L)

Root length (cm)

Shoot length (cm)

Growth rate inhibition (GRI)%

Root

Shoot

0.0

22.33 ± 0.81a*

23.83 ± 2.23a*

0.0

0.0

100

20.41 ± 1.67b

20.25 ± 0.83b

8.6

15.03

200

20.16 ± 0.76b

19.50 ± 0.56b

9.72

18.18

400

18.41 ± 0.91c

17.75 ± 1.38c

17.56

25.52

600

15.75 ± 1.26d

17.00 ± 0.76c

29.38

28.67

800

13.25 ± 1.25d

16.66 ± 1.08d

40.67

30.09

1000

09.83 ± 0.79e

13.25 ± 0.99e

55.98

44.34

  1. *Values are expressed as mean ± SE (n = 3), different letters in each column indicate significant difference at p < 0.05 levels.