DA-6 (mg・L⁻¹)

Diploid

Triploid

Tetraploid

Height (mm)

Root tips No.

Height (mm)

Root tips No.

Height (mm)

Root tips No.

0.00

43.80a*

6.40c

39.00b

12.33b

40.50a

4.30b

0.16

58.50a

18.75bc

44.67ab

16.50ab

48.50a

13.50ab

0.32

67.25a

38.00ab

52.50a

20.50ab

43.50a

15.00ab

0.64

64.00a

44.50a

42.00ab

22.00a

64.00a

24.50a

1.28

62.67a

36.00ab

45.80ab

12.50b

55.50a

18.00ab