Initial size of shoots (mm)

DA-6 (mg・L⁻¹)

Primary roots No. per shoot

Secondary roots No. per Shoot

Total Root tips No. per shoot

15

0.00

2.00 ± 0.30a*

0.20 ± 0.13b

2.20 ± 0.39b

15

0.08

1.90 ± 0.31a

4.30 ± 0.90a

6.20 ± 0.92a

15

0.16

2.40 ± 0.48a

3.00 ± 0.84a

5.40 ± 1.07a

15

0.32

2.20 ± 0.51a

0.40 ± 0.22b

2.60 ± 0.67b

15

0.64

0.70 ± 0.40b

0.00 ± 0.00b

0.70 ± 0.40b

25

0.00

2.30 ± 0.21c

2.40 ± 0.78b

4.70 ± 0.87b

25

0.08

3.10 ± 0.28c

3.40 ± 0.58b

6.40 ± 0.73b

25

0.16

4.20 ± 0.44b

8.40 ± 0.83a

12.60 ± 0.99a

25

0.32

5.90 ± 0.35a

0.30 ± 0.10c

6.20 ± 0.44b

25

0.64

5.20 ± 0.47ab

0.10 ± 0.32c

5.30 ± 0.45b