Table 1. Effect of different concentrations of BA and TDZ on the frequency of shoot induction and average number of shoots from normal and preconditioned CN explants of P. pinnata (after 4 weeks of culture) on MS media.

 Plant growth
Regulators
(mg ^l-1)

% Shoot Induction
(Mean ± S. E.)

Mean No.
of shoots/ explant

% Shoot Induction
(Mean ± S. E.)

Mean No.
of shoots/
explant

      BA          TDZ

 Normal CN explant

Preconditioned CN explant

Control

0.0

0.0

0.0

0.0

   0.5

--

40± 1.15^f

3.4 ± 0.45^e

74 ± 2.14^e

   7.5 ± 1.3^e

1

--

59 ± 1.70^b

7.3 ± 0.92^b

85 ± 2.45^b

12.3 ± 2.^b

2

--

50 ± 1.44^c

5.7 ± 1.22^c

80 ± 2.31^c

9.1 ± 1.6^d

3

--

45 ± 1.30^c

4.5 ± 0.62^d

76 ± 2.19^d

8.5 ± 1.3^e

--

   0.5

48 ± 1.39^d

4.3 ± 0.70^d

80 ± 2.3^c

10.5 ± 2.5^c

--

1

64 ± 1.85^a

8.6 ± 0.29^a

90 ± 2.60^a

18.4 ± 3.1^a

--

2

58 ± 1.67^b

6.2 ± 1.26^c

85 ± 2.45^b

12.6 ± 2.2^b

--

3

48 ± 1.39^d

5.7 ± 1.48^c

78 ± 2.25^d

 9.5 ± 2.3^d