Effects of Sucrose and Other Additives on In Vitro Growth and Development of Purple Coneflower (Echinacea purpurea L.)

Table 3

Shoot regeneration in callus explants with different concentrations of proline in MS basal medium with 0.1 mgL⁻¹ BA.

Proline mgL^−1	Number of buds per explant
0	0.00^a
150	5.09^b
450	11.9^c
1000	16.7^d

∗Means followed by the same lower case letters in each column are not significantly different at 5% level in Duncan’s Multiple Range Test.