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

Table 2

Potential of shoot regeneration in petiole explants with different concentrations of additives in MS basal medium with 0.3 mgL⁻¹ BA and 0.01 mgL⁻¹ NAA.

Treatment mgL^−1		Number of buds per explant
Lactalbumin hydrolysis	0	2.12^a
	100	0.95^b
	300	0.20^c
	900	0.06^d
Peptone	0	1.85^a
	100	0.80^b
	300	0.31^c
	900	0.08^d
Yeast	0	1.95^a
	100	0.91^b
	300	0.28^c
	900	0.05^d
Coconut water	0%	2.05^a
	2%	2.58^b
	4%	2.03^a
	8%	1.91^a
Copper sulphate	0	2.00^a
	1.5	0.10^b
	3	0.05^bc
	6	0.01^bc
	12	0.00^c
Silver nitrate	0	1.89^a
	0.5	0.08^b
	2.5	0.02^b
	12.5	0.00^b

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