An Uncommon Plant Growth Regulator, Diethyl Aminoethyl Hexanoate, Is Highly Effective in Tissue Cultures of the Important Medicinal Plant Purple Coneflower (Echinacea purpurea L.)
Table 4
Effects of different concentrations of DA-6 on the growth of hexaploid buds*.
Concentration of DA-6 (mg/L)
Plant height (mm)
Weight per plant (mg)
Root weight per plant (mg)
Diameter of thickest root (μm)
Total root no.
Length of primary root (mm)
Total root length (mm)
Root/top ratio
0
15.60 ± 1.71ab**
212.70 ± 17.38ab
63.20 ± 12.47b
1420.00 ± 62.91d
2.30 ± 0.37ab
27.88 ± 3.02bc
30.30 ± 4.67ab
42.93 ± 8.13b
0.08
20.40 ± 3.28a
279.40 ± 42.81a
116.60 ± 65.02a
1650.09 ± 98.80c
3.70 ± 1.09a
44.77 ± 5.12a
56.00 ± 11.65a
75.15 ± 10.26a
0.16
14.10 ± 2.69ab
170.70 ± 30.17b
53.40 ± 15.43b
2495.55 ± 81.22a
2.20 ± 1.02ab
36.25 ± 8.50ab
36.70 ± 12.13ab
54.52 ± 10.70ab
0.32
11.20 ± 1.91b
143.90 ± 25.62b
39.40 ± 11.01b
2180.24 ± 66.53b
0.90 ± 0.18b
17.75 ± 2.54c
14.40 ± 3.81b
36.18 ± 8.36b
Values of plant height, weight per plant, root weight per plant, diameter of thickest root, total root no., length of primary root, total root length, and root/top ratio are expressed as the mean ± SD. Data in the same column followed by different letters are significantly different by Duncan’s test at P < 0.05.