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 2
Effects of different concentrations of DA-6 on the growth of triploid 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
35.40 ± 4.52a**
174.40 ± 24.65b
27.20 ± 4.38c
1310.42 ± 88.11b
1.10 ± 0.18b
32.75 ± 2.72a
35.50 ± 5.18b
22.21 ± 3.43c
0.08
36.10 ± 3.26a
186.10 ± 19.78b
76.10 ± 12.14b
1719.01 ± 54.83a
7.30 ± 1.14a
29.10 ± 3.53a
49.60 ± 8.27b
78.58 ± 10.79a
0.16
45.10 ± 4.70a
466.80 ± 19.81a
160.70 ± 16.10a
1818.27 ± 12.27a
8.00 ± 1.01a
21.20 ± 2.30b
81.20 ± 15.26a
57.24 ± 7.36b
0.32
36.20 ± 5.45a
478.60 ± 14.67a
84.10 ± 4.44b
1820.79 ± 18.77a
9.70 ± 0.73a
6.20 ± 0.55c
40.60 ± 5.67b
33.61 ± 1.74c
Values for 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.