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 3

Effects of different concentrations of DA-6 on the growth of tetraploid 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	32.50 ± 2.40^b**	247.80 ± 17.76^c	50.20 ± 4.84^b	1215.99 ± 48.50^d	2.30 ± 0.45^c	41.40 ± 4.22^b	86.10 ± 15.67^bc	29.98 ± 3.36^b
0.08	34.70 ± 3.65^ab	453.30 ± 49.96^b	103.90 ± 23.77^b	1858.95 ± 29.32^c	4.30 ± 0.42^c	61.80 ± 6.58^a	115.10 ± 12.36^b	31.10 ± 5.05^b
0.16	46.10 ± 5.41^a	699.10 ± 86.03^a	317.60 ± 59.31^a	2081.84 ± 32.95^b	16.50 ± 1.48^a	54.90 ± 9.08^ab	170.00 ± 26.90^a	82.00 ± 12.76^a
0.32	36.40 ± 4.46^ab	339.80 ± 73.63^bc	68.50 ± 14.07^b	2243.96 ± 38.58^a	11.40 ± 1.00^b	12.10 ± 1.37^c	43.30 ± 7.22^c	35.36 ± 5.30^b

∗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.