Effect of Dissolved Oxygen and Chemical Scarification on Andrographis paniculata Seed Germination in Macrobubble Conditions

Table 1

Comparison parameter of means and variation for germination of dissolved oxygen concentration treatment.

Dissolved oxygen (DO)	Germination percentage (GP ± SD)	Germination energy (GE ± SD)	No. of secondary seedling roots (SSR ± SD)	No. of seedling cotyledon (SC ± SD)
Control (NB)	2.33^d ± 0.58	0.58^d ± 0.14	1.33^c ± 1.15	0.00^c ± 0.00
6 mg·L^−1	6.67^c ± 0.58	1.67^c ± 0.14	5.00^bc ± 2.00	2.50^bc ± 0.71
7 mg·L^−1	12.00^b ± 2.00	3.00^b ± 0.50	9.33^b ± 2.52	5.50^a ± 0.71
8 mg·L^−1	14.33^b ± 2.08	3.58^b ± 0.52	10.33^ab ± 3.21	5.00^ab ± 1.41
9 mg·L^−1	26.33^a ± 1.53	6.58^a ± 0.38	15.67^a ± 1.53	2.00^bc ± 0.00

Control was conditional on nonmacrobubble aeration with dissolved oxygen (5.0 mg·L⁻¹).