Response to Direct Selection against Drought Stress in Black Cumin (Nigella sativa L.)

Table 1

Comparison of black cumin seed germination and changes in related seedling growth parameters to nonprimed (control 1) and hydro-primed seeds (control 2) with PEG 6000-induced osmo-primed pretreated seeds for 12 h.

Priming (pretreatment)	Osmo stress (post-treatment)	Germination index (%)	Germination stress tolerance index (%)	Speed germination (%)	Final germination percentage (%)	Seedling vigor index (%)	Mean germination time (d)	Shoot length (cm)	Root length (cm)	Seedling length (cm)	Seedling fresh weight (mg)	Seedling dry weight (mg)
Nonprimed seeds	Control treatment 1	9.5	100.00	8.1	100.0	9.1	2.6	4.4	4.7	9.1	2.18	0.19
	−0.05 MPa of PEG	11.3	104.90	11.1	98.3	8.1	2.2	4.0	4.2	8.2	2.05	0.17
	−0.15 MPa of PEG	9.9	93.63	9.6	91.7	6.6	2.3	3.5	3.7	7.2	1.71	0.16
Hydro-primed seeds	Control treatment 2	10.0	98.53	9.4	96.7	8.4	2.4	4.3	4.3	8.7	1.99	0.19
	−0.05 MPa of PEG	8.1	88.24	7.1	90.0	6.0	2.7	3.5	3.1	6.6	1.67	0.16
	−0.15 MPa of PEG	4.6	54.41	4.5	65.0	3.3	3.2	2.4	2.7	5.1	1.24	0.14
−0.1 MPa of PEG	Control	12.6	106.86	13.3	100.0	8.8	1.9	4.3	4.6	8.8	1.96	0.17
	−0.05 MPa of PEG	11.2	103.92	11.0	100.0	8.4	2.2	4.3	4.1	8.4	1.98	0.18
	−0.15 MPa of PEG	7.8	76.47	7.8	80.0	4.2	2.6	2.6	2.7	5.3	1.44	0.14
−0.2 MPa of PEG	Control	14.0	107.84	15.5	96.7	8.1	1.5	4.0	4.5	8.4	2.14	0.18
	−0.05 MPa of PEG	11.7	101.96	11.9	95.0	7.3	2.0	4.0	3.7	7.7	2.10	0.20
	−0.15 MPa of PEG	8.4	82.84	8.9	90.0	3.8	2.7	2.2	2.0	4.2	1.16	0.14
−0.4 MPa of PEG	Control	10.1	99.51	9.6	98.3	7.9	2.4	3.8	4.3	8.0	1.91	0.19
	−0.05 MPa of PEG	9.3	90.69	9.4	95.0	5.4	2.5	3.1	2.5	5.7	1.31	0.17
	−0.15 MPa of PEG	5.7	64.22	5.8	75.0	3.4	3.0	2.2	2.3	4.5	1.17	0.15
LSD ()		0.3512	3.5135	0.3017	3.7232	0.2796	0.0767	0.1117	0.0635	0.1263	0.0422	0.0050

Significant at .