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

Table 2

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 24 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	100.98	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	13.5	100.00	15.0	100.0	6.6	1.7	3.4	3.3	6.6	1.91	0.18
	−0.05 MPa of PEG	11.6	103.43	11.9	100.0	7.1	2.1	3.7	3.4	7.1	1.93	0.19
	−0.15 MPa of PEG	6.0	73.04	6.0	90.0	4.2	3.2	2.4	2.3	4.7	1.30	0.14
−0.1 MPa of PEG	Control	9.3	96.57	8.3	96.7	6.3	2.6	3.2	3.3	6.6	1.86	0.19
	−0.05 MPa of PEG	14.5	108.82	16.1	98.3	6.3	1.4	3.4	3.0	6.4	1.89	0.21
	−0.15 MPa of PEG	7.6	79.90	8.0	95.0	4.6	2.9	2.6	2.3	4.9	1.07	0.22
−0.2 MPa of PEG	Control	12.5	103.43	13.5	96.7	6.4	1.8	3.2	3.4	6.6	2.11	0.15
	−0.05 MPa of PEG	10.5	94.12	11.2	95.0	8.2	2.3	4.5	4.2	8.7	2.21	0.22
	−0.15 MPa of PEG	7.0	81.37	6.7	95.0	3.9	3.0	2.0	2.1	4.1	1.36	0.18
−0.4 MPa of PEG	Control	11.2	97.55	12.0	96.7	6.3	2.2	3.3	3.3	6.6	1.71	0.17
	−0.05 MPa of PEG	9.1	91.18	9.0	95.0	7.7	2.6	4.2	4.0	8.1	1.94	0.21
	−0.15 MPa of PEG	7.5	81.86	7.8	95.0	3.8	3.0	1.9	2.1	4.0	1.13	0.18
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 .