Table 1.

Effect of different concentration of CuO-NPs on N6 medium for frequency of callus induction.

O. sativa L. varieties	Control	CuO-NPs (1 mg/L)	CuO-NPs (5 mg/L)	CuO-NPs (10 mg/L)	CuO-NPs (15 mg/L)	CuO-NPs (20 mg/L)
Basmati 2000	27.00 ± 1.1b (46%)	34.00 ± 1.3e (68%)	24.00 ± 2.9b (48%)	39.00 ± 2.7b (78%)	23.00 ± 4.7a (54%)	21.00 ± 1.1a (42%)
Basmati 370	21.00 ± 3.3a (42%)	37.00 ± 3.1e (74%)	26.00 ± 2.4b (52%)	43.00 ± 3.9d (86%)	22.00 ± 3.7a (44%)	19.00 ± 1.3a (38%)
Basmati 385	31.00 ± 1.7d (62%)	40.00 ± 2.2e (86%)	32.00 ± 3.6d (64%)	45.00 ± 1.1d (90%)	36.00 ± 2.5d (72%)	19.00 ± 2.2a (38%)
Super Basmati	29.00 ± 2.2d (58%)	46.00 ± 2.2f (92%)	33.00 ± 4.1c (66%)	47.00 ± 1.4d (94%)	35.00 ± 1.1d (70%)	27.00 ± 2.8d (54%)

Alphabets (a,b,c,d,e,f) on values represents LSD at p < 0.05.