Table 2.

Plant height and yield related traits of wheat as affected by Cu-NPs under drought.

Treatments		Parameters
Drought	Cu-NPs	Plant height	Spike length	Number of Grains/Spike	1000-grain weight	Biological yield	Grain yield	Harvest index
D0 = Control	T0	66.12b	13.4ab	36.66a	29.41b	16.77b	10.56b	52.51b
	T1	68.13a	13.56a	35.33b	30.26a	17.2a	11.71a	55.46a
	T2	65.43bc	13.16b	34.66c	28.81c	15.52bc	10.41c	50.24c
	T3	63.76d	13.06c	34 0.56c	28.41c	15.2c	10.26c	49.54d
D1 = Drought at tillering	T0	65.16b	12.96b	35.66a	28.22b	15.88b	9.17b	53.45a
	T1	65.5a	13.53a	34.33b	29.07a	16.3a	10.32a	50.34b
	T2	64.03c	12.83b	33.66c	27.62c	14.6bc	9.02b	48.12c
	T3	63.43d	12.66c	33.0 cd	27.22d	14.38c	8.87c	47.42d
D2 = Drought at anthesis	T0	61.76b	12.8b	35.06a	27.01b	14.78b	7.96b	50.5 7a
	T1	62.43a	13.36a	33.66b	27.86a	15.26a	9.11a	47.45b
	T2	59.73c	12.53c	33.21bc	26.41c	13.53c	7.81c	45.23c
	T3	59.26c	12.26d	32.33c	26.0 cd	13.28c	7.66d	44.53d

T₀, T₁, and T₂, T₃ denotes control, 300 mg L⁻¹, 700 mg L⁻¹, and 950 mg L⁻¹ Cu-NPs, respectively. The means that are sharing similar letter case does not exhibit significant differences at 5% level of probability.