Table 2.

Variance analysis of the effect of drought stress on enzymatic activity of antioxidant enzymes, and quantity of essential oil from different lavender genotypes.

Mean of squares
Traits	Replications (R)	Genotype (G)	Drought (I)	Genotype × Drought (GI)	Error	CV (%) (coefficient of variation)
df (degree of freedom)	2	2	3	6	22
Shoot fresh mass	4.13ns	695.93**	867.16**	19.28*	7.41	8.83
Shoot dry mass	0.50ns	33.47**	46.01**	1.33*	0.39	9.38
Leaf relative content	66.72ns	1291.59**	3259.65**	55.24*	17.16	8.34
Leaf proline content	0.069ns	7.57**	10.21**	0.30**	0.017	4.50
Antioxidant activity	31.31ns	249.69**	1688.86**	275.96**	15.55	8.46
Soluble sugar	14.35ns	242.50**	1273.67**	35.76ns	14.66	9.33
Total phenol	0.007ns	0.26**	0.58**	0.095**	0.018	7.52
Flavonoid	0.008ns	0.114**	0.033**	0.0002ns	0.0037	6.08
SOD1	1800.30ns	8962.44**	20,217.54**	2221.57*	633.96	10.69
POX2	363.15ns	4441.35**	14,216.52**	1111.11*	308.88	8.05
APX3	6058.62ns	24,763.46**	20,851.38**	164.69ns	1531.07	16.64
CAT4	1750.33ns	3301.10**	54,584.62**	8085.51**	493.20	6.40
MDA5	2.90ns	22.45**	61.41**	4.40*	1.48	15.68
Essential oil rate (%)	0.032ns	0.348**	1.17**	0.194**	0.013	14.32
EO6 yield g/plant	0.00028ns	0.00031*	0.0013**	0.00026**	0.000062	16.92

1. SOD, Superoxide dismutase; 2. POX, Peroxidase; 3. APX, Ascorbate peroxidase; 4. CAT, Catalase; 5. MDA, Malondialdehyde; 6. EO, essential oil.

^nsNo significant difference.

*Significant difference at p < 0.5.

**Significant difference at p < 0.1.