Table 1.

Effect of growth regulators and thermal regimes on superoxide dismutase (SOD), catalase (CAT), chlorophyll contents and malondialdehyde contents (nmol g⁻¹ FW) in glass house conditions.

Thermal regimes	Regulators	SOD	CAT	MDA (nmol g−1 FW)	Chlorophyll a	Chlorophyll b
32/20 °C	Control	39.21 c ± 0.88	56.37 d ± 2.65	28.69 a ± 1.6	1.49 b ± 0.80	0.50 b ± 0.30
	H2O2 (30 ppm)	52.59 a ± 0.50	139.13 a ± 7.60	22.20 b ± 1.1	1.70 a ± 1.20	0.55 a ± 0.32
	SA (70 ppm)	40.46 c ± 0.90	59.50 d ± 3.35	29.97 a ± 1.8	1.53 b ± 0.93	0.49 b ± 0.28
	MLE (30 times diluted)	51.57 a ± 0.79	84.90 b ± 5.91	23.50 b ± 1.2	1.51 b ± 1.26	0.50 b ± 0.26
	ASA (70 ppm)	45.94 b ± 0.79	72.84 c ± 3.98	24.85 bc ± 1.3	1.50 b ± 1.16	0.49 b ± 0.24
45/30 °C	Control	58.82 d ± 1.20	87.33 e ± 4.57	51.16 a ± 2.6	0.89 c ± 0.56	0.33 c ± 0.19
	H2O2 (30 ppm)	99.24 a ± 2.55	300.31 a ± 16.44	30.88 d ± 1.7	1.34 a ± 0.83	0.45 a ± 0.21
	SA (70 ppm)	68.93 c ± 0.55	142.17 d ± 7.53	48.06 b ± 2.5	0.90 c ± 0.60	0.32 c ± 0.22
	MLE (30 times diluted)	88.09 b ± 2.08	249.97 b ± 13.18	34.58 c ± 1.6	1.15 b ± 0.70	0.41 b ± 0.25
	ASA (70 ppm)	86.38 b ± 1.20	214.03 c ± 11.80	34.45 c ± 1.7	1.14 b ± 0.66	0.40 b ± 0.22
38/24 °C	Control	42.90 d ± 0.87	60.83 e ± 3.89	41.51 a ± 2.2	1.40 b ± 0.78	0.44 b ± 0.23
	H2O2 (30 ppm)	59.34 a ± 1.04	147.74 a ± 8.18	30.01 d ± 1.6	1.62 a ± 0.91	0.49 a ± 0.27
	SA (70 ppm)	47.14 c ± 1.05	67.91 d ± 4.10	38.01 b ± 1.9	1.44 b ± 0.82	0.42 b ± 0.18
	MLE (30 times diluted)	59.00 a ± 0.97	94.55 b ± 5.85	32.19 c ± 1.6	1.43 b ± 0.76	0.43 b ± 0.21
	ASA (70 ppm)	53.16 b ± 0.94	84.41 c ± 5.36	32.46 c ± 1.7	1.39 b ± 0.85	0.43 b ± 0.24
	LSD	2.83	5.31	1.57	0.051	0.023

Mean of three replications (n = 3) ± SE and variants having same alphabets are not statistically significant at P˂ 0.05. Main factors and interaction are significant at P˂ 0.01. By using the LSD of the interaction between growth regulators and thermal regimes, lettering is done separately for each thermal regime.