Table 2.

Effects of melatonin on relative chlorophyll content of cotton seedling under salt stress

Treatment	0d	3d	6d	9d	12d
CK	37.10 ± 1.03 a	43.10 ± 1.53 a	47.22 ± 2.36 a	49.30 ± 2.4 a	49.30 ± 0.85 a
S	37.20 ± 1.40 a	38.04 ± 1.46 d	39.90 ± 1.73 d	42.10 ± 2.22 c	40.20 ± 1.81 c
S + MT50 S + MT100 S + MT200 S + MT500	37.02 ± 1.45 a 37.10 ± 1.10 a 37.10 ± 1.12 a 37.26 ± 1.14 a	38.70 ± 0.69 cd 40.22 ± 0.74 bc 41.70 ± 1.48 ab 39.84 ± 1.01 bc	41.90 ± 1.04 cd 43.50 ± 1.09 bc 45.34 ± 1.45 ab 42.90 ± 1.96 bc	43.32 ± 1.78bc 45.02 ± 1.7 bc 46.02 ± 1.82 b 44.46 ± 1.12bc	44.12 ± 1.48 c 45.22 + 1.71 bc 46.82 + 1.56 b 44.84 + 1.33 bc

Control (CK) and salt-treated (S) plants were sprayed with distilled water, while S + MT50, S + MT100, S + MT200, and S + MT500 plants were sprayed with 50, 100, 200, and 500 μM MT, respectively. Different lowercase letters indicate significant differences at the p ≤ 0.05 level