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Table 2 Effects of melatonin on relative chlorophyll content of cotton seedling under salt stress

From: Exogenous melatonin improves the salt tolerance of cotton by removing active oxygen and protecting photosynthetic organs

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

  1. 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