Table 4 Effects of exogenous melatonin on mesophyll and vascular bundle anatomical structure in cotton seeding under salt stress

168.33 ± 9.95 c

241.43 ± 9.58 a

189.75 ± 3.43 b

67.46 ± 3.75 c

96.23 ± 3.98 a

79.22 ± 1.26 b

69.80 ± 3.58 b

113.43 ± 3.10 a

73.73 ± 4.16 b

0.88 ± 0.09 b

0.97 ± 0.10 b

1.14 ± 0.038 a

0.37 ± 0.02 b

0.41 ± 0.05 ab

0.43 ± 0.01 a

0.41 ± 0.004 b

0.46 ± 0.016 a

0.41 ± 0.008 b

14.33 ± 1.55 c

22.67 ± 1.11 a

19.75 ± 0.54 b

12.50 ± 0.47 c

16.26 ± 0.70 a

13.75 ± 0.80 b

56.44 ± 1.09 c

67.44 ± 2.90 b

91.17 ± 3.10 a

57.31 ± 1.51 c

69.49 ± 5.68 b

81.98 ± 6.02 a

220.71 ± 11.56 c

263.40 ± 9.25 b

413.46 ± 10.41 a

0.46 ± 0.03 c

0.90 ± 0.08 b

1.55 ± 0.03 a

0.91 ± 0.03 c

1.70 ± 0.17 b

2.44 ± 0.13 a