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Table 1 Comparison of anatomical features of the leaves of the four Artemisia species

From: Artemisia dominant species succession relating to the soil moisture decrease in abandoned land of the Loess Plateau (China): comparative study of drought-adaptive characteristics

 

A. sacrorum

A. scoparia

A. giraldii

A. annua

Types of leaf cells

Transitional form

Isolateral leaf

Isolateral leaf

Bifacial leaf

Leaf thickness (μm)

189.8 ± 1.3b

206.0 ± 2.1a

136.7 ± 1.5c

90.6 ± 1.0d

Epidermal thickness (μm)

    

 Upper

23.6 ± 0.8a

17.2 ± 0.9b

16.6 ± 0.8b

12.7 ± 1.3c

 Lower

15.9 ± 1.4a

15.7 ± 0.4a

13.8 ± 0.6b

11.6 ± 0.9c

Thickness of palisade parenchyma (μm)

    

 Upper

77.1 ± 0.5a

60.2 ± 0.1b

38.4 ± 0.9c

28.0 ± 0.5d

 Lower

–

47.6 ± 0.4a

27.8 ± 1.1c

–

Thickness of spongy parenchyma (μm)

60.9 ± 1.7a

65.5 ± 1.5a

40.0 ± 0.8b

31.0 ± 0.9c

TPP/TSP

1: 0.79 ± 0.02b

1:0.61 ± 0.05a

1:0.60 ± 0.04a

1:1.11 ± 0.02c

Thickness of cuticles (μm)

    

 Upper

7.5 ± 0.9a

3.7 ± 0.7b

3.7 ± 0.4b

3.1 ± 0.3bc

 Lower

3.3 ± 0.3a

2.9 ± 0.5ab

2.8 ± 0.4ab

2.7 ± 0.2b

TPP  %

40.1 ± 1.1 %c

52.6 ± 1.1 %a

49.4 ± 0.8 %ab

29.6 ± 1.5 %d

TSP  %

32.0 ± 1.2 %b

32.5 ± 0.8 %b

30.2 ± 0.9 %b

38.6 ± 1.0 %a

  1. Values are presented as mean ± SD, N = 6. Different letters in the same row indicate significant difference at P < 0.01
  2. TPP thickness of palisade parenchyma, TSP thickness of spongy parenchyma