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Table 1 Structural parameters of cortex fruit tissue of apple and pear genotypes (mean ± standard deviation). A large amount of cells and voids were isolated and measured in 4 samples for each genotype. Different letters indicate differences at 5 % significance level

From: Automatic analysis of the 3-D microstructure of fruit parenchyma tissue using X-ray micro-CT explains differences in aeration

Parameter

‘Braeburn’

‘Kanzi’

‘Jonagold’

‘Conference’

Porosity (%)

18.4 ± 4.4 (ab)

12.1 ± 3.0 (b)

25.4 ± 2.6 (a)

5.7 ± 1.4 (c)

Cell volume (mm3)

0.0045 ± 0.0004 (a)

0.0030 ± 0.0007 (b)

0.0052 ± 0.0004 (a)

0.0023 ± 0.0007 (b)

Cell surface/volume (mm2 mm−3)

16.27 ± 0.93 (ab)

22.0 ± 4.3 (a)

18.9 ± 1.4 (a)

12.1 ± 1.6 (b)

Equivalent spherical diameter (μm)

196.6 ± 7.0 (a)

172 ± 13 (b)

209.7 ± 3.5 (a)

159 ± 17 (b)

Cell count (mm−3)

181 ± 20 (b)

293 ± 82 (ab)

142 ± 8 (b)

411 ± 107 (a)

Cell elongation (-)

1.52 ± 0.07

1.72 ± 0.18

1.54 ± 0.02

1.52 ± 0.06

Cell-to-void area (relative to cell surface) (%)

37.0 ± 4.0 (a)

34.4 ± 3.7 (ab)

41.7 ± 4.3 (a)

21.8 ± 9.9 (b)

Void volume (mm3)

0.0019 ± 0.0008 (b)

0.0006 ± 0.0004 (c)

0.0047 ± 0.0003 (a)

0.00005 ± 0.00001 (c)

Void surface/volume (mm2 mm−3)

66 ± 14 (bc)

104 ± 28 (b)

50.3 ± 4.1 (c)

204 ± 18 (a)

Void equivalent spherical diameter (μm)

100 ± 11 (b)

71 ± 16 (c)

139 ± 12 (a)

39.4 ± 1.8 (d)

Weighted void count (mm−3)

77 ± 24 (b)

220 ± 120 (b)

28.0 ± 2.5 (b)

540 ± 190 (a)

Void elongation (-)

2.36 ± 0.46

3.23 ± 0.85

2.07 ± 0.21

2.17 ± 0.14

Void shape factor

2.032 ± 0.029 (ab)

2.12 ± 0.15 (ab)

2.29 ± 0.11 (a)

1.94 ± 0.15 (b)

Branching number

950 ± 330 (c)

2410 ± 760 (b)

570 ± 230 (c)

5500 ± 3200 (a)

Total void path length (mm mm−3)

28 ± 13 (b)

84 ± 35 (a)

13.1 ± 7.5 (b)

100 ± 32 (a)

Void anisotropy (-)

0.241 ± 0.097 (b)

0.39 ± 0.13 (ab)

0.468 ± 0.033 (a)

0.226 ± 0.072 (b)

Fragmentation index (mm−1)

22.3 ± 7.0 (b)

44.9 ± 13.9 (b)

6.5 ± 5.4 (c)

82.3 ± 8.5 (a)

Oxygen diffusion coefficient (10−9 m2 s−1)a

1.73 ± 0.5 (b)

2.73 ± 1.59 (b)

10.1 ± 5.2 (a)

0.28 ± 0.15 (c)

  1. aHo et al. (2010); Verboven et al. (2008)