Table 1.

Vessel diameter, vessel density, pit area and pit area ratio of walnut branches, shallow roots, and deep roots

	Branch	Shallow root	Deep root
Mean vessel diameter (um)	64.71 ± 19.02 b	124.83 ± 32.19 a	153.01 ± 41.12 a
Vessel density (N mm−2)	60.75 ± 4.85 a	34.67 ± 3.51 b	36.67 ± 4.16 b
Vessel area ratio %	13.1 ± 0.56 c	18.2 ± 2.42 b	24.6 ± 2.49 a
Mean pit pore area (μm2)	2.88 ± 0.85 c	7.54 ± 2.38 b	16.32 ± 8.6 a
Max pit area (μm2)	4.25	12.69	30.49
Min pit area (μm2)	1.56	5.09	7.54
Pit area ratio (%)	14.3 ± 2.3 b	16.7 ± 2.6 b	29.1 ± 4.7 a

Means ± standard deviations (n = 3) are shown, and different letters refer to significant difference at P < 0.05