. 2018 Dec 18;179(2):369–381. doi: 10.1104/pp.18.00953

Table 9. Differences in photosynthetic parameters between mesophyll and whole-leaf average in the Zn-deficient treatment.

These differences were in response to zinc deficiency stress in soybean leaves (20-nm residue from chemicals and water) compared to Control (340 nm Zn) for six weeks. Three areas of mesophyll and three veins were chosen from every leaf for quantification (n = 4–6 leaves per treatment). Mann-Whitney U test statistics were used for significant differences. The Z value represents standardized value corrected for the presence of ties.

Parameter	Tissue	n	Median	Mean Rank	Sum of Ranks	U	Z	P
M_o	Whole leaf	4	1.185	3.50	14	4	−2.36646	0.018
M_o	Mesophyll	12	1.335	10.17	122	4	−2.36646	0.018
Φ_Po	Whole leaf	4	0.68505	12.00	48	38	1.63712	0.102
Φ_Po	Mesophyll	12	0.6461	7.33	88	38	1.63712	0.102
Ψ_ET2o	Whole leaf	4	0.47785	11.75	47	37	1.51585	0.130
Ψ_ET2o	Mesophyll	12	0.4288	7.42	89	37	1.51585	0.130