Table 3.

Concentrations of photosynthetic pigments (in μmol m⁻²; Chl a, Chl b, neoxanthin, lutein, β-carotene, and V+A+Z) and Chl a/Chl b and Z+A/(V+A+Z) ratios in basal and distal parts of Fe-deficient peach tree leaves either not fertilized or 8 weeks after the first treatment with 2 mM FeSO₄ and 0.1% surfactant (Fe-fertilized).

	Basal leaf part		Distal leaf part
	Not	Fe-	Not	Fe-
	fertilized	fertilized*	fertilized	fertilized
Chl a	73.6 ± 4.0a	77.8 ± 6.5a	82.4 ± 3.4B	197.7 ± 7.7A
Chl b	20.1 ± 1.4a	25.0 ± 3.2a	24.5 ± 1.8B	63.3 ± 2.9A
Chl total	93.7 ± 5.2a	102.8 ± 8.5a	106.9 ± 4.9B	261.0 ± 10.5A
Neoxanthin	6.3 ± 0.3a	6.5 ± 0.5a	7.3 ± 0.3B	13.7 ± 0.7A
Lutein	14.7 ± 0.7a	15.5 ± 1.0a	17.2 ± 0.7B	31.6 ± 1.8A
β-carotene	14.7 ± 0.6a	15.0 ± 1.1a	17.1 ± 0.7B	31.3 ± 1.3A
(V+A+Z)	20.2 ± 1.1a	18.7 ± 1.6a	21.3 ± 1.2B	32.7 ± 2.3A
Chl a/Chl b	3.9 ± 0.1a	3.5 ± 0.2a	3.7 ± 0.1B	3.2 ± 0.1A
(Z+A)/(V+A+Z)	0.44 ± 0.04a	0.43 ± 0.05a	0.40 ± 0.04B	0.24 ± 0.04A

A second treatment was done at week 4. Data are means ± SE (n = 8 trees, 4 each in 2010 and 2011; each sample was composed of 4 leaf disks). Values followed by the same letter within the same row were not significantly different (Duncan test) at the p ≤ 0.05 level. Columns with data corresponding to Fe-fertilized leaves are labeled “Fe-fertilized” in case of the treated (distal) leaf area and “Fe-fertilized

^*” in case of the (basal) untreated area.