Table 2.

Values document glutathione gold particle density per μm² in different cell compartments of older (O) and younger leaves (Y; LC = center of the leaf, LA = leaf apex, LB = leaf base, LE = leaf edge) of Arabidopsis thaliana Col-0. Significant differences between the samples are indicated by different lowercase letters, samples which are significantly different from each other have no letter in common. P < 0.05 was regarded as significant as analyzed by the Kruskal–Wallis test followed by post hoc comparison according to Conover. Statistical differences were calculated for each cell compartment in the different leaf areas. Different lower case letters indicate significant differences from either older or younger leaves. n > 20 for peroxisomes and nuclei, n > 60 for other cell structures.

	Labeling density (gold particles per μm2)
	OLC	OLA	OLB	OLE	YLC	YLA	YLB	YLE
Mitochondria	601.12a	533.67a	376.90b	594.88a	442.12a	362.39b	330.61c	383.85ab
Chloroplasts	46.90b	38.99c	47.28b	61.49a	43.90a	40.75a	34.76a	43.88a
Nuclei	259.84a	238.25b	254.77a	253.56ab	367.28a	272.96b	194.82c	248.49b
Peroxisomes	178.77a	133.42b	162.49a	156.36a	148.20b	179.54a	161.05ab	113.84c
Cytosol	181.49a	107.60c	120.94b	166.62a	155.00a	158.85a	149.06a	121.45b
Vacuole	3.18c	3.82b	4.40a	1.82d	4.99a	2.06b	0.46c	1.98b