The intensity profile of silicon inclusions (in relative units) in cell walls of the leaf epidermis of Q. robur shaded trees (No. 1 and No. 2) and unshaded trees (No. 3 and No. 4); data are means ± SD of three replicates; 30-35 cells of each type in the epidermis were used in each replicate. asignifies notable variations in the factors of tree No. 1 (with shading) from tree No. 3 (without shading) (P ≤ 0.05); bindicates substantial divergences in the variables of tree No. 2 (with shading) from tree No. 3 (without shading) (P ≤ 0. 05); cshows noteworthy differences in the parameters of tree No. 1 (with shading) from tree No. 4 (without shading) (P ≤ 0.05); ddenotes noteworthy disparities in the parameters of tree No. 2 (with shading) from tree No. 4 (without shading) (P ≤ 0.05).

Table 4: The intensity profile of silicon inclusions (in relative units) in cell walls of the leaf epidermis of Q. robur shaded trees (No. 1 and No. 2) and unshaded trees (No. 3 and No. 4); data are means ± SD of three replicates; 30-35 cells of each type in the epidermis were used in each replicate. asignifies notable variations in the factors of tree No. 1 (with shading) from tree No. 3 (without shading) (P ≤ 0.05); bindicates substantial divergences in the variables of tree No. 2 (with shading) from tree No. 3 (without shading) (P ≤ 0. 05); cshows noteworthy differences in the parameters of tree No. 1 (with shading) from tree No. 4 (without shading) (P ≤ 0.05); ddenotes noteworthy disparities in the parameters of tree No. 2 (with shading) from tree No. 4 (without shading) (P ≤ 0.05).

Parameter	The intensity profile of silicon fluorescence in the leaf of oak four trees, relative units
	Tree No.1	Tree No. 2	Tree No. 3	Tree No. 4
Adaxial epidermis
Anticlinal wall of pavement cells	120 ± 13.0	105 ± 11.0	140 ± 12^b	145 ± 13^c,d
Periclinal wall of pavement cells	70 ± 5.3	55 ± 4.3	124 ± 11^a,b	115 ± 12^c,d
Trichome	Absent	Absent	Absent	Absent
Stomata	Absent	Absent	Absent	Absent
Abaxial epidermis
Anticlinal wall of pavement cells	75 ± 8.8	80 ± 9.3	100 ± 9.7^a,b	120 ± 11^c,d
Periclinal wall of pavement cells	70 ± 5.3	23 ± 1.7	82 ± 5.4^a,b	95 ± 7.7^c,d
Trichome	156 ± 11	121 ± 12.0	180 ± 15^a,b	185 ± 12^c^,^d
Stomata	71 ± 5.4	65 ± 7.1	125 ± 12^a,b	128 ± 11^c^,^d