Table II.

Distributions of potassium, calcium, strontium, and chlorine, measured as (p − b)/b ratios, in different cell types of an excised leaf from rough lemon grown in unamended nutrient solution and fed 25 mm Sr(Cl)₂ + 5 mm KCl through its petiole for 24 h

Cell Type	(p − b)/b
	Potassium	Calcium	Strontium	Chlorine
Adaxial epidermis	0.334 ± 0.008a	0.023 ± 0.002	0.051 ± 0.006	0.118 ± 0.004
Palisade mesophyll	0.066 ± 0.008	0.164 ± 0.006	0.256 ± 0.006	0.208 ± 0.009
Spongy mesophyll	0.105 ± 0.013	0.144 ± 0.014	0.196 ± 0.013	0.239 ± 0.009
Bundle sheath	0.390 ± 0.032	0.012 ± 0.003	0.013 ± 0.005	0.171 ± 0.009
Noncrystal idioblast	0.571 ± 0.097	0.007 ± 0.004	0.004 ± 0.002	0.157 ± 0.037
Abaxial epidermis	0.254 ± 0.025	0.008 ± 0.003	0.039 ± 0.011	0.138 ± 0.011

^aData are presented as mean ± se (n = 3 to 10 cells of each type from one leaf). The lsds (at P = 0.05) between cell types were: potassium, 0.078; calcium, 0.032; strontium, 0.031; chlorine, 0.038.