. 2010 Mar 30;105(6):925–937. doi: 10.1093/aob/mcq072

Table 3.

The Na⁺, K⁺, Ca²⁺ and Mg²⁺ concentrations, Na⁺ : K⁺ ratio and net K⁺/Na⁺ selectivity of the new leaves of the 8-week-old Crambe maritima plants with 20 d of salt spray or 40 d of root-zone salinity ranging from 0 to 300 mm NaCl

Treatment	mmol Na⁺ g⁻¹	mmol K⁺ g⁻¹	mmol Ca²⁺ g⁻¹	mmol Mg²⁺ g⁻¹	Na⁺ : K⁺ ratio	K⁺ selectivity
Control spray	0·05 ± 0·02^a	1·49 ± 0·06^a	1·06 ± 0·6^a	0·16 ± 0·00^a	0·03 ± 0·01^a	0·15 ± 0·04^a
Salt spray	1·01 ± 0·11^b	0·90 ± 0·19^b	0·99 ± 0·09^a	0·24 ± 0·00^b	1·44 ± 0·39^b	0·00 ± 0·00^b
0	0·03 ± 0·06^a	1·47 ± 0·09^a	1·16 ± 0·07^a	0·17 ± 0·01^a	0·02 ± 0·00^a	0·16 ± 0·03^a
50	2·40 ± 0·23^c	0·46 ± 0·04^bc	0·46 ± 0·03^b	0·08 ± 0·01^c	5·48 ± 0·91^c	1·55 ± 0·28^c
100	2·59 ± 0·13^c	0·49 ± 0·07^bc	0·43 ± 0·04^b	0·10 ± 0·01^c	5·68 ± 0·91^c	2·98 ± 0·51^c
200	2·87 ± 0·42^c	0·51 ± 0·10^bc	0·24 ± 0·02^bc	0·08 ± 0·00^c	7·18 ± 2·09^c	6·20 ± 1·70^c
300	4·74 ± 0·26^d	0·20 ± 0·06^c	0·12 ± 0·01^c	0·04 ± 0·00^d	29·41 ± 9·26^d	2·00 ± 0·75^c

Plants were grown on gravel culture with hydroponics. New leaves were defined as the third true leaf and onwards.

Values are means ± s.e. (n = 4) and are expressed per gram dry weight of the leaves. Means in the same column that have the same letter are not significantly different at P < 0·05 (Tukey's test). Concentrations of P and N were also determined with no significant differences in P concentrations and for the N concentration only a significant difference for the 300 mm NaCl treatment.