. 2016 Jun 10;7:842. doi: 10.3389/fpls.2016.00842

Table 1.

Effects of solution treatments on lettuce root concentration of K, Mg, Na, Fe, and Zn.

Treatments	K	Mg	Na	Fe	Zn
Control	48.1^b	1.2^b	0.67^b	44.0^a	40.3^c
NaCl	46.5^c	1.9^a	2.72^a	44.0^a	52.3^b
ZnSO₄	51.0^a	1.1^c	0.59^c	36.0^b	674.5^a
Significance	^**	^**	^***	^**	^***

K and Mg values are reported in g kg^-1, while values of Na, Fe, and Zn are expressed as mg kg^-1. Superscript letters denote Student-Newman-Keuls post-hoc classes from one-way ANOVA (p = 0.01). Significant at

^**

P ≤ 0.01 and

^***

P ≤ 0.001.