Table 3.

Stepwise linear regression analysis (β value) of metal accumulation and the expression of AhZIP genes in the roots of Fenghua 1 and Silihong (n = 24).

Gene Expression a	[Fe]root b	[Fe]shoot c	Total Fe in Plants	% of Fe in Shoots	[Zn]root d	[Zn]shoot e	Total Zn in Plants	[Mn]shoot f	Total Mn in Plants	% of Mn in Shoots
AhIRT1.1	−0.07	−0.08	−0.52 **	0.65 **	0.21	0.60 **	0.16	1.19 ***	0.05	0.95 ***
AhIRT1.2	−0.39 *	0.02	0.10	0.16	0.30	0.32	0.28	0.06	0.44 *	−0.34 *
AhZIP1.1	0.10	0.11	−0.14	−0.07	−0.21	−0.17	−0.20	−0.06	−0.27	0.15
AhZIP1.2	−0.01	0.12	−0.24	−0.05	0.13	0.03	−0.12	−0.05	−0.26	0.10
AhZIP2.1	0.01	0.21	−0.30	0.07	0.18	0.16	−0.12	−0.04	−0.11	0.01
AhZIP3.5	0.06	0.27	−0.14	0.09	0.26	0.28	0.09	−0.12	−0.05	−0.14
AhZIP3.6	−0.12	−0.15	−0.32	0.11	0.04	0.10	−0.26	0.57 **	−0.25	0.70 ***
AhZIP4.1	0.00	0.13	−0.35	−0.11	−0.06	−0.02	−0.17	−0.18	−0.22	0.05
AhZIP6.1	−0.60 **	−0.42 *	0.02	0.06	0.02	−0.04	0.10	0.13	0.37	−0.15
AhZIP7.2	0.10	−0.04	0.15	0.09	0.49 *	0.06	0.45 *	0.07	0.28	−0.10
AhZIP7.8	0.01	0.13	−0.27	−0.08	0.21	0.13	−0.10	−0.03	−0.18	−0.01
AhZIP11.1	0.11	0.23	0.19	0.26	−0.05	0.43	−0.03	0.56 *	0.20	−0.14

^a Gene expression is calculated as −ΔΔCT, ^b Fe concentration in roots, ^c Fe concentration in shoots, ^d Zn concentration in roots, ^e Zn concentration in shoots, ^f Zn concentration in shoots, * p < 0.05, ** p < 0.01, *** p < 0.001.