FIGURE 4.
Organ- and developmental-regulation expression of selected ZIP genes in N. tabacum (A–H). Analysis was performed by RT-qPCR. Plants were grown at control medium. Transcript levels were monitored in the whole roots and leaves of plants grown for 4 and 6 weeks, and after 9 weeks in the apical (A) and basal (B) segments of roots (R), in stems (S), in young upper leaves (UL), and old lower leaves (LL). The level of genes transcript was normalized to PP2A expression level. Values correspond to means ± SD (n = 3); those with the ratio greater than two are considered significantly different.