Fig. 3.

Venn diagrams of NACs in the roots, stems and leaves of Populus simonii× P.nigra.a The number of NACs in L-VS-S, L-VS-R and R-VS-S pair comparisons; b The number of salt-responsive NACs across the three tissues. The numbers in red and green denote highly- and lowly-expressed NACs, respectively. The numbers in black denote the sum of highly- and lowly-expressed NACs. R, S and L indicate roots, stems and leaves, respectively