Additional file 1: of Genome-wide transcriptional adaptation to salt stress in Populus

Figure S1. Whole plant responses along the time-course of NaCl treatments. a, plants with no salt treatment; b, plants treated with 100 mM NaCl; c, plants treated with 100 mM NaCl followed with 3 days recovery, and then treated with 200 mM NaCl; d, plants treated with 200 mM NaCl directly. Photos were taken at the time points indicated on the left side. (JPG 17970 kb)