Figure 2. The root is able to autonomously sense temperature and respond to it.

• A
  Elongation responses of detached roots. Shoots were removed from 4‐day‐old Arabidopsis thaliana (n = 18–19), 4‐day‐old Brassica oleracea (n = 11), and 5‐day‐old Solanum lycopersicum (lycop., n = 10–12) seedlings grown at 20°C. Detached roots were grown for additional 4 days at 20 or 28°C, scale bar = 10 mm.
• B–D
  Nine‐day‐old seedlings were hypocotyl grafted, recovered for 7 days, and then cultivated at 20 or 28°C for additional 7 days (n = 16–26). (A–D) Boxplots show medians, interquartile ranges, and min–max values with individual data points superimposed as colored dots. Different letters denote statistical differences at P < 0.05 as assessed by one‐way (A, Arabidopsis) or two‐way (A–D) ANOVA and Tukey's HSD post hoc test. The data are representative of two (A) or three (B–D) independent experiments.

Source data are available online for this figure.