Figure 1.

Soil Salinity Inhibits +FR-Induced Elongation

(A) Left: hypocotyl length of 7-day-old Col seedlings germinated in Wl, transferred to NaCl soil of the indicated concentration at day 3, and then shifted to WL ± FR at day 4. Data represent mean (n ≥ 19) ±SE. Asterisks indicate salt-mediated inhibition of hypocotyl elongation compared to 0 mM NaCl control; Student’s t test (p < 0.05). Right: the same data expressed as the percentage of +FR-induced elongation at each salt concentration.

(B) Representative 21-day-old Col plants germinated in Wl and transferred to ±25 mM NaCl at day 3, before shifting to WL ± FR at day 10.

(C) Rosette circumference of plants grown as in (B) (n ≥ 10).

(D) Hypocotyl length of 11-day-old tomato (Solanum lycopersicum var. “Moneymaker”) seedlings germinated in Wl, transferred to ±40 mM NaCl at day 7, and shifted into WL ± FR at day 8 (n ≥ 19).

(E) Hypocotyl length of tobacco (Nicotiana benthamiana) seedlings grown as in (D) (n ≥ 18). Boxplots are visualized by the Tukey method. In all figures, different letters designate significantly different means by 2-way ANOVA + Tukey’s post hoc test (p < 0.05). Interaction p value is shown inset.

See also Figure S1.