Figure 2
Effects of severe water deficit on plant photosynthetic efficiency. (A) Dynamics of whole-rosette mean F v/F m of well-watered (WW) plants and stressed (surviving and perishing) plants under severe water deficit (SWD) as a function of days after four-leaves stage (L4; beginning of SWD) until bolting. Data are means (± SE) of 13–29 plants. (B) 3-D representations of vegetative rosettes under WW and SWD conditions in F v/F m false colour (from black pixel values (0) through red, yellow, green, blue to purple (ending at 1)) and their corresponding F v/F m distributions during time courses. Asterisks indicate p-value < 0.01 (Hartigan’s dip test) meaning significant departure from unimodality of F v/F m values. Arrows indicate rewatering step. (C) Dynamics of the proportion of non-unimodal (i.e., multimodal) plants under WW and SWD after L4 stage until bolting following the Hartigan’s dip test.