Figure 5 in Under pressure: maternal effects promote drought tolerance in progeny seed of Palmer amaranth (Amoronthus polmeri)

Figure 5. Shifts in distribution of base water potential of progeny seeds from two Amoronthus polmeri populations (California and Kansas) grown under contrasting maternal water conditions (continuous̜ ̜ ̹ water-deficit ̹ vs. well-watered). Seed germination was tested at two temperatures (20 and 30 C) under five water potentials. A hydrotime model, ̜ ̹ θ Equation 3, g w,t¼ Φ w ― H w,σ, was fit to estimate the median base water potentials, w (vertical dashed lines), and their respective standard deviations, σ, g tg bð50Þ wb bð50Þ wb to produce these probability density curves of normal distribution (see Table 1 for parameter estimates). Note that the area under the curve for base water potential values>0 indicates the proportion of seeds that have not germinated (i.e., dormancy level).