Fig. 2 Concentrations of (a, b) starch, (c, d) sucrose, and (e, f) glucose and fructose in shoots (upper panels) and roots (bottom panels) in control plots (closed circles) and drought plots (open circles) at the beginning and towards the end of rain exclusion. Points represent mean values of time pooled samples (n = 3–8) from three control and drought plots, respectively, sampled within 1–5 consecutive d. Error bars indicate SE. P-values refer to overall treatment effects, asterisks indicate significance levels of difference of means between control and treatment for individual sampling dates: