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Fig. 4. Effect of water stress on leaf starch levels during seed filling. Stress was applied early in seed filling at the beginning of growth stage R6. The time of application of the stress relief treatments is shown on the x axis by S1 (early) and S2 (late). The final sample in Exp. 1 was taken when each treatment reached physiological maturity (growth stage R7, Fehr and Caviness, 1977) and they are grouped together disregarding the time scale on the x axis. Means with asterisks are significantly (P = 0.05) lower than the control.
