Fig. 8. Abscisic acid concentrations in florets (a), vascular cobs (b), endosperm/nucellus composite tissues (c) and pedicels (d) of plants subjected to control, shade, and water deficit treatments during the pre-pollination stage (upper panels) and post-pollination stage (lower panels) in Exp. II. Tissues were sampled from apical and basal regions of ears at the conclusion of treatments. Means ± SEM of 10 replicates are shown.