Fig. 6.

Aerenchyma formation in roots of Zea mays subsp. mays inbred line Mi29, introgression line IL-AE91, and Z. nicaraguensis that were grown under aerated conditions and were then transferred to stagnant, deoxygenated conditions. Plants were grown under aerated conditions for 25–28 d before transfer, at which point the roots were ~100 mm long. Percentage of aerenchyma area in cross-sections of roots at 10–100 mm from the tip were made on (a) day 0 (i.e. aerated conditions), (b) day 1, (c) day 2, (d) day 3, and (e) day 4. Data are means (±SD), n=3. Different letters indicate significant differences between means across all root positions as determined using distances within one growth condition (P<0.05, one-way ANOVA and then Tukey’s test for multiple comparisons).