Fig. 4.

Effects of aerated and stagnant, deoxygenated conditions on root growth of Zea mays subsp. mays inbred line Mi29, introgression line IL-AE91, and Z. nicaraguensis. Plants were grown under aerated conditions for 25–28 d and were then transferred to stagnant, deoxygenated conditions (Aerated-to-Stagnant) or to continued aerated conditions (Aerated-to-Aerated). (a) Root length. (b) Extension rates of roots after transfer to stagnant, deoxygenated conditions. Data are means (±SD), n=4. Different letters indicate significant differences between each line at each time-point as determined using one-way ANOVA and Tukey’s test for multiple comparisons (P<0.05).