Figure 7.

Root growth in hd2 mutants under control and osmotic stress. Images of root growth in 10-day old WT, hd2a, hd2c, and Mac16 seedlings under control (A) and PEG-6000 (10%) conditions (C). (B, D) Primary root lengths measured in 10-day old WT, hd2a, hd2c, and Mac16 seedlings under control (B) and PEG-6000 (D) conditions. (E) Secondary root number counted in 10-day old WT, hd2a, hd2c, and Mac16 seedlings under control conditions. Data shown are means ± standard errors (n = 60). Three independent experiments were performed in this test. In each experiment, 20 seedlings of each genotype were used to measure the primary root lengths or secondary root numbers. The significance of the differences between different genotypes was determined by one-way ANOVA followed by post-hoc Tukey’s HSD tests. Lowercase letters indicate significant differences (p < 0.05).