Fig. 3

Proportion of aerenchyma. Left: cross-sections at 20 and 30 mm from root tip of seminal root of each genotype grown in high and low P conditions. Pictures were taken in bright field microscopy and correspond to the average development of aerenchyma for each genotype and each treatment at 07 DPT. Scale bars represent 100 µm. Right: means with standard deviation (n = 4 to 9 biological replicates) of the proportion of aerenchyma in seminal roots at 20 (left panels) and 30 (right panels) mm from the root tip of plants grown in high (black) and low (grey) P conditions. Plants were sampled (A) at 15 DPT for the first experiment and (B) at 07 and 14 DPT for the second experiment. Means with different letters are significantly different (ANOVA followed by Tukey’s HSD at p ≤ 0.05)