Figure 7.
The effect of Fe deficiency on root morphology. A, Seedlings subjected to differing Fe supplies. B, Total root length. C, PR length consisting of the BZPR (darker gray) and LR FZPR (lighter gray). D, 1° LR density. E, Average 1° LR length. F, 2° LR density. G, Average 2° LR length. The numbers within the LR FZPR bar of C indicate the length of the LR FZPR as a percentage of the total PR length. Seedlings were cultivated for 4 d with no Fe added and then grown on the Fe treatments indicated for a further 12 d. Bars show means ± se (n.s. denotes not significant; n = 19–30, except that the bars indicated with asterisks had only two 2° LRs). [See online article for color version of this figure.]