Fig. 3.

Relationship between the basal diameter of daughter roots and the diameter of bearing root segments. Different criteria were set for the length of bearing root segment and its branching number: length of axile root segment was 5 cm; length of first-order LR segment was 2 cm and its branching number was not less than 4; length of second-order LR segment was 1 cm and its branching number was not less than 2. (A) Different branching-order LRs were pooled for each treatment combination. (B) For each branching order, pooling the three treatment combinations. Curves of different thickness indicate the 50 % (thin) and 99 % (thick) quantile curves. The total number of roots for each-order LRs is given in the key.