Released amounts of unsaturated C18 α, ω-9en-dicarboxylic acid and ω-OH-9-en-carboxylic acid, characteristic suberin markers from enzymatically isolated RHCW. Data are given in nanomoles per square centimeter. (Tj, T. juruana; Lc, L. corymbulosa; Sm, S. martiana; and Cb, C. benthami). Three samples per species out of pooled root tips from 30 plants were analyzed (C. benthami, n = 3 of 5 plants). Error bars indicate sd among the three samples.