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Effect of wax-layer strength on (A) seminal root number, (B) total length of main axes and (C) root dry matter (DM), and effect of water regime on (D) nodal root number, (E) total length of main axes and (F) dry matter. Bars represent the standard error. Water regimes: WW, well-watered; WD, water-deficit. Modified from Botwright Acuña and Wade (2005).
