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Variation in root dry matter (DM) according to genotype and sampling time (days after sowing, DAS) in pots containing a wax layer at a depth of 0·25 m for: (A) below the wax layer in well-watered conditions; (B) below the wax layer in water-deficit conditions. Bars represent the standard error. Modified from Botwright Acuña et al. (2012) with permission from the publisher.
