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. 2022 Mar 3;129(6):657–668. doi: 10.1093/aob/mcac029

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© The Author(s) 2022. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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Fig. 2. — The structural mechanical properties of maize brace roots are greater for whorls closer to the ground at the R6+ reproductive stage. (A) Example of a force–displacement curve from an R6+ brace root subjected to 3-point bending. (B) The structural stiffness (K) was defined as the linear slope of the force–displacement curve, the ultimate load (UL) was defined as the highest force the sample withstood without failure and the break load (BL) was defined as the force upon fracture. (B–D) A two-way ANOVA showed that: (B) K was impacted by both whorl (P < 0.05) and genotype (P < 0.05), with whorls closer to the ground (WR1) having a higher K than whorls farther away (WR2), and A632 having higher K compared to B73. (C) UL was impacted by whorl (P < 0.05), with whorls closer to the ground (WR1) having a larger UL. (D) BL was impacted by whorl (P < 0.05), with whorls closer to the ground (WR1) having a larger BL. WR – whorl.