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. 2019 Oct 18;10:1289. doi: 10.3389/fpls.2019.01289

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Copyright © 2019 Kumar, Pandey, Roychoudhry, Nayyar, Kepinski and Varshney

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Representation of morphological and physiological changes associated with peg development and pod initiation. (A) Pictorial representation of pegging. a–b, gravitropic response; c–d, peg elongation; e, peg touching soil which impact mechanical stimulus; f–h, peg tip reorientation against gravity; i–j, pod swelling and seed setting; (B) Sedimentation and displacement of amyloplast during peg elongation (vertical position, left panel) and gravity induced bending (horizontal position, right panel); (C) Distribution of auxin in peg during elongation and gravitropic bending, and (D) agravitropic bending of subterranean peg. Thickness of arrow indicates the abundance of auxin.