Delay, ChristinaImin, NijatDjordjevic, Michael2015-09-232015-09-231664-462Xhttp://hdl.handle.net/1885/15652Plant root systems arise de novo from a single embryonic root. Complex and highly coordinated developmental networks are required to ensure the formation of lateral organs maximizes plant fitness. The Arabidopsis root is well-suited to dissection of regulatory and developmental networks due to its highly ordered, predictable structure. A myriad of regulatory signaling networks control the development of plant roots, from the classical hormones such as auxin and cytokinin to short-range positional signaling molecules that relay information between neighboring cells. Small signaling peptides are a growing class of regulatory molecules involved in many aspects of root development including meristem maintenance, the gravitropic response, lateral root development, and vascular formation. Here, recent findings on the roles of regulatory peptides in these aspects of root development are discussed.Christina Delay was supported by an Australia Postgraduate Award and GRDC Grains Industry Research Scholarship (GRS10329). This work was supported by an Australian Research Council grant to Michael A. Djordjeric and Nijat Imin (DP140103714).6 pages© 2013 Delay, Imin and Djordjevic. 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) or licensor 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.cepcleidargf/clel/glvregulatory peptidesroot developmentsmall post-translationally modified peptidessmall signaling peptides2013-09-0610.3389/fpls.2013.003522015-12-09