Abstract

Lateral root organogenesis plays an essential role in the development of the plant root system. In Arabidopsis thaliana, the AP2/ERF transcription factor PUCHI is required for the correct initiation and morphogenesis of lateral root primordia (LRPs). Previous studies have shown that loss of PUCHI function alters the LRP developmental program and its functional patterning. Furthermore, PUCHI induces the very long chain fatty acid (VLCFA) biosynthetic pathway in branching roots. Our recent results suggest that PUCHI also regulates the VLCFA incorporation pathway, especially for cutin deposition on the LRP surface. The precise control of the PUCHI-dependent network over VLCFA metabolism and its influence on the functional patterning mechanisms in developing LRPs are being investigated.

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Soazig Guyomarc’h is professor at the University of Montpellier. She has been studying plant development using functional genetics and computer-based modelling approaches while working at the University of Orsay, France, the University of Berne, Switzerland, and the Reproduction and Development laboratory at Lyon, France, successively. Since 2009 she is a member of the DIADE research unit at Montpellier (IRD/University of Montpellier) where her investigations have focused on the properties of the gene regulatory network that controls lateral root formation and patterning.