The auxin influx carrier LAX3 promotes lateral root emergence.

Journal Article (Journal Article)

Lateral roots originate deep within the parental root from a small number of founder cells at the periphery of vascular tissues and must emerge through intervening layers of tissues. We describe how the hormone auxin, which originates from the developing lateral root, acts as a local inductive signal which re-programmes adjacent cells. Auxin induces the expression of a previously uncharacterized auxin influx carrier LAX3 in cortical and epidermal cells directly overlaying new primordia. Increased LAX3 activity reinforces the auxin-dependent induction of a selection of cell-wall-remodelling enzymes, which are likely to promote cell separation in advance of developing lateral root primordia.

Full Text

Duke Authors

Cited Authors

  • Swarup, K; Benková, E; Swarup, R; Casimiro, I; Péret, B; Yang, Y; Parry, G; Nielsen, E; De Smet, I; Vanneste, S; Levesque, MP; Carrier, D; James, N; Calvo, V; Ljung, K; Kramer, E; Roberts, R; Graham, N; Marillonnet, S; Patel, K; Jones, JDG; Taylor, CG; Schachtman, DP; May, S; Sandberg, G; Benfey, P; Friml, J; Kerr, I; Beeckman, T; Laplaze, L; Bennett, MJ

Published Date

  • August 2008

Published In

Volume / Issue

  • 10 / 8

Start / End Page

  • 946 - 954

PubMed ID

  • 18622388

Electronic International Standard Serial Number (EISSN)

  • 1476-4679

International Standard Serial Number (ISSN)

  • 1465-7392

Digital Object Identifier (DOI)

  • 10.1038/ncb1754


  • eng