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Nat Cell Biol. 2008 Aug;10(8):946-54. doi: 10.1038/ncb1754. Epub 2008 Jul 11.

The auxin influx carrier LAX3 promotes lateral root emergence.

Author information

1
School of Biosciences & Centre for Plant Integrative Biology, University of Nottingham, LE12 5RD, UK.

Abstract

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.

PMID:
18622388
DOI:
10.1038/ncb1754
[Indexed for MEDLINE]

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