Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Plant Signal Behav. 2007 Jul;2(4):284-6.

L-Glutamate as a Novel Modifier of Root Growth and Branching: What's the Sensor?

Author information

  • 1Lancaster Environment Centre; Department of Biological Sciences; Lancaster University; Lancaster UK.

Abstract

Exogenous L-glutamate (L-Glu) has been shown to be able to elicit major changes in Arabidopsis root architecture at micromolar concentrations. The root response, which is strongly genotype-dependent, is specific to L-Glu and involves both inhibition of primary root growth and stimulation of root branching behind the primary root tip. The L-Glu appears to be sensed directly at the root tip, where it inhibits meristematic activity. An intriguing and still unanswered question is whether members of the family of Glu receptor-like genes (GLRs) have a role in mediating this response. A pharmacological approach described here, using agonists and antagonists of mammalian ionotropic Glu receptors, has failed to resolve the issue. Progress towards identifying the genes involved in the root response to L-Glu is likely to come through the application of forward and reverse genetics, in combination with quantitative trait loci (QTL) mapping.

KEYWORDS:

Arabidopsis thaliana; ionotropic glutamate receptors; root apical meristem; root architecture; signalling

PMID:
19704683
[PubMed]
PMCID:
PMC2634152
Free PMC Article

Images from this publication.See all images (2)Free text

Figure 1
Figure 2
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for Landes Bioscience Icon for PubMed Central
    Loading ...
    Write to the Help Desk