Glutamate-gated receptor that probably acts as non-selective cation channel. May be involved in light-signal transduction and calcium homeostasis via the regulation of calcium influx into cells. May form heteromers. Expressed predominantly in roots. First strongly detected in all cell types of the root except at the apex. Later expressed at the root-shoot junction. Belongs to the glutamate-gated ion channel (TC 1.A.10.1) family.