Arabidopsis glutamate receptor is involved in abscisic acid response.

The ionotropic glutamate receptor (iGluR) plays an important role in neuronal signaling in animal cells. There are at least 20 glutamate receptor-like (GLR) genes in . These genes are involved in seed germination, root growth, wounding response, stomata closure, . A recent study showed that Arabidopsis clade III glutamate receptor is involved in salt stress response. We tested whether is involved in abscisic acid (ABA) response. In the present study, we found that the expression of was reduced by ABA treatment. Under ABA-treated condition, overexpression lines exhibited significantly higher seed germination rate at 60, 72 and 84 h under ABA-treated condition. A point mutation in 14-3-3 binding site of GLR3.7 in GLR3.7-S860A overexpression lines exhibited higher seed germination inhibition under ABA-treated conditions. Our results support that is involved in ABA response in Arabidopsis. In addition, Ser-860 of GLR3.7 appears to be important in ABA response.