NRT2.1 is a high affinity nitrate transporter which is up-regulated by nitrate. Functions as a repressor of lateral root initiation independently of nitrate uptake. Synonymes: Protein ACH1, Protein LATERAL ROOT INITIATION 1, ACH1, ATNRT2.1, ATNRT2:1,, LIN1, NITRATE TRANSPORTER 2, NITRATE TRANSPORTER 2.1, NITRATE TRANSPORTER 2:1, NRT2, NRT2.1, NRT2:1, NRT2;1AT