Fig. 3From: Transporter NRT1.5/NPF7.3 suppresses primary root growth under low K+ stress by regulating the degradation of PIN-FORMED2The nrt1.5 mutant possesses a higher auxin concentration in the primary root tip. The 4-d-old seedlings of the ProDR5:GUS crossing line were transferred to MS and LK media for different days and then stained to detect GUS expression, bars = 0.1 mmBack to article page