Fig. 7

Expression profiles of ZmSMR genes under various abiotic conditions. The x-axes represent treatment time, and y-axes indicate scales of relative expression levels. Three-leaf maize seedlings were treated with 4 °C (low temperature), 42 °C (high temperature), or 100 μM of ABA for 24 h, or with 20% PEG and 200 mM of NaCl for 72 h. Mixed leaves of three seedlings as well as the untreated leaves were collected after treatment for 2, 6, 12, 24, 48, 72 h, where the untreated leaves were regarded as the control check (CK). The relative expression values were log2 transformed. The qRT-PCR data were normalized against the expression of Actin as an internal control. Error bars indicate standard deviations