Fig. 7From: Genome-wide identification and analysis of WRKY gene family in maize provide insights into regulatory network in response to abiotic stressesExpression profiles of 21 ZmWRKY genes under drought stress treatments in two different tissues. QRT-PCR data was normalized using maize Actin gene. X-axes represent various treatments (CK, normal condition; D1, D2, D4 and D8 indicate hours of drought treatment in leaves. D2 and D4 indicate hours of drought treatment in roots.). And different genes and y-axes are scales of relative expression level. Error bars result from three biological replicates. Asterisks on top of the error bars represent the significance levels. *Significantly different at P < 0.05; ** significantly different at P < 0.01Back to article page