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Fig. 3 | Chemical and Biological Technologies in Agriculture

Fig. 3

From: Humic acids and Herbaspirillum seropedicae change the extracellular H+ flux and gene expression in maize roots seedlings

Fig. 3

Relative mRNA expression of the a low-affinity nitrate transporter (Nrt2.1) and b high-affinity nitrate transporter (Nrt1.1) genes in maize roots treated or untreated with 50 mg C L−1 humic acid (HA), H. seropedicae (Bac) or 50 mg C L−1 humic acid and H. seropedicae (HA + Bac) for 7 days in hydroponic culture. mRNA levels were normalized in relation to the control gene (ubiquitin). The error was calculated by the REST® program

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