Fig. 3From: Exogenous trehalose improves growth under limiting nitrogen through upregulation of nitrogen metabolismThe contents of NO3 − (a) and NH4 + (b), nitrate reductase activity (c) and leaf total nitrogen content (d) in the youngest fully expanded leaf after different treatment for different time as indicated. Values represent the mean ± SE of 5 individual plants. Within each set of experiments, the different letters indicate significant differences (P < 0.05)Back to article page