Fig. 7From: Overexpression of MfPIP2-7 from Medicago falcata promotes cold tolerance and growth under NO3 − deficiency in transgenic tobacco plantsNitrate reductase (NR) activities in leaves (a) and roots (b) in transgenic plants in comparison to the wild type. Means of three repeats and standard errors are presented; the same letter above the column indicates no significant difference at P < 0.05Back to article page