Figure 4
Normalized relative quantities (NRQ) of the rrn26 gene estimated in winter wheat flag leaves of three varieties grown under different agricultural production systems. Symbols and bars represent the mean and confidence limit at 95% level, respectively. X-axis: Lanes 1-4: cv. Cubus collected in 2006; lanes 5-7: cv. Centenaire collected in 2008; lanes 8-10: cv. Tommi collected in 2008; triangle: conventional agriculture; circle: organic agriculture; square: no nitrogen applied.