Fig. 1.

Overexpression of psbS is associated with higher radiation use efficiency. a Biomass at leaf 9 stage, b leaf area at leaf 9 stage and c Radiation use efficiency (RUE) for the 4 weeks preceding leaf 9 stage calculated by plotting canopy accumulated intercepted radiation and accumulated above ground dry weight (biomass). Data from experiment 2 is shown. Regression lines are shown and used to calculate RUE, which is given by the slope between the two variables. Values are average ± standard errors of the means of each plot i.e., for a, b n = 9 (means of measurements from individual plants from all plots) and for c n = 3 (wild-type, WT) and n = 6 (overexpressors, OE) (means of plot means). Letters ‘a’ and ‘b’ indicate significant difference (p = 0.019, unpaired t-test)