The effect of percent blue light on stem length for seven species under two PPFs.

<p>Note scale break for percent BL between 30 and 60. Each data point shows the mean and standard deviation of three replicate studies for each species (n = 3). Some error bars are smaller than the symbol size. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0163121#pone.0163121.g001" target="_blank">Fig 1</a> for symbol color and shape legend. To minimize confounding spectral effects the regression line includes only the four treatments with comparable green and red wavelengths for each PPF. When significant, p-values and percent change are shown.