Fig. 4

Effect of overexpression HrHEMA, HrPOR and HrCAO on Tobacco. a to c show changes in expression of HrHEMA, HrPOR and HrCAO in transgenic tobacco leaves. ** means p < 0.05 compared with control; d Total chlorophyll contents of all the transgenic tobacco leaves. * means p < 0.05; # means p < 0.05 compared with 2000 lx; # means p < 0.05 compared with 600 lx; e shows the leave color changes of HrHEMA, HrPOR and HrCAO transgenic tobacco leaves under 2000 lx, 6000 lx and 1000 lx illumination. Images were photographed 40 days after different light intensities; f exhibits the plant status after 70 days growth under 10,000 lx light intensity