Fig. 2

Cotton seedlings at 7 DAT (days after transplanting from sand medium at emergence) under LEDs (light-emitting diodes) and HPS (high pressure sodium) lamp (A). The bar is 5 cm. Effect of light sources on the number of true leaves over time (B), plant height (C) measured from the junction of root and hypocotyl to the apex, stem diameter (D) measured at the junction of root and hypocotyls, area of each true leaf (E) measured at 28 DAT, total leaf area (F) and biomass (G) determined at 28 DAT. Each value is a mean of five replicates ± standard deviation (SD). Different letters indicate significant differences at p < 0.05