Fig. 3. The effect of light quality on the photosynthetic characteristics.

Net photosynthetic rate (Pn, a); chlorophyll fluorescence parameters, including Fv/Fm (b), Y(II), Y(NPQ), and Y(NO) (c) in the top third leaf of rapeseed; and the levels of NSC (d), sucrose (e), and starch (f) under different lights. RB red–blue light, RBG red–blue–green light, RBW red–blue–white light, RBY red–blue–yellow light, W white light. Vertical bars are means ± SDs (n = 3). Bars labeled with lowercase letters are significantly different by Duncan’s test at the P < 0.05 level