Fig. 2. The effect of light quality on leaf development.

Leaf anatomical phenotype (a) and traits (b) and lower epidermal stomata (c) of rapeseed seedlings under different lights. PP palisade parenchyma, SP spongy parenchyma, RB red–blue light, RBG red–blue–green light, RBW red–blue–white light, RBY red–blue–yellow light, W white light. The units of the thickness of palisade tissue, spongy tissue and leaf and aperture length and aperture width are “µm”; the units of aperture area and stomatal frequency are “µm²” and “No. mm⁻²,” respectively. Vertical bars are means ± SDs (four views of each replicate, n = 3). Bars labeled with lowercase letters are significantly different by Duncan’s test at the P < 0.05 level