Fig. 5From: Photosynthetic characteristics and chloroplast ultrastructure of welsh onion (Allium fistulosum L.) grown under different LED wavelengthsLeaf anatomy of Welsh onions under different light conditions. The fistular lamina of Welsh onion (Allium fistulosum L.) leaves changes from being solid to hollow during development, and the cells around the cavity break up until the remaining 1–2 layers of cells from the palisade layer show cell wall residues (‘arrowheads’) [30]. E: epidermis; PT: palisade tissue; ST: spongy tissue; VB: vascular bundle; W: white light; B: blue light; G: green light; Y: yellow light; R: red light. Scale bars = 50 μmBack to article page