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Fig. 2. S. kraussiana leaves comprise three chloroplast-containing cell
layers. (A) Transverse section through leaves arranged around an
apex showing the three main cell layers of the leaf, and the downwards
orientation of chloroplasts in the mesophyll. The asterisk indicates the
position of the meristem; red arrowheads indicate the abaxial surfaces of the
dorsal (d) and ventral (v) leaves; black arrows indicate large chloroplasts in
the mesophyll; the blue arrow indicates a guard cell. Scale bar: 40 µm.
(B) Scan through all three layers of the leaf showing a white
au/- sector in the upper two layers of the leaf. The abaxial
epidermis is au/+. Scale bar: 10 µm.
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