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Fig. 4. Phenotype of dl-1(T65) plants in the vegetative phase. (A)
Wild-type plant in the vegetative phase. (B) dl-1(T65) plant at the
same stage with drooping leaves. (C) Transverse section of the wild-type leaf
blade. The midrib (MR) in the middle of the leaf blade has large clear cells
(arrowhead), and an overall structure that is distinct from that of the
lateral veins (arrow). (D) Transverse section of the dl-1(T65) leaf
blade that lacks a midrib. The vein in the middle of the leaf blade
(arrowhead) resembles the lateral veins (arrow). Bars (C,D), 200 µm.