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Figure 1


Fig. 1. Adaxial-abaxial leaf architecture. (A) The adaxial side of an Arabidopsis leaf is dark green and trichome rich, whereas the abaxial leaf surface is matte, grey-green and trichome poor. (B) The adaxial and abaxial sides of a maize leaf blade (b) and sheath (s) are separated by the auricle (a) and the ligule (l), an adaxial, epidermal fringe. (C) Transverse section of an Arabidopsis leaf, showing adaxial palisade cells (p), abaxial spongy mesophyll cells (s) and the central midvein (mv). (D) Magnified cross-section of a vascular bundle in an Arabidopsis leaf, showing the spatial relationship between adaxial xylem (x) and abaxial phloem (ph). Images C and D, which were first published by Lin et al. (Lin et al., 2003), are reproduced with permission from the American Society of Plant Biologists.





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