dorsiventral leaf

dorsiventral leaf

the leaf type, found mainly in DICOTYLEDONS, with a structure that changes from dorsal (upper) surface to ventral (lower) surface. The major areas are: an upper EPIDERMIS with no stomata; a palisade MESOPHYLL layer below which is spongy mesophyll with large intercellular spaces; a lower epidermis with irregularly spaced STOMATA. Such leaves are generally held horizontally.
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Cotyledons (Figure 4A and C) of the three species consist of uniseriate, glabrous and amphistomatic epidermis, and dorsiventral leaf with a layer of palisade parenchyma and bi- or multiseriate spongy parenchyma.