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Upper epidermis

Biology  Untranslated region  Upstream
04/24/2014

Upper epidermis - Consists of a single layer of cells found on the upper surface of the leaf. It is covered by a thick waxy cuticle. The main function of the upper epidermis is water conservation.


Upper epidermis. This is a single layer of cells containing few or no chloroplasts. The cells are quite transparent and permit most of the light that strikes them to pass through to the underlying cells.

Dicotyledons usually have more stomata on the lower epidermis than the upper epidermis. As these leaves are held horizontally, upper epidermis is directly illuminated. Less number of stomata on the upper epidermis can then prevent water loss.

columbar cells with chloroplasts in the mesophyll tissues of leaves, just below the upper epidermis
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
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Palisade wall a type of cell found just beneath the upper epidermis pf a leaf
Palmitoylation a process by which a protein can be attached to a membrane, which can be the plasma membrane or an intracellular membrane ...

palisade The vertical photosynthetic cells below the upper epidermis in leaf tissue; these cells are a specialized parenchyma.

For instance, the cells in the layer just beneath the upper epidermis (closest to the incoming sunlight) are lined up like the logs driven into the ground to construct the stockade of a frontier fort.

palisade Layer of mesophyll cells in leaves that are closely placed together under the epidermal layer of the leaf. Palisade parenchyma: Columnar cells located just below the upper epidermis in leaves the cells where most of the light ...

The epidermis is usually transparent (epidermal cells lack chloroplasts) and coated on the outer side with a waxy cuticle that prevents water loss. The cuticle may be thinner on the lower leaf epidermis than on the upper epidermis; ...

See also: See also: Epidermis, Cells, Stoma, Leaf, Photosynthesis

Biology  Untranslated region  Upstream
04/24/2014

 
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