Introduction
The epidermis is the layer , one cell thick, that covers the whole of the primary plant body . Its basic function is to protect the plant from desiccation and infection .
( Sourced by Biological Science 1 by D.J.Taylor, N.P.O.Green, G.W.Stout and R.Soper. ( Publish by Cambridge University Press )( Pages 170 )
The epidermal tissue includes several differentiated cell types: epidermal cells, guard cells, subsidiary cells, and epidermal hairs (trichomes). The epidermal cells are the most numerous, largest, and least specialized. These are typically more elongated in the leaves of monocots than in those of dicots.
At intervals , specialized epidermal cells called guard cells occur in pairs side by side , with a pore between them
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The structure of the stomata consists of a kidney-shaped guard cell with an opening in the center known as the pore. The guard cells are specialized epidermal cells that is responsible for regulate the opening and closing of stomata. The lower epidermis has more stomata than the upper epidermis in most types of leaves. The mean number of stomata per field of view of the lower epidermis of Commelinacommunis in this experiment was 3.7.
References
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The epidermis, which is the outer layer of the skin, is made up of four to five layers in some parts (Shier, Butler, & Lewis, 2009). In the majority of the areas, just four layers can be differentiated: the stratum basale, stratum spinosum, stratum granulosum, and stratum corneum (p.119). Another layer is the stratum lucidum which can be found in the thicker part of the skin of the palms and ...
The methods used for this lab came from Leady, B. (2014) Fundamentals of Life Science Lab Manual. Toledo, Ohio: University of Toledo. No changes were made.
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The above information was taken from Biology, Neil Campbell, et. al., New York: Addison Wesley, 1999, p.316.