 Epidermis-1  |
The Epidermis is the
interface between the plant and its environment.
Consequently, many adaptations have evolved to foster existence in terrestrial ecosystems.
There are four important structures in this image. A= Typical Epidermal cell with wavy
walls; B=Guard Cells; C= stalk of secretory Trichome; D=Secretory Cells of the Trichome. |
Typical Agave Leaves
Agave with Inflorescence
|
 Agave is a plant which
lives in dry (Xeric) ecosystems. Its Epidermis contains several important
adaptations that aid in water retention and light reflection.
This white Agave reflects much of the
solar radiation that reaches it. This helps to prevent overheating.The reflectance is
largely due to Epidermal Wax. |
|
Surface view of Agave epidermis. Note the
shape of the typical cells. Locate the Stomata. The Stomatal Apparatus is composed of
Guard Cells and the Stoma or opening. Subsidiary Cells may also be present. |
 |
Agave Epidermis stained with Toluidine
Blue: A Stomata lies at the center of the Image and is recessed (sunken). The Cuticle is
unstained. |
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