Describes the structure and function of leaves. The plant cuticle is an extracellular hydrophobic layer that covers the aerial epidermis of all land plants, providing protection against desiccation and external environmental stresses. Leaf Structure and Function. A thin, waxy layer that covers the upper epidermis of the leaf, preventing the loss of water. decrease transpiration rate. It is a waxy layer and does not comprise of live cells. Stomata. The past decade has seen considerable progress in assembling models for the biosynthesis of its two major components, the polymer cutin and cuticular waxes. The epidermis is is also transparent and very thin to allow maximum light penetration. Here, the cuticle has also been shown to … Lower epidermis layer. ... __ _____ are found in the spongy mesophyll layer and function in the exchange of carbon dioxide and oxygen. The epidermis aids in the regulation of gas exchange. The upper epidermis has a thick cuticle layer but … The answer to this of course was minimising water loss through transpiration, the loss of water through aerial parts of plants. The outermost layer of the leaf is the epidermis. Cuticle of leaf under microscope Photo Tyanna. It consists of the upper and lower epidermis, which are present on either side of the leaf. What is the function of the cuticle of a leaf? Leaf Structure and Function. Guard cells have also been shown to have numerous ectodesmata. It's function is to prevent the leaf from desiccation (drying out). Cuticle. (Plants that leave entirely within water do not have a cuticle). The outer part of the leaf is called the cuticle. On the bottom of the leaf is another protective layer of cells. The leaf of plants in shaded habit has very thin cuticle. These cells are located close to the leaf surface to maximise light absorption. Guard Cells: Mesophyll. A single layer of clear cells that contains stomates and guard cells. '''Upper Epidermis''': A protective layer of cells that produces the cuticle. Click Create Assignment to assign this modality to your LMS. Functions. '''Palisade Mesophyll''': Rod shaped cells that contain large numbers of chloroplasts for photosynthesis. So what used to be considered the main function of the cuticle? - Know the parts of a leaf and their function: waxy cuticle, stoma, guard cells, mesophyll cells (2 types), bundle sheath cells, vascular bundle. Describes how leaves are made of several different kinds of specialized tissues. For instance, as compared to the rest of a leaf, the cuticle of guard cells is more permeable to water vapor which in turn influences their activities/functions. Waxy cuticle. % Progress . The outer surface of the leaf has a thin waxy covering called the cuticle (A), this layer's primary function is to prevent water loss within the leaf. Directly underneath the cuticle is a layer of cells called the epidermis (B). 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