Cuticle of leaf under microscope Photo Tyanna. 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. MEMORY METER. It's function is to prevent the leaf from desiccation (drying out). decrease transpiration rate. It is a waxy layer and does not comprise of live cells. Waxy cuticle. Directly underneath the cuticle is a layer of cells called the epidermis (B). Guard Cells: Mesophyll. Stomata. Lower epidermis layer. A single layer of clear cells that contains stomates and guard cells. - Know the parts of a leaf and their function: waxy cuticle, stoma, guard cells, mesophyll cells (2 types), bundle sheath cells, vascular bundle. Guard cells have also been shown to have numerous ectodesmata. '''Palisade Mesophyll''': Rod shaped cells that contain large numbers of chloroplasts for photosynthesis. The outer part of the leaf is called the cuticle. Remember that the top of the leaf has the protective coating of the cuticle and then a layer of cells known as the upper epidermis. What is the function of the cuticle of a leaf? It consists of the upper and lower epidermis, which are present on either side of the leaf. Here, the cuticle has also been shown to … These cells are located close to the leaf surface to maximise light absorption. The past decade has seen considerable progress in assembling models for the biosynthesis of its two major components, the polymer cutin and cuticular waxes. ... __ _____ are found in the spongy mesophyll layer and function in the exchange of carbon dioxide and oxygen. The outermost layer of the leaf is the epidermis. (Plants that leave entirely within water do not have a cuticle). Cuticle. The leaf of plants in shaded habit has very thin cuticle. The epidermis aids in the regulation of gas exchange. Leaf Structure and Function. Click Create Assignment to assign this modality to your LMS. The cuticle prevents the evaporation of water from the leaf surface. The primary function of the plant cuticle is as a water permeability barrier that prevents evaporation of water from the epidermal surface, and also prevents external water and solutes from entering the tissues. % Progress . On the bottom of the leaf is another protective layer of cells. Leaf Structure and Function. Describes the structure and function of leaves. The answer to this of course was minimising water loss through transpiration, the loss of water through aerial parts of plants. '''Upper Epidermis''': A protective layer of cells that produces the cuticle. Functions. Describes how leaves are made of several different kinds of specialized tissues. A thin, waxy layer that covers the upper epidermis of the leaf, preventing the loss of water. 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