What is the structure and function of a cuticle?
In some higher plants, the cuticle is a water-impervious protective layer covering the epidermal cells of leaves and other parts and limiting water loss. It consists of cutin, a waxy, water-repellent substance allied to suberin, which is found in the cell walls of corky tissue.
What is the structure and function of a cuticle quizlet?
A waxy cuticle covers all aerial surfaces of land plants to minimize water loss. Their main function is to allow gases such as carbon dioxide, water vapor and oxygen to move rapidly into and out of the leaf. Phloem is the vascular tissue responsible for the transport of sugars from source tissues (ex.
What is the role of cuticle?
The primary function of the cuticle acts as a permeability barrier in plants to prevent the evaporation of the water from the outer epidermal surface. Along with this, it prevents the entering of the water molecules and the solutes from the external environment.
Why does cuticle have a shiny and waxy structure?
A primary function of the leaf’s waxy cuticle is to reduce water loss through the leaves, which is particularly important in arid deserts with little rainfall or Mediterranean climates with seasonal rainfall. The cuticle helps seal in the water, making the leaves virtually waterproof.
What is the structure of the cuticle quizlet?
A waxy covering on the surface of stems and leaves that acts as an adaptation to prevent desiccation in terrestrial plants. Pairs of cells that surround stomata and control their opening and closing.
Which structure in the cuticle helps control water loss from the leaf?
The epidermis secretes a waxy cuticle of suberin, which restricts evaporation of water from the leaf tissue. This layer may be thicker in the upper epidermis compared to the lower, and in dry climates compared to wet ones.
Why is the cuticle important to the plant?
Plant cuticle is the outermost layer of plants, which covers leaves, fruits, flowers, and non-woody stems of higher plants. It protects plants against drought, extreme temperatures, UV radiation, chemical attack, mechanical injuries, and pathogen/pest infection.
What is the role of the cuticle and stomata?
The water-resistant cuticle traps all of the plant’s valuable water inside, where it belongs. Stomata are pores in the plant’s epidermis that allow the plant to breathe.
What is the function of the cuticle on the plant leaf epidermis?
What is the function of the cuticle in plants quizlet?
function of the cuticle: protect and cover upper and lower leaf surfaces, prevent water loss and seepage.
Is the cuticle a part of the epidermis?
In many invertebrates the dead, noncellular cuticle is secreted by the epidermis. This layer may, as in the arthropods, contain pigments and chitin; in humans the cuticle is the epidermis. In some higher Cuticle, the outer layer or part of an organism that comes in contact with the environment.
What makes up the cuticle of a plant?
In some higher plants, the cuticle is a water-impervious protective layer covering the epidermal cells of leaves and other parts and limiting water loss. It consists of cutin, a waxy, water-repellent substance allied to suberin, which is found in the cell walls of corky tissue. Cutin is especially noticeable on many fruits— e.g., apple,…
What is the structure and function of an insect cuticle?
STRUCTURE AND FUNCTIONS OF INSECT CUTICLE AND MOULTING. Insect body wall is called as Integument or Exoskeleton. It is the external covering of the body which is ectodermal in origin. It is rigid, flexible, lighter, stronger and variously modified in different body parts to suit different modes of life.
How is the alae different from the rest of the cuticle?
The alae are distinct from the rest of the cuticle both in protein composition and ultrastructure. The dorsal and ventral cuticle has a gross multilayered ultrastructure, the detail of which varies at different developmental stages ( Cox et al., 1981c; Peixoto and Desouza, 1995; Peixoto et al., 1997 ).