Plant tissue biography

The main fabrics “grandiose things are made by grandiose means. One nature makes the great gift ” - A. They belong to the most important functions, without which the life of the plant is completely impossible. There is gas exchange with the environment, photosynthesis, storage of nutrients, storage of water. They consist of living parenchymal cells formed from primary meristem - apical apical.

Let's start studying with the classification of the main fabrics. Assimilation tissue of chlorenchyma assimilation - synthesizing. Due to the content of chlorophyll in this tissue, the process of photosynthesis is actively on here, chloroplasts in its cells are built along the walls with one layer, not shading each other, like sunny batteries. The most striking example of the location of this fabric is the column tissue of the pulp fabric pulse fabric, from French.

Chlorenchyma is located directly under the epidermis, this provides its good lighting and gas exchange with the environment. It is found in the aboveground organs of plants, such as leaves, young shoots. But this does not exclude the possibility of its occurrence on illuminated roots, for example, in the roots of aquatic plants, air roots. Airchima air fabric its main function is gas exchange.

It differs, first of all, by the presence of interceters - tissue spaces that serve as a container for gases. Through the stomata, the air of interceters by diffusion is equalized in composition with atmospheric air. In intercatals from atmospheric air, the plant cells absorb carbon dioxide and release oxygen into the cavity, which then enters the environment.

Remember one of the strategically important arrangements of this fabric - the spongy fabric of the sheet. Aerenhim has another significant function - a decrease in the specific gravity of the plant. Imagine the internal environment of the plant, completely clogged with cell mass without any intervals and cavities. If there were no aerenhim, the plants, having turned out to be heavier than the water, drowned and fell to the bottom, not having sufficient strength of mechanical fabric.

Due to the presence of interceters in the fabric, its specific gravity decreases, and it keeps afloat remarkably. And you and I have the opportunity thanks to Aerenhim! In the leaves in the picture below there are cells with Druza - they are intracellular ranges of crystals in vacuoles of plant cells. The storage tissue is the main functions: storage and storage of nutrients: proteins, fats and carbohydrates.

It prevails in fruits, core, bulbs and seeds, tubers and rhizomes. Separately, we note that starch is a spare nutrient substance. The figure below shows the transverse section of the root of the root of the root, the root hairs of the risoderma epibblem are visible. The aquifer of the cells of this tissue differ in a large margin in the vacuoles of mucous substances that hold moisture.

Thus, this fabric helps to retain and storage of water. It is well developed in plants adapted to life in arid places with dry climate. As a rule, they grow in places with a dry climate. When drought, the aquifer of the water gradually gives its reserves of water to other, vital tissues for plants, primarily chlorophyllic parenchyma.

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