gyökérszövetek

Gyökérszövetek are the fundamental tissues that constitute the root of a plant. These tissues are responsible for anchoring the plant, absorbing water and nutrients from the soil, and storing food reserves. The primary tissues found in a root are epidermis, cortex, and stele. The epidermis, also known as the rhizodermis, is the outermost layer of cells and is often characterized by root hairs, which significantly increase the surface area for absorption. Beneath the epidermis lies the cortex, a region composed primarily of parenchyma cells. These cells serve functions such as storage of starch and other organic substances, as well as some degree of support. The innermost layer of the cortex is the endodermis, which contains Casparian strips that regulate the passage of water and dissolved substances into the vascular cylinder. The stele, or vascular cylinder, is the central core of the root and contains the vascular tissues, xylem and phloem. Xylem is responsible for transporting water and minerals from the roots to the rest of the plant, while phloem transports sugars produced during photosynthesis from the leaves to the roots. In some plants, pericycle, located just inside the endodermis, is also considered part of the stele and is involved in the formation of lateral roots. The specific arrangement and development of these tissues can vary between monocotyledonous and dicotyledonous plants.