Periderm

The periderm is the layer of plant bark adjacent directly to the integumentary tissue, which has the characteristics of all three main structural elements of the complex body of higher plants and is formed only in ontogenesis.

Functions of the periderm It composes the cover of the above-ground parts of the vegetative organs of the plant. Using special peri structures

Periderm (from the Greek peri “around, around” and derma “skin”) in biology is the layer of epidermis in higher plants and lichens. Historically, the former name of epidermis did not have a clear interpretation and caused some difficulties in interpreting the results obtained. Some researchers were of the opinion that this could be the name for various intermediate layers located under the cuticle of the epidermis, or only for the outer cells or areas of cells. These opinions were refuted by chemical methods of studying the periphery of cells, but until the early 70s of the 20th century. views on the structure of the outer layer of the plant epidermis remained extremely controversial.

The peridermic layer is one of the structural components of the double-membrane cellular structures of eukaryotes, which are inherited from the common ancestor of eukaryotic cells. The outer and inner membranes make up the two-layer shell of any plant cell. In lower plants, there is an organic double layer that allows organic substances, such as leucine, to pass through a variety of proteins, lipids, and other compounds. This double wall is sometimes called the epidermal layer.