What Are Tissue Salts?

Conducting tissue ( conducting tissue ), also known as vascular tissue, is a composite tissue formed by a variety of tissues. It is the main organization responsible for long-distance transportation of materials in plants and is a unique organization of higher plants. The transportation of water, inorganic salts and organic matter, and the redistribution and transfer of substances often carried out between various parts of the plant body, must be carried out through the transduction tissue. According to the composition of transportation, it is divided into xylem and phloem. ^[1]

Conducting tissue: It is the main tissue in the plant responsible for long-distance transportation of materials. Its cells are tubular and connected up and down to form a continuous transport channel. The conduction tissue is often bundled with the mechanical tissue and runs up and down in various organs of the plant. It includes conduits, tracheids for transporting water and inorganic salts, and sieve tubes, tracheids for transporting organic matter. ^[2]

It is a composite tissue composed of wood fibers, parenchyma cells, duct molecules and tracheids. Undertake the function of transporting water and substances dissolved in water. The route of transport is one-way, from roots through stems to leaves. In addition to thin-walled cells and fibers in the xylem, there are two types of cells with transport functions, namely duct molecules and tracheids. ^[1]

It is a composite tissue, including sieve tube molecules or sieve cells, companion cells, parenchymal cells, fibers and other types of cells, which carry the function of transporting organic matter from top to bottom or in all directions. Directly related to the transport of organic matter is sieve tube molecules or sieve cells ^[1]

Sieve molecule

The sieve tube molecule is a tubular cell that is connected vertically in the plant body to form a long row of cells, called a sieve tube. The sieve molecule has only a primary wall and the main components are pectin and cellulose. The nucleus of the sieve tube molecule disintegrates after maturation and becomes a special kind of non-nucleated living cell. The end walls of the upper and lower adjacent cells are specialized into sieve plates with many small holes on them, called sieve holes. The cytoplasm of the two cells is connected to each other through the sieve. The situation is similar to the intercellular filaments, but it is thicker and is called a contact. The transportation of organic matter is achieved through this close connection between the sieve molecules. The side of the sieve tube molecule has many specialized primary pits and fields, called sieve domains, which have thicker protoplasts than the intercellular filaments, which allows the sieve tube molecules to communicate more closely with the cells on the side. ^[1]

Sieve cells

Sieve cells are units that transport organic matter from ferns and gymnosperms. The main difference between it and the sieve tube molecule is that the end wall of the cell is not specialized into a sieve plate, and there is no companion cell on the side of the slender sieve cell, so the transduction efficiency is lower than that of the sieve tube. ^[1]