KOMPAS.com – Adult tissue is plant tissue that has finished experiencing growth.
In adult tissue, cells have stopped dividing and have formed completely based on their functions.
Adult tissue is composed of protective tissue, parenchyma tissue, reinforcement network, and transport network. Check out the explanation as summarized from Encyclopaedia Britannica!
Protective tissue is a network that protects the inside of the plant from the outside environment.
The protective tissue is composed of epidermal tissue and cork tissue.
Epidermis tissue is the tissue that covers all parts of the plant or can be said to be the outer skin of the plant.
From the picture it can be seen that the epidermal tissue is composed of very dense cells without any space between cells.
This allows the epidermal tissue to protect plants from water loss as well as physical injury caused by the external environment.
Cork tissue is the tissue that is formed when the epidermal tissue is damaged. If the epidermal tissue is damaged, cork tissue will soon form to cover and protect the interior of the plant.
Parenchyma tissue is the basic tissue forming the plant body. Parenchyma tissue has thin-walled round cells and is found in all parts of the plant.
The cells in the parenchyma tissue are not specialized so that they can adapt their function according to the place where the tissue is located. Therefore, parenchyma tissue has many functions.
The air parenchyma network is composed of sparse cells so that there is plenty of space between these cells.
This space between cells allows gas transport in the parenchyma tissue.
Food parenchyma tissue can store food reserves in plastids. Transport parenchyma functions to transport substances in plants.
Reinforcing tissue is a network that functions as a support for the plant body. The reinforcing network consists of collenchyma and sclerenchyma networks.
Collenchyma tissue is a plant-reinforcing tissue that exists before the formation of wood tissue or when cells are still actively dividing.
Collenchyma is composed of long, thick-walled cells. The cell wall is made up of pectin and cellulose.
Because it is present in the meristem tissue, collenchyma tissue has dense cells without space between cells because it is still growing.
Sclerenchyma tissue is a plant-reinforcing network found in plant parts that have stopped dividing (adult tissue).
Sclerenchyma is composed of dead cells with thick thick walls formed from lignin (wood cells). Sclerenchyma cells are very rigid and are found on the bark or mature wood.
As the name suggests, the transport network functions as a transportation system for minerals, water, and photosynthetic products. The transportation of this substance has two ways, namely the xylem vessels and the phloem vessels.
Xylem is a vessel that functions to deliver water and minerals that are absorbed from the roots up to the leaves and other plant parts.
Phloem is a vessel that functions to transport the photosynthetic products of leaves throughout the plant body. The cells that make up the phloem are long and have holes pressed together to resemble fibers.