A plant tissue is a group of cells that perform similar functions and form a transition zone between a cell and a complex organ.
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Plant tissues are groups of cells that are similar in their origin and their structure and perform similar functions. They are a collection of similar cells that perform organized functions for their plants. They are specialized for a unique purpose, and they can be combined with other tissues creating organs like flowers, stems, leaves, roots, etc. There are also different types of tissues, including meristematic and permanent tissues, explained below.
The word tissue comes from the French word " tissue," which means to weave. Plant tissue is a biological organizational level that transitions between cells and complex organs. They are clusters of cells that work together and attain specific functions. In plants, tissues can be classified broadly into 3 categories, they are:
Epidermal tissue: Cells that form the outer space of the plant leaves and the younger plants.
Ground tissues: These tissues manufacture nutrients by the process of photosynthesis and store reserve nutrients.
Vascular tissues: The prime components of this type are the xylem and phloem. These tissues transport the nutrients and fluids internally.
Tissues can be divided into meristematic tissues and permanent tissues.
These tissues can divide and re-divide, forming new cells through the process of mitotic cell division. These newly formed cells will be similar to the parent cells, but they start to differentiate when they grow, and their characteristics keep changing. They assist in the major growth of the vegetation through growth in length and diameter.
The cells of meristematic tissues have a thin primary cell wall made up of cellulose. Each cell also has a dense cytoplasm and a nucleus with few vacuoles. They are generally oval, rectangular, or polygonal in shapes.
Meristematic tissues are generally cramped, and there are no intercellular spaces. Depending on where they occur, they are divided into:
Apical meristem: These occur at the growing tips and apicals of roots and stems. They raise the length of the plant.
Lateral meristem: These occur in the radial parts of the stems and roots. They increase the thickness of plants.
Intercalary meristem: They occur at the internodes and basis of leaves. They raise the size of the internode.
These are a group of living or dead cells usually formed by the meristematic tissues. They generally lose their ability to divide, thus becoming permanent tissues. They are matured meristematic cells. As they have lost their ability to divide, they take up permanent shares, sizes, places, etc. This process of taking up the permanent shape, size, etc., is called cellular differentiation. There are two types of permanent tissues: simple permanent tissues and complex permanent tissues.
Simple Permanent Tissues These tissues have groups of cells that are similar in function, structure, and origins. They are further classified into:
Complex Permanent Tissues These tissues are made up of more than one type of cell with a common origin and work together to perform similar functions. They help transport mineral nutrients, organic food material solutes, water, etc. Hence, they are also known as conducting and vascular tissues. These are divided into 2 types of tissues, they are:
The last type of plant tissue is protective tissues, and they provide support and fortification to plants. There are 2 types, cork and epidermis.
Cork: It is an external type of protective tissue. These cells are lifeless and lack intercellular gaps. The walls of the cells are coagulated with suberin. The main function of suberin is it makes the plant impervious to gas and other water molecules.
Epidermis: This is a cell made up of an outer casing throughout the structure of the plants. The stomata merge with this layer at certain places.
Plant tissues are groups of cells that are similar in their origin, structure and perform similar functions.
They are a collection of similar cells that perform organized functions for their plants and are specialized for a unique purpose
Plant tissues can be classified broadly into 3 categories: Epidermal tissue, ground tissues, and vascular tissues.
Tissues can be categorized into meristematic tissues (can divide and redivide) and permanent tissues (cannot divide).
1. What are the types of tissues in plants?
The types of tissues in plants are Meristematic tissues, Simple permanent tissues, Complex permanent tissues, and protective tissues.
2. What are the 3 types of simple permanent tissues?
They are Parenchyma, Collenchyma, and Sclerenchyma.
3. What is an example of plant tissue?
Epidermis tissue is an example of a plant tissue that covers the outer surface of the plant and controls exthe change of gases.
4. What are the 3 main types of tissues?
The 3 main types of tissues are Epidermal tissues, vascular tissues, and ground tissues.
5. What are the tissues in a leaf?
The 3 main tissues in leaves are epidermal, vascular tissues, and ground tissues.
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