what is the difference between meristematic and permanent cell
Answers
Answer:
Explanation:
Main Difference – Meristematic Tissue vs Permanent Tissue
Meristematic tissue and permanent tissue are two types of tissues found in plants. The growth of the plant body occurs in two steps; the new cells are produced first, and then these cells are expanded by absorbing water by the vacuole. The cell division only occurs in meristematic tissue but, the expansion can occur anywhere on the plant body. The cell differentiation produces permanent tissue. The main difference between meristematic tissue and permanent tissue is that meristematic tissue consists of young living cells that are capable of continuously dividing and are responsible for the plant growth while permanent tissue consists of specialized cells that have lost their ability to divide and function as protective, conductive, and supportive tissue.
This article looks at,
1. What is Meristematic Tissue
– Definition, Classification, Structure, Characteristics
2. What is Permanent Tissue
– Definition, Classification, Structure, Characteristics
3. What is the difference between Meristematic Tissue and Permanent Tissue
Difference Between Meristematic Tissue and Permanent Tissue - Comparison Summary
What is Meristematic Tissue
The meristematic tissue is a young, immature, undifferentiated cell mass that continuously divides throughout the lifetime of the plant. It can be found at the apex of the stem, leaf primordia, and root. The meristematic tissue is also found in vascular cambium. During cell division, the cells that are separated towards the apex, but remain in the meristem are called initial, and the cells that start expanding are called derivative. Thus, half of the dividing cells remain in the meristem and the rest gradually lose their power of division and become permanent tissue. Meristematic tissue is responsible for the growth and development of the plant body.
Classification of Meristematic Tissue
The meristematic tissue can be classified based on nature of divisions, position, origin, function and plane of division. Based on the position, the meristem can be divided into three types: apical meristem, intercalary meristem, and lateral meristem.
Apical Meristem
The apical meristem occurs at the apex of stem and roots, increasing the length of the plant. In the root, the meristem is situated behind the tip (sub-terminal) and in the shoot, it is terminal. The apical meristem of the root is shown in figure 1.
Difference Between Meristematic Tissue and Permanent Tissue
Figure 1: Root apical meristem
1 – Meristem, 2 – Columella, 3 – Lateral part of the tip, 4 – Dead cells, 5 – Elongation Zone
Intercalary Meristem
The intercalary meristem is the remaining apical meristem that lies between permanent tissues. It occurs at the base of node, internodes, leaf, sheathing leaf of monocots or stipule of dicots.
Lateral Meristem
The lateral meristem lies laterally in the stem and roots, and is involved in the secondary growth. Vascular cambium and cork cambium belongs to the lateral meristem. The cells in the vascular cambium are thin-walled and highly vacuolated. The cork cambium is originated during the differentiation of permanent tissue. It serves as the secondary lateral meristem.
What is Permanent Tissue
A plant tissue that has completed its growth and differentiation and is incapable of dividing is known as the permanent tissue. Cells in the permanent tissue are mature and consist of a defined size, shape, and function. The permanent tissue can be found in every part of the plant body. It is involved in photosynthesis, storing food, conducting nutrients and water, and support.
Classification of Permanent Tissue
The permanent tissue can be divided into three types: simple, complex and special tissues.
Simple Permanent Tissue
The simple permanent tissue consists of similar types of cells, performing similar functions. Parenchyma, collenchyma, and sclerenchyma are the three types of simple permanent tissues. Parenchyma is the most abundant tissue that is mostly isodiametric in shape. It is called potential meristematic tissue. It is also involved in photosynthesis. Parenchyma consists of living cells that are loosely packed. Hence, it serves as the basic packing tissue. Collenchyma provides flexibility and support. It is found in leaf stalks below the epidermis. Sclerenchyma makes the plant hard and stiff. It consists of dead cells with lignified, long and narrow cell walls.
Complex Permanent Tissue
The complex permanent tissue consists of several cell types, acting cooperatively as a functional unit that performs a common function. Xylem and phloem are the two types of complex permanent tissues. Plants which consist of xylem and phloem are called vascular plants.
Answer:
Explanation:
DIFFERENCES BETWEEN MERISTEMATIC TISSUE AND PERMANENT TISSUE:-
•Meristematic tissues have capacity to divide qhere permanent tissue do not have.
•Meristematic tissue have thin cellulose wall whereas permanent tissue has thick cellulose wall.
•Meristematic tissue do not have intercellular space whereas permanent tissue has large intercellular space.
•Meristematic tissues are responsible for the primary and secondary growth of the plants whereas permanent tissue is responsible for various growths.
•Meristematic tissue has dense cytoplasm with prominent nucleus whereas permanent tissue has thin cytoplasm with normal nucleus.
•Meristematic tissues have many small vacuoles in their cytoplasm whereas permanent tissue contain only single large vacuole in their cytoplasm.
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