MERISMATIC TISSUE The cells of meristematic tissue have the power of division, which mean these are the dividing tissues of the plant. On the basis of osition theu are divided into 3 ares:-- In meristematic tissues, the cells are highly active, have dense cytoplasm, Large nucleus, thin cutoplasm and vacuole smaller in size or may be absent. APICAL INTERCALARY LATERAL .The new cells produced by meristematic cells are initially tike meristem but later on maturation they differentiate into other tissues.
APICAL Present at the tip (growing region) of the plant's stem and root. APICAL It helps the plant to grow in length. MERISTEM INTERCALARY MERISTEM INTERCALARY . Present at the base of the leaves or internodes on twigs LATERAL MERISTEM LATERAL Mcristematictissues in plants It helps to increase the qirth (thickness) of stem and root in the plants.
PERMANENT TISSUE The meristem after attaining maturition Loses their ability to auwl forw ferwk eue tu divide and take up a specific role rol GROUND TIGSUE 7XYLEM TISSUE The p rocess in which the meristematic tis sues take a DERMAL TISSUE PERMANENT TISSUES permanent shape, size and function is known as differentiation. This implies the cells ot meristematic tissues differentiate to form different types of permanent tissues.
SIMPLE PERMANENT TISSUE The simple permanent tissues are made of similar cells performing similar functions. SIMPLE PERMANENT TISSUES PARENCHYMA CoL COLLENCHYMA SCLERENCHYMA These are the basic packaging tissues in the plants,
PARENCHYMA . Consist of live unspecialized cells having thin cell wal They are loosely packed and have large intercellular space (space between the cells). Provides support to the plant and present in all parts like roots, stems, leaves, fruits and seeds. > L VING CELLS INTERCELLULAR Storage of food (eg. Fruits) and water (in stems eg. Sometimes, Ehese tissues also contain chlorophyll an In case of aquatic plants, parenchyma is modified into Aerenchyma is the tissues having Large air cavities which SPACE cactus) is the main function. Transverse section of parenchyma perform phobosynthesis, and knousn as chlorenchyma erenchyma provides buoyancy to the plants and help them to float.
COLLENCHYMA The cells of the tissue are living, elongated, and have irregularly thickened corners. WAL THICKENINGs NU CLEus The term was coined by Schleiden. . It provides flexibiLity and VACUOLE mechanical support to the plants They have a little intercellular space. It allows easy bending of plants Transverse section of collenchyma (leaf and stem) without breaking.
SCLERENCHYMA The tissues are dead which makes the plant hard and stiff (eg. Husk of coconut). Structurally they are long and narrow. The walls of the cell are thick due to the presence of Lignin. SIMPLE PITS Transverse scction ofsclerenchyma They lack intercellular space. hese tissues are present in stem, covering of seeds, nuts, around the veins of the leaves, around vascular bundles.
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