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Ground tissue


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Ground tissue

  1. 1. GROUND TISSUE Simple Permanent Tissue Prepared by: Kristel V. Feje – BSED Bio Sci
  2. 2. Permanent Tissue  Perform specific functions.  No ability to divide.  Has permanent shape, size and function.  Differentiation is a process by which cells formed by meristematic tissue become a permanent tissue.  Differentiated cells are called Derivatives.
  3. 3. Parenchyma Collenchyma Sclerenchyma
  4. 4. Permanent Tissue types: A. Simple Permanent Tissue  Tissues which are made up of similar type of cells. B. Complex permanent Tissue  Tissues made up of many cells.
  5. 5. 1. Parenchyma Characteristics  Basic packing tissue  Unspecialized live cells  Has thin cell wall  Has large intercellular spaces.
  6. 6. Function  Support to plants.  Stores food  Stores nutrients and water.
  7. 7. Types a. Chlorenchyma  Parenchyma with chlorophyll  Tissue which contains chlorophyll pigment.  Helps in photosynthesis. b. Aerenchyma  Parenchyma with air cavities in aquatic plants.  Helps in floating.
  9. 9. 2. Collenchyma Characteristics  Tissue responsible for flexibility in plants.  Supporting and strengthening tissue.  Irregularly thickened at corners, thickened by pectin.  Less intercellular spaces.
  10. 10. Where are they found?  Leaf stalks below epidermis.  Expanded leaves.  Stem apex Function  Allows bending of stems, leaves without breaking.  Provide mechanical support.
  11. 11. 3. Sclerenchyma  Tissue responsible for stiffness in plants.  Long, narrow and dead cells.  Thickened cell walls made of cellulose impregnated with lignin.  Simple pits are present in thickened cell walls.  No intercellular spaces. Characteristics
  12. 12. 2 types of sclerenchyma cells.  Sclereids  Fibres Where are they found?  Hard covering of seeds and nuts.  Veins of leaves  Stem around vascular bundles.
  13. 13. Function  Provides strength to plant parts  Provides mechanical support.
  14. 14. PARENCHYMA COLLENCHYMA SCLERENCHYMA Cells Living Living Dead on maturity Intercellular space Large Less Absent Cell wall Thin Irregularly thickened at corners Thickened with pectin Thickened with lignin Function  Packing tissue  Photosynthesis in leaves  Storage of food and nutrients  Flexibility  Stiffness  Support and protection