Permanent tissue

Permanent tissues may be defined as a group of living or dead cells formed by meristematic tissue and have lost their ability to divide and have permanently placed at fixed positions in the plant body. Meristematic tissues that take up a specific role lose the ability to divide. This process of taking up a permanent shape, size and a function is called cellular differentiation. Cells of meristematic tissue differentiate to form different types of permanent tissues. There are two types of permanent tissues:

  • simple permanent tissues
  • complex permanent tissues

Simple permanent tissue

Simple permanent tissue is a group of cells which are similar in origin, structure, and function . They are of three types:

  • Parenchyma
  • Collenchyma
  • Sclerenchyma

Complex permanent tissue

The complex permanent tissue consists of more than one type of cells having a common origin which work together as a unit. Complex tissues are mainly concerned with the transportation of mineral nutrients, organic solutes (food materials), and water. That’s why it is also known as conducting and vascular tissue. The common types of complex permanent tissue are:

  • Xylem (or wood)
  • Phloem (or bast)
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