1. Simple permanent tissue

Simple permanent tissue is composed of single type of cells which have similar origin, structure and function.

Types of simple permanent tissue

I. Parenchyma

II. Collenchyma

III. Sclerenchyma

Characteristics of parenchyma tissue

Living tissue

Shape: each cell is spherical, oval, rectangular, polygonal, elongated or irregular in shape

Cell wall: thin walled made up of cellulose, hemicellulose and pectin

Young Parenchymatous cells are LOOSELY arranged

Intercellular space : present

Food storage: cell store reserve food material

Parenchyma is found in all parts of plant such as cortex, pith, palisade, mesophyll, flower, seed etc

It is also found in vascular tissues.

Characteristics of collenchyma tissue:

Living tissue

Shape: each cell is somewhat elongated

Cell wall: thick walled due to deposition of hemicellulose and pectin in intercellular space

Intercellular space: present or absent

Characteristics of Sclerenchyma:

Dead tissue

Shape: elongated and pointed at both end

Cell wall: thick and lignified

Cell lack protoplasm

It gives strength and rigidity to the plant body

Function of parenchyma tissue:

Photosynthesis: chlorenchyma contains CHLOROPLAST which HELPS in photosynthesis

Storage: parenchyma cell stores food in the form of starch, PROTEINS, oils and fats.

Buoyancy: helps in floating of aquatic plants due to presence of aerenchyma tissue

Secretion: Idioblastic cell secretes resins, LATEX, tannin, oils etc

Transport: parenchyma of xylem and phloem helps in transport of nutrition and water.

Mechanical support: Prosenchyma tissue provide mechanical support.

Functions of collenchyma tissue

Mechanical support: It is living mechanical tissue

Photosynthesis: It contain chloroplast and carry out photosynthesis.

Function of sclerenchyma tissue

Mechanical support: sclerenchyma is made up of dead and lignified cells which provides support to plants.

Provides hardness to stony fruits such as nuts, coconut, almond etc