Q- Enlist the position, nature of cells and functions of three types of simple permanent tissues of plants.
Answer- The Simple permanent tissue is mainly of three types:
1. Parenchyma:
Parenchyma are mainly found in most soft parts of the plant such as: epidermis, cortex, endodermis, pericycle, pith of roots of plants or trees. Parenchyma is thin walled and living tissue. Parenchyma is responsible for many important functions in the plant but the main function of parenchyma is to store food (such as starch grains in the parenchymal cells of potato tuber).
2. Collenchyma:
Collenchyma are mainly found in hypodermis of dicot stem and also found in midrib and leaf stalks of plants or trees. Collenchyma is thick walled and living tissue. Collenchyma is responsible for many important functions in the plant but the main function of Collenchyma is to provide mechanical support to the plant or tree. It also allows plants to bent easily that prevent them from being uprooted by high velocity wind.
3. Sclerenchyma:
Sclerenchyma are mainly found in the hypodermis of monocot stem, husk of coconut, covering of seeds and nuts in in the veins of leaves around vascular bundle. Sclerenchyma is thick walled and dead tissue. Sclerenchyma is responsible for many important functions in the plant but the main function of Sclerenchyma is to provide the plant mechanical support (chief mechanical tissue), so also enables the plant to resist various strains.