Classify the different tissues present in plants.
Answers
Answer:
Explanation:
The three types of plant cells are found in each of the major types of plant tissues: dermal, ground, and vascular tissues. Dermal tissue covers the outside of a plant in a single layer of cells called the epidermis. It mediates most of the interactions between a plant and its environment
Answer: Types Of Meristematic Tissue: -
1. Apical Meristem
Location- This type of meristem is found in growing tips of stem and roots.
Function-This tissue helps in increase in length of the plant.
They are present in growing tip of stems and root and increase the length of the stem and the root
2.Lateral Meristem
Location- This type of meristem is found on sides of stem and roots.
Function- This tissue help in the plant's increase of the diameter and girth.
3. Axillary Meristem (or intercalary meristem)
Location- This type of tissue is found at the base of leaves or internodes.
Function-This tissue helps in increase of the length of organs like leaves and internodes.
SIMPLE PERMANENT TISSUE
This type of tissue are made of one type of cells, which are similar in origin, structure and function. Simple permanent tissues are of three types,
Parenchyma
Collenchyma
Sclerenchyma
PARENCHYMA
CHARACTERISTICS- it is the basic packaging tissue that fills the spaces between other tissues and is found most abundantly in plants.They have unspecialised/ undifferentiated cells with thin cell walls made of cellulose. they have large intercellular spaces as the cells are loosely packed. Cells have dense cytoplasm and nucleus and large vacuole.
FUNCTION- This tissue provide support to plants and parenchyma of stem and roots stores nutrients and water and is called as STORAGE PARENCHYMA. when it contains chloroplast having chlorophyll and performs photosynthesis, it is called CHLORENCHYMA. In aquatic plants, parenchyma has large air spaces to provide buoyancy to plants to help them float and exchange gases, it is called AERENCHYMA. Isolated parenchyma cell or group of cells are capable of producing the whole plants.
LOCATION- This type of tissue found in non woody or soft parts of roots,stem,flowers,leaves and fruits.
COLLENCHYMA
CHARACTERISTICS- The cells are living, elongated and irregularly thick at the corners made of cellulose or pectin they have very less or no intercellular spaces. The cells have a nucleus, dense cytoplasm and Large. the wall has large amount of hemicellulose and pectin in addition to cellulose. The lignin is not present.
FUNCTIONS- These cells provide flexibility (elasticity) and mechanical support to the aerial parts of the plants and allows them to bend.
LOCATION- This type of tissue is found in leaf stalks, below epidermis of leaves and stem.
SCLERENCHYMA
CHARACTERISTICS- The cells are long, narrow thick walled due to deposition of lignin. Such cell walls are called as lignified walls and have pits. These cells lack intercellular spaces due to deposition of lignin. The cells do not have a nucleus and cytoplasm and are dead.
FUNCTIONS -These cells provide rigidity and strength to plants and makes it hard and can bear stress and strains.
LOCATION- This type of cells are found in stems,around vascular bundles,in the veins of leaves.
COMPLEX PERMANENT TISSUE
This type of tissue is made up of more than one type of cells that have a common origin and work together to do a common function. Its function is to transport water,minerals and food to all parts of the plant. Complex permanent tissue is of two types,
1 Xylem
2 Pholem