Differentiate between parenchymatous and collenchymatous tissues with the help of a diagram.
Answers
Answer:
A cluster of similar cells performing the same, specialized function is known as a tissue. Since plants are multicellular enclosing a huge number of cells, each performing an activity. Plant tissues are typically of two types – Meristematic and Non-meristematic or permanent tissues. Permanent tissues furthermore are divided into simple permanent tissue and complex permanent tissue.
Simple permanent tissues are furthermore classified into – parenchyma, collenchyma and sclerenchyma. In this article – we focus on the differences between parenchyma and collenchyma.
Parenchyma Cells
These are the living plant cells known to repair and heal and also to store food, forms a thin layer known as primary cell wall of the plant. They occur as a continuous mass, widely distributed from stems, roots to leaves and fruits
Generates other special cells and tissues
Isodiametric in shape, having thin cell walls hence experience pressure and force around the cells, therefore, cells increase its volume capacity to equalize all-over pressure on the cells
Cells composed of cellulose and hemicellulose
Show abundance in cell organelles such as – Golgi bodies, ribosomes, Chloroplast, Endoplasmic Reticulum, and other constituents such as pigments, fats, starch, proteins.
Collenchyma Cells
Known to render mechanical support to plants by protecting the delicate inner structure of plants
They have thick cell walls composed of cellulose, hemicellulose and pectin and are living cells. Cells comprise of prominent nucleus and organelles
It carries out storage of food, checks for the tearing of leaves, carry out photosynthesis. They also push the organs of plants thus aiding in growth and elongation
Difference Between Parenchyma and Collenchyma Cells
Listed below are some differences between these cells:
Parenchyma Cells Collenchyma Cells
What it means
Originate from ground and protoderm meristems Originate from pro-cambium. Epidermal layer of plants are composed of collenchyma cells
Location
Found in every delicate plant part Specifically found in leaves, stems and petioles
Cell type
Living and unspecialized cells Living and specialized cells
Shape of the cell
Isodiametric generally, may vary in shape Elongated cells
Cell wall
Present and thin-walled
Made of cellulose
Present, uneven cell wall
Made of pectin and hemicellulose
Intercellular spaces
Present between cells Less space present
Function
Food storage
Gaseous exchange
Photosynthesis
Renders mechanical support
Elasticity
Explanation:
Answer:
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Explanation:
(Parenchyma)
1. Primary cell wall is present. (Collenchyma) 1. Primary cell wall is present.
(Parenchyma )2. Parenchyma cells have thin cellulosic/hemicellulosic cell wall and normally do not show secondary wall thickening. ( Collenchyma )2. Collenchyma tissue has thick non-lignified walls with irregular cellulose thickening that provide mechanical support and tensile strength to the growing organs.