(Structure, Types and Functions of Collenchymatous Cells in Plants)
What is collenchyma?
Ø Collenchyma is a simple permanent tissue in plants.
Ø They are living cells with prominent nucleus and all the cell organelles.
Ø Each collenchymatous cell is with a large and prominent vacuole in the centre.
Ø The vacuole is filled with many secondary metabolites.
Ø Unlike parenchyma, the collenchyma cells possess thick primary cell wall.
Ø Thick walls are NOT lignified.
Ø The thick wall is due to the deposition of hemicellulose and pectin along with cellulose.
Ø Wall thickening in collenchyma is greatly affected by the extent of mechanical stress.
Ø A plant part which in severe stress or motion due to high wind are more likely to possess more thickened collenchyma.