Collenchyma is a simple permanent tissue in plants. They are living cells with prominent nucleus and all the cell organelles. Each collenchymatous cell is with a large and prominent vacuole in the centre. The vacuole is filled with many secondary metabolites. Unlike parenchyma, the collenchyma cells possess thick primary cell wall. The present article discusses … Read more
The tissue (a group of cells with particular function) composed of single type of cells. Three types of simple tissue system in plants, namely (1). Parenchyma, (2). Collenchyma and (3). Sclerenchyma. The present article discusses the Structure and Types of Parenchyma Cells in Plants. Characteristics of Parenchyma (Parenchymatous Cells) Ø Parenchyma is a simple permanent tissue. … Read more
P Proteins (Phloem Proteins) are a category of proteins found in the sap of the sieve tubes of the phloem of Angiospermic plants. P-proteins were also as called ‘slime bodies’ of ‘slime’ in the old literature. P proteins are usually found in the phloem of dicot plants. P Protein Characteristics of P Protein Ø P … Read more
Phloem is a complex tissue system in plants. It is the food conducting tissue of vascular plants. Together with xylem, they form the vascular tissue system. The phloem composed of several types of cells among which some are living cells and some are dead. The term ‘phloem’ was introduced Nageli (1853) from a Greek word … Read more
What are Tyloses? Tyloses (singular – tylosis) are the balloon like outgrowth of parenchymatous cells to the lumen of tracheids or vessels of the secondary xylem. The axial and ray parenchyma of the xylem develops protrusion and these protrusions enter or invade into the lumen of tracheids or vessels through pits. This invasion of parenchyma … Read more