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Pleomorphism of Lysosomes

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  Pleomorphism of Lysosomes Lysosomes show pleomorphism, which means they occur in many different forms according to their functional state. They are not always identical in shape, size, or contents. Their appearance changes depending on whether they are newly formed, involved in digestion, or storing undigested waste materials.  Lysosomes are membrane-bound organelles containing hydrolytic enzymes. These enzymes digest proteins, lipids, carbohydrates, nucleic acids, and other cellular materials. Since lysosomes perform different digestive functions inside the cell, they appear in different structural forms. This property is called pleomorphism.  The main pleomorphic forms of lysosomes are primary lysosomes, secondary lysosomes, autophagic vacuoles, and residual bodies. Primary lysosomes are newly formed lysosomes produced by the Golgi apparatus. They contain inactive hydrolytic enzymes and have not yet taken part in digestion. They are small, spherical vesicles surround...
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Morphology of Psilotum

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Morphology of Psilotum 1. Introduction to Psilotum Psilotum belongs to the family Psilotaceae and order Ophioglossales of the vascular plant division (Pteridophyta). It is the only genus of the family Psilotaceae. In total, there are about 18 species of Psilotum belonging to the genus, out of which 2 occur in India viz., P. nudum and P. triquetrum. The plants of this genus are popularly known as whisk ferns, as they resemble the whiskers of some animals. Psilotum species are unique plants with small, leaf-like stems that absorb water and nutrients. They are classified as vascular plants with xylem and phloem, but lack most features common to vascular plants. Unlike other vascular plants, species of this genus do not have true leaves, roots or flowers. Instead of conventional green leaves, they have flattened photosynthetic branches that perform photosynthesis and help in the growth of new branches. Flora of Psilotum exist in two different forms. Some are terrestrial, found in rainfore...
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