Definition - What does Lignins mean?

Lignins are organic substances which are one of the classes of complicated organic polymers. They are one of the essential classes of the structural materials supporting the tissues of algae and vascular plants. They are important for the formation of cell walls, mainly in bark and wood as they don't rot easily and lend rigidly. They are chemically cross-linked polymers of phenol and are two main categories – Lignins which are sulfur free and others which contain sulfur.

Petropedia explains Lignins

The components of cell walls of about all dry land plants are known as Lignins. They are considered as one of the most copious natural polymers present in the world. Out of all the polymers present in the cell wall of plants, Lignins are the only polymers which do not contain carbohydrate monomers. They work together with cellulose to provide the structural functions in plants, analogous to glass fibers and epoxy resin in fiberglass boat. They also have other essential biological roles in the plants, e.g., they can also be used as effective hurdles against attacks by fungi and insects.

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