What is lignin and what is its function?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Lignin is a complex organic polymer that is deposited in cell walls, making them thick, hard, and impermeable to water. This natural substance is primarily found in sclerenchyma and xylem tissues, providing rigidity and strength to plant structures. Lignification transforms flexible cellulose walls into rigid, waterproof barriers that can withstand compression and provide structural support. Lignin is crucial for allowing plants to grow tall, transport water efficiently through xylem, and resist decomposition. It's the second most abundant natural polymer after cellulose.
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