The primary function of cellulose in plants is to provide structural support. As a key component of the cell wall, cellulose helps maintain cell rigidity and integrity, allowing plants to withstand various mechanical stresses. Composed of linear chains of glucose molecules, cellulose is resistant to microbial digestion, making it essential for plant strength. Furthermore, cellulose contributes to the storage of energy and nutrient transport, playing a vital role in overall plant health and growth. It is also an important factor in the plant's interaction with the environment.