What different roles do the polysaccharides starch and cellulose play in plan systems?

Starch and cellulose serve distinct roles in plant systems. Starch acts as a storage polysaccharide, providing energy reserves for plants in the form of glucose units that can be mobilized when needed. In contrast, cellulose is a structural polysaccharide, forming the primary component of plant cell walls, which contributes to the rigidity and strength of plant tissues. Together, they support the plant's metabolic needs and structural integrity.