Plant tissue cells with cellulose strips at the corners play an important role in storing starch and providing flexibility to young stems and leaves.

Storing Starch
- The elongated and thickened plant tissue cells, also known as collenchyma cells, have cellulose strips at the corners, which provide strength and support to the plant.
- These cells are found in the cortex and pericycle regions of the stem and root, where they are involved in storing starch.
- The cellulose strips in the cell walls provide rigidity and prevent the cells from collapsing under pressure.
- Starch, which is a complex carbohydrate, is synthesized in the leaves through photosynthesis and then transported to different parts of the plant for storage and energy reserves.
- The collenchyma cells with cellulose strips provide a structural framework for storing starch, ensuring that it is stored efficiently and can be easily accessed when needed by the plant.

Flexibility in Young Stems and Leaves
- The presence of cellulose strips in the collenchyma cells also allows for flexibility in young stems and leaves, preventing them from breaking under mechanical stress.
- As the plant grows, the young stems and leaves need to bend and flex in response to external factors such as wind or gravity.
- The elongated and thickened collenchyma cells provide strength and support, while the cellulose strips allow for flexibility and elasticity.
- When an external force is applied to the stem or leaf, the cellulose strips allow the collenchyma cells to stretch and deform without breaking.
- This flexibility is crucial for the survival of the plant, as it allows the plant to adapt to changing environmental conditions and withstand physical stress.
- Additionally, the cellulose strips also provide resistance against pathogens and pests, as they make it difficult for them to penetrate and damage the plant tissue.

In conclusion, the elongated and thickened plant tissue cells with cellulose strips at the corners are involved in storing starch and providing flexibility to young stems and leaves. These cells ensure efficient storage of starch and allow the plant to bend and flex without breaking, contributing to the overall growth and survival of the plant.