The tissue that provides tensile strength to plants is called the collenchyma tissue.

Collenchyma tissue is a type of simple permanent tissue that provides mechanical support to the plant. It is found in the young stems and leaves of plants, usually just below the epidermis. This tissue is composed of living cells with thickened cell walls, which are irregularly thickened at the corners.

Structure of Collenchyma Tissue:
- Collenchyma cells are elongated and have a primary cell wall that is unevenly thickened.
- The cell corners are thickened due to the deposition of cellulose, hemicellulose, and pectin.
- The thickening of the cell walls provides strength and flexibility to the tissue.

Functions of Collenchyma Tissue:
1. Mechanical Support: The primary function of collenchyma tissue is to provide tensile strength and support to the plant. The thickened cell walls prevent the plant from collapsing under its own weight, especially in young, growing regions.

2. Flexibility: The irregular thickening of the cell walls allows for flexibility, enabling the plant to bend without breaking. This is particularly important in regions exposed to wind or other external forces.

3. Protection: Collenchyma tissue also provides protection to delicate and vulnerable plant organs. For example, in the petioles of leaves, collenchyma tissue forms a sheath around the vascular bundles, offering support and protection.

4. Transport: Although collenchyma tissue is not directly involved in the transport of water, minerals, or food substances, it assists in the movement of substances within the plant. The elongated cells of collenchyma tissue create channels for the flow of water and solutes between different parts of the plant.

Examples of Collenchyma Tissue:
- In herbaceous plants, collenchyma tissue is commonly found just below the epidermis of young stems and petioles.
- It can also be present in the midrib region of leaves.

Conclusion:
Collenchyma tissue plays a crucial role in providing tensile strength, support, and flexibility to plants. Its presence in young and growing regions ensures that the plant can withstand external forces and maintain its structural integrity.