Transpiration and Translocation

In flowering plants, two tissue types are used for transporting substances, phloem and xylem. They form separate tubes that go to different parts of the plant, but both types of tissue are completely separate.

Transpiration is the process by which plants lose water vapour through small pores on their leaves called stomata. This water loss occurs due to evaporation and diffusion of water molecules from the leaves into the surrounding air. Transpiration is important for plants because it helps to maintain their internal water balance, allowing them to transport essential nutrients from the roots to the rest of the plant. High rates of transpiration can lead to wilting, while low rates can lead to water stress in plants.

Translocation, on the other hand, is the movement of nutrients and other substances within a plant from one location to another. This movement occurs through specialised tissues called phloem, which is responsible for transporting organic compounds, such as sugars and amino acids, from the leaves to other parts of the plant, such as the roots and flowers. Translocation is essential for plant growth and development because it allows nutrients to be distributed throughout the plant as needed.

In summary, transpiration is the loss of water vapour from plants through their leaves, while translocation is the movement of nutrients and other substances within a plant from one location to another through specialised tissues called phloem.

Phloem transports food

The phloem moves food substances that the plant has produced by photosynthesis to where they are needed for processes.