What is transpiration in plants?

Transpiration in plants refers to the movement of water through the plant, primarily leading to its evaporation from small openings called stomata, primarily located on the leaves. This process is crucial for several reasons. As water evaporates from the stomata, it creates a negative pressure within the plant that helps draw more water up from the roots through the xylem vessels. This movement of water is vital for nutrient transport, maintaining plant structure, and temperature regulation.

Moreover, transpiration plays a significant role in the water cycle, contributing to the overall atmospheric moisture. It is a key factor in photosynthesis as well, since it aids in the uptake of carbon dioxide through stomata, but it is not the same process. Therefore, understanding transpiration is essential as it underscores the interdependence of water movement and gas exchange in plant physiology.