How are cohesion and adhesion properties of water linked to photosynthesis
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Water molecules Cling to each other and stick to many surfaces
The cohesion and adhesion properties of water are directly linked to photosynthesis. Cohesion refers to the attraction between water molecules, while adhesion refers to the attraction between water molecules and other surfaces or substances.
In the context of photosynthesis, cohesion allows water molecules in the plant's transport system (xylem) to stick together, creating a continuous column of water that can be pulled upward against gravity. This process is known as capillary action. The cohesive forces between water molecules help to maintain this column of water, enabling it to move from the roots to the leaves of the plant.
Adhesion comes into play when water molecules adhere to the walls of the xylem vessels. As water is pulled upward, it adheres to the inner walls of the xylem, reducing the tension and preventing the collapse of the transport system. This allows water to be transported efficiently and reach the leaves of the plant, where photosynthesis occurs.
During photosynthesis, water is essential. Within the leaf, water molecules are broken down through a process called photolysis, releasing electrons, protons, and oxygen. The oxygen is then released as a byproduct, while the electrons and protons are used in the production of glucose and other organic molecules.
The cohesion and adhesion properties of water play a crucial role in this process. Cohesion ensures that water molecules are continuously available for photolysis, while adhesion helps in the movement of water through the plant's transport system and the delivery of water to the leaf cells where photosynthesis occurs. Without these properties of water, the efficient transportation of water and the subsequent process of photosynthesis would be severely hindered.