Nutrient obtained from air by plants: Oxygen

Oxygen is the nutrient obtained from air by plants. It is an essential element required by plants for their survival and growth. Let's understand in detail how plants obtain oxygen from the air and its importance.

Process of obtaining oxygen:
1. Photosynthesis: Plants have specialized structures called stomata on the surface of their leaves. These stomata allow the exchange of gases between the plant and the atmosphere. During the process of photosynthesis, plants take in carbon dioxide from the air through the stomata and release oxygen as a byproduct.

Importance of oxygen for plants:
1. Respiration: Just like animals, plants also undergo respiration to produce energy. Oxygen is required for the breakdown of glucose in the plant cells to release energy. This energy is utilized for various metabolic activities of the plant, such as growth, reproduction, and nutrient absorption.

2. Aerobic respiration: In addition to glucose breakdown, plants also undergo aerobic respiration, which requires oxygen. During aerobic respiration, plants break down glucose completely to release a large amount of energy. This process occurs in the mitochondria of plant cells.

3. Transport of nutrients: Oxygen is involved in the transport of nutrients within the plant. It helps in the breakdown and absorption of minerals and water by the roots. Oxygen also plays a crucial role in the movement of nutrients from the roots to other parts of the plant through the xylem and phloem.

4. Protection against diseases: Oxygen plays a role in plant defense mechanisms against pathogens. During pathogen attack, plants produce reactive oxygen species (ROS) as a defense response. These ROS molecules help in destroying the invading pathogens and protect the plant from diseases.

In conclusion, oxygen is a vital nutrient obtained by plants from the air. It is essential for various plant processes, including respiration, energy production, nutrient transport, and defense against diseases. Without oxygen, plants would not be able to survive and carry out their metabolic activities.