Photosynthesis - The Process of Making Food in Plants
Nutrition is essential for the survival of organisms.
Plants are organisms which are capable of producing their own food with the help of sunlight and other raw materials.
Organisms which are capable of producing their own food are called 'autotrophs', so plants are autotrophs.
And the process by which plants produce their food is called photosynthesis.
Let us learn more about photosynthesis.
In photosynthesis, solar energy is captured by the chlorophyll present in leaves of the plants.
Along with sunlight, water and carbon dioxide are also essential for photosynthesis.
Since the food making process takes place in the leaves of the plants, the leaves are called the kitchen of the living world.
Let us study how the plants receive these raw materials.
The sunlight is directly absorbed by the plants in leaves.
The leaves have a green coloured pigment called chlorophyll, which helps in capturing energy from sunlight.
Water and minerals which are present in the soil are absorbed by the roots.
These are transported to leaves by pipe-like structures present in roots, stem and leaves. They are called vessels.
Carbon dioxide from the atmosphere is absorbed by the leaves through tiny pores called stomata. Stomata are present on the surface of leaves.
The stomatal opening (pore) is covered by two bean-shaped cells called guard cells.
Let us study about the process of photosynthesis.
During photosynthesis, the chlorophyll-containing cells in the leaves absorb sunlight and utilise the absorbed carbon dioxide and water to produce carbohydrates like starch.
Oxygen is released as a byproduct of this reaction.
This process can be represented as the given equation.
Usually plants store food in the form of starch, which is a carbohydrate.
Let us study the significance of photosynthesis.
Plants are the primary sources of food in the environment. In the absence of photosynthesis, there will not be any food available for other organisms.
Hence the survival of almost all living organisms directly or indirectly is dependent on plants.
Oxygen is essential for the survival of all organisms and it is produced during photosynthesis.
Because of all these reasons, life would be impossible on the Earth without photosynthesis.
Plants make their food by themselves by the process of photosynthesis.
Sunlight, water and carbon dioxide are required for photosynthesis. Plants absorb sunlight with the help of chlorophyll pigment present in the leaves.
The plants absorb water from the soil through the roots and carbon dioxide through stomata present in the leaves.
Photosynthesis is essential for the life on Earth as plants are the primary producers and all organisms directly or indirectly are dependent on plants for food.
Plants produce and store food in the form of carbohydrates. Oxygen, which is produced as a byproduct is released after photosynthesis.