Nutrition in plants
NUTRITION IN PLANTS
Plants play role of producers in nature. are producers, which produce food for all living organic. They utilize sun’s radiant energy & convert into chemical energy. In this way, they also plays role of converter. Plants use sunlight in photosynthesis. During photosynthesis in the presence of sunlight CO2 & H2O convert in to carbohydrate & O2 molecules.
MECHANISM OF PHOTOSYNTHESIS
- Steps of photosynthesis :
- Chlorophyll traps the sunlight.
- CO2 & water molecule used as raw material.
- Now the chlorophyll convert the raw material into carbohydrate.
- Oxygen is generated as a by product in this process.
REQUIREMENT OF PHOTOSYNTHESIS
Green plants need the following things to prepare their own food :
- Carbon Dioxide : Plants take up carbon dioxide from the atmospheric air through stomata present on the undersurface of the leaves. Guard cells around stomata regulate their opening and closing.
- Chlorophyll : It is the green pigment presents in the leaf. The green colour of leaves is due to the presence of chlorophyll. It is usually present in special cell organelle called chloroplast. Chlorophyll captures solar energy during photosynthesis.
- Sunlight : Sunlight comes from the sun. It is essential as it provides the energy required for the reaction.
- Water and Minerals : Roots of the plants absorb water along with minerals from the soil and transport them to the leaves for photosynthesis.
SITE OF PHOTOSYNTHESIS
Photosynthesis occurs in the chlorophyll of leaves & sometimes in the stem which are green in colour.
Importance of photosynthesis :
- It is primary source of food production for all other living organisms.
- It maintain balance oxygen & CO2 in the atmosphere.
NUTRITION IN NON GREEN PLANTS
Non green plants like bacteria & fungi do not contain chlorophyll. So they cannot prepare their food by photosynthesis. These types of plants are heterotrophic plants.