Nutrition in Plants

Plants are autotrophic organisms that produce their food by photosynthesis. They use light energy to convert carbon dioxide and water into glucose and oxygen. The process of photosynthesis takes place in the chloroplasts of the plant cells.

Types of Nutrition in Plants

1. Autotrophic Nutrition - Plants that produce their food by themselves are called autotrophs. They use inorganic substances like carbon dioxide, water, and minerals to produce their food. This type of nutrition is known as autotrophic nutrition.

2. Heterotrophic Nutrition - Plants that cannot produce their food by themselves depend on other organisms for their food. This type of nutrition is called heterotrophic nutrition.

Mode of Nutrition in Plants

1. Photosynthesis - The process of photosynthesis takes place in the chloroplasts of the plant cells. Chlorophyll is the pigment that helps in capturing sunlight. The energy from sunlight is used to convert carbon dioxide and water into glucose and oxygen.

2. Parasitic Nutrition - Parasitic plants depend on other plants for their food. They attach themselves to the host plant and take nutrients from it. Example: Cuscuta.

3. Saprophytic Nutrition - Saprophytic plants feed on dead and decaying matter. They absorb nutrients from the dead matter. Example: Fungi.

Factors Affecting Photosynthesis

1. Light - The rate of photosynthesis increases with an increase in light intensity. However, too much light can damage the chloroplasts.

2. Carbon Dioxide - Carbon dioxide is an essential component for photosynthesis. An increase in carbon dioxide concentration increases the rate of photosynthesis.

3. Temperature - The rate of photosynthesis increases with an increase in temperature up to a certain limit. However, high temperatures can damage the enzymes involved in photosynthesis.

In conclusion, plants use different modes of nutrition for their survival. Autotrophic nutrition is the main mode of nutrition in plants. Photosynthesis is the process by which plants produce their food. The rate of photosynthesis is affected by various factors like light, carbon dioxide, and temperature.