Introductory Crop Physiology

Mechanism of Photosynthesis

Mechanism

• The biosynthesis of glucose by the chloroplast of green plants using water and CO2 in the presence of light is called photosynthesis.
• Photosynthesis is a complex process of synthesis of organic food materials.
• It is a complicated oxidation- reduction process where water is oxidized and CO2 is reduced to carbohydrates.

The mechanism of photosynthesis consists of two parts.

1. Light reaction / Primary photochemical reaction / Hill’s reaction/ Arnon’s cycle
2. Dark reaction / Black man’s reaction / Path of carbon in photosynthesis.