Question

What is optimum temp. For C3 and C4 cycle to function?

Answer 1

C3 and C4 cycle:

1. The majority of plants produce 3-carbon acid called 3-phosphoglyceric acid (PGA) as a first product during carbon dioxide fixation.
2. Such a pathway is known as the C3 pathway which is also called the Calvin cycle.
3. Every photosynthetic plant follows Calvin cycle, but in some plants, there is a primary stage to the Calvin Cycle known as C4 pathway.
4. Here, a 4-carbon compound called oxaloacetic acid (OAA) is the first product by carbon fixation. Such plants are special and have certain adaptations as well.

Optimum temperature for C3 and C4 cycle:

1. An optimum temperature is required for different types of photosynthesis to take place.
   
2. The C3 plants survive at a lower temperature conditions, while C4 plants survive at a higher range of temperatures​.
3. C3 plant requires an optimum temperature of ${18}^{o}C-{24}^{o}C$ .
4. C4 plant requires an optimum temperature of ${32}^{o}C-{55}^{o}C$ .