1. Optimum temperature for C4 plants is 32-450C for photosynthesis.
2. C4 plants are capable of photosynthesis in the presence of small amounts of CO2.
3. C4 plant carbon-fixing enzymes are more efficient.
4. C4 plant carbon molecules readily participate in various metabolic processes.
5. No or very little photorespiration occurs in C4 plants.
6. C4 plants have chloroplasts around the bundlesheath so sugars can be transported easily.
7. Inhibition of photosynthesis in C4 plants is not obtained even when the oxygen content in the air is greater than 20%.