Temperature

• If the temperature is between 25 and 30 degrees, with enough water, carbon dioxide, and light the rate of photosynthesis will increase with the temperature.
• If the temperature goes above 30 degrees, for most plants, the growth rate may reduce because of photorespiration: this refers to when oxygen competes with carbon dioxide for RuBisCo's active site. This will reduce the amount of carbon dioxide being accepted by RuBP and subsequently reduce the quantity of GP and TP being produced. Initially this will cause an accumulation of RuBP- RuBP cannot be generated as a lack of TP is present.
• If temperatures go above 45 degrees, enzymes involved in photosynthesis will denature. This reduces the rate of photosynthesis as enzymes are denatured. Eventually, the concentrations of GP and TP will decrease and so will RuBP because a lack of TP will not allow RuBP to regenerate.