HORTICULTURE

Detailed explanation-1: -Initially, increasing temperature increases the rate of photosynthesis, as more energy is provided. Above a certain temperature (about 45 degrees Celsius), the enzymes involved in the reaction begin to denature and, consequently, the rate of the reaction begins to drop sharply until it stops altogether.

Detailed explanation-2: -What would you expect to happen to plants at a temperature greater than 45 degrees celsius? They will have a less than optimal rate of photosynthesis and it would probably cook. What is the Calvin cycle also called?

Detailed explanation-3: -As temperature increases the number of collisions increases, therefore the rate of photosynthesis increases. However, at high temperatures, enzymes are denatured and this will decrease the rate of photosynthesis.

Detailed explanation-4: -However, for photosynthesis at temperatures above 40°C the rate slows down. This is because the enzymes involved in the chemical reactions of photosynthesis are temperature sensitive and destroyed at higher temperatures.