Why does the process of photosynthesis slow down in high temperatures?

Answer 1

In C3 plants the process is called photorespiration. As the temperature rises C3 plants close down their stomata somewhat and less carbon dioxide enters the leaves. This causes oxygen levels to rise through continued photolysis and the enzyme rubisco starts fixing oxygen ( it accepts either CO2 or O2 into it's active site ) into Calvin cycle intermediates. ATP is not produced, but consumed and organic acids hold the carbon dioxide that would normally be fixed at the beginning of the Calvin cycle. So, photosynthesis is slowed. C4 and CAM plants get around this by adaptations, but this is another story and C3 plants are 90% of the terrestrial plant life.

Answer 2

High temperatures can denature the enzymes involved in photosynthesis, disrupting their ability to function properly. This can lead to a decrease in photosynthetic efficiency and a slowdown in the overall process. Additionally, high temperatures can cause plants to undergo stress responses, leading to a reduction in photosynthesis to protect themselves from damage.

Answer 3

because when the earth spins on its axis, the sun rays arent always hitting directly on us therefore photosynthesis doesnt work well without enough heat.

hope this helped!

Answer 4

well in fall its not sunny so it doesnt get the light it needs neither does it rain much in fall so it also doesnt get the it needs

Answer 5

because there is no sunlight and it is cold weather in night that's why they cannot

Answer 6

Remember that this driven by sunlight and there is less as we go into Fall and Winter.

Answer 7

Less sunlight.