DENDROLOGY

TREE PHYSIOLOGY

PHOTOSYNTHESIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which factor affects photosynthesis the least?
A
light
B
water
C
carbon dioxide
D
oxygen
Explanation: 

Detailed explanation-1: -Plants absorb carbon dioxide from the atmosphere. However, because the amount of CO₂ . The air is so small, it acts as a limiting factor for photosynthesis.

Detailed explanation-2: -The wavelength of green light is thought to be the least efficient for photosynthesis. If the plants are exposed to green wavelengths during photosynthesis, the rate of photosynthesis will be the slowest. This is due to the presence of chlorophyll, a green pigment.

Detailed explanation-3: -Thus, low-oxygen environments decrease the utilisation of assimilates which then may lead to inhibition of photosynthesis. This content is only available as a PDF.

Detailed explanation-4: -Undoubtedly, therefore, oxygen in normal air exerts a strong inhibitory effect on photosynthetic Co2 fixation of land plants under natural conditions.

Detailed explanation-5: -The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature.

There is 1 question to complete.