PHOTOSYNTHESIS
C 4 PHOTOSYNTHESIS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
to avoid water loss
|
|
|
to avoid oxygen loss
|
|
|
to replenish lost CO2
|
Detailed explanation-1: -Under drought, plants may also close their stomata to limit the amount of water that evaporates from their leaves. However, this strategy introduces new dilemmas. Because plants must exchange gases through their stomata, closing them prevents plants from taking up carbon dioxide (CO2).
Detailed explanation-2: -But when limited water is available in the soil, plants try to prevent water loss. Water loss through transpiration can be reduced by closing the stomata in the leaves using a substance called ABA. When the stomata is closed photosynthesis will decrease because no CO2 can enter through the closed stomata.
Detailed explanation-3: -Stomata are mouth-like cellular complexes at the epidermis that regulate gas transfer between plants and atmosphere. In leaves, they typically open during the day to favor CO2 diffusion when light is available for photosynthesis, and close at night to limit transpiration and save water.