A C4 plant exhibiting high stomatal conductance in response to elevated atmospheric CO2 experiences a sudden drop in CO2 levels. Which of the following is the MOST likely immediate consequence regarding the transpiration and photosynthesis compromise?
Increased transpiration and decreased photosynthetic rate
Decreased transpiration and increased photosynthetic rate
Decreased transpiration and decreased photosynthetic rate
No significant change in either transpiration or photosynthetic rate
Related Questions
Imagine a mutant plant with stomata that are less sensitive to abscisic acid (ABA). Under drought conditions, compared to a wild-type plant, this mutant would MOST likely exhibit:
Lower transpiration rate and higher photosynthetic rate
Higher transpiration rate and lower photosynthetic rate
Lower transpiration rate and lower photosynthetic rate
Higher transpiration rate and higher photosynthetic rate
The transpiration-photosynthesis compromise is most pronounced in which type of environment?
Cool and humid
Hot and humid
Hot and dry
Cool and dry
Which of the following best describes the transpiration and photosynthesis compromise?
Plants prioritize transpiration over photosynthesis in hot conditions.
Photosynthesis always takes precedence over transpiration.
Plants must balance the need to take in CO2 for photosynthesis with the risk of water loss through stomata.
Transpiration and photosynthesis are unrelated processes.
Under conditions of high temperature and low humidity, which factor MOST directly exacerbates the transpiration and photosynthesis compromise?
Decreased CO2 concentration
Increased vapor pressure deficit
Reduced soil water potential
Elevated atmospheric pressure
If a plant's stomata are completely closed, which process is directly affected?
Only transpiration
Only photosynthesis
Both transpiration and photosynthesis
Neither transpiration nor photosynthesis
What role do stomata play in the transpiration and photosynthesis compromise?
They only allow CO2 intake for photosynthesis.
They only facilitate water loss through transpiration.
They regulate the exchange of gases, including CO2 intake and water vapor release.
They have no role in either transpiration or photosynthesis.
In a CAM plant experiencing prolonged water stress, which adaptation is MOST likely to minimize the transpiration and photosynthesis compromise?
Increased stomatal density
Further temporal separation of CO2 uptake and fixation
Shifting from CAM to C4 photosynthesis
Reducing leaf surface area
A researcher observes that a plant species exhibits a lower transpiration rate and higher water use efficiency (WUE) under high light intensity compared to low light. Which physiological adaptation BEST explains this observation?
Increased leaf thickness
Deeper root system
Increased chlorophyll content
Partial stomatal closure
The transpiration and photosynthesis compromise is primarily a balance between:
Oxygen production and CO2 uptake
Sugar production and water uptake
CO2 uptake and water loss
Light absorption and sugar production
How does the boundary layer resistance affect the transpiration and photosynthesis compromise?
A thicker boundary layer increases transpiration and enhances CO2 diffusion.
A thicker boundary layer reduces transpiration but also limits CO2 diffusion to the leaf surface.
Boundary layer resistance has no impact on either transpiration or CO2 diffusion.
A thinner boundary layer reduces transpiration and limits CO2 diffusion.
