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← Nature & AnimalsWhich outcome minimizes photorespiration under high-temperature stress in C4 plants reliant on rubisco?
A)Spatial separation of carbon fixation✓
B)Increased rubisco oxygenase activity
C)Elevated stomatal closure frequency
D)Decreased mesophyll cell surface area
💡 Explanation
When C4 plants experience high temperatures, photorespiration is minimized via spatial separation of initial CO2 fixation in mesophyll cells and rubisco-dependent carbon fixation in bundle sheath cells, allowing CO2 concentration. Therefore, spatial separation results, minimizing oxygenase activity, avoiding stomatal closure consequences, and not impacting cellular surface area.
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