During intense heat stress, which outcome occurs when stomatal closure limits carbon dioxide?

💡 Explanation

Limited carbon dioxide due to stomatal closure favors photorespiration because Rubisco binds to O2 rather than CO2 when CO2 levels are low inside the leaves. This therefore leads to increased photorespiration, rather than efficient carboxylation by Rubisco.

• Which photosynthetic constraint increases when photorespiration rate rises proportionally to oxygen concentration?
• When environmental humidity decreases around a C3 plant, which specific mechanism initially reduces photosynthetic rate?
• Which outcome impairs bees' foraging success during dance communication?
• Which force precipitates leaf wilting when soil dries?
• Which risk profoundly increases when a plant adapts to drought by increased abscisic acid production affecting stomata?
• Which event follows when a tall tree transpires excessively during drought?