Which mechanism slows photosynthesis when guard cell turgor decreases in plant leaves?

💡 Explanation

When guard cell turgor decreases due to dehydration, the stomata close because the cell wall tension decreases which reduces CO2 diffusion into the leaf. Therefore reduced CO2 intake slows photosynthesis, rather than increasing the rate as elevated chlorophyll or RuBisCO production would facilitate.

• Which event increases when oceanic seabirds fail olfactory imprinting?
• Which risk increases when a honeybee colony's pollen stores decline and only older bees perform the waggle dance?
• Which outcome impairs arousal from torpor despite sufficient hypothalamic triggers?
• Which outcome occurs when homing pigeons face impaired sense?
• Which homeostatic imbalance occurs if a freshwater fish's gill chloride cells fail?
• Which outcome occurs when high humidity increases boundary layer thickness in C4 plants?