Which outcome often occurs throughout drought conditions due to ABA?

💡 Explanation

The abscisic acid (ABA) causes stomatal closure in response to water stress, because this helps limit transpiration by reducing water vapor released from leaves; therefore photosynthetic rate often reduces due to the CO2 limitation internally, rather than enhanced rates of nutrient and water acquisition.

• Which risk increases when persistent drought limits water availability in C4 plants?
• Which risk increases when aquatic plants rely solely on CO2 assimilation via photorespiration?
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