Which risk profoundly increases when a plant adapts to drought by increased abscisic acid production affecting stomata?

💡 Explanation

When water is scarce, increased abscisic acid promotes stomatal closure to minimize water loss through transpiration, thereby limiting CO2 intake for photosynthesis and therefore decreasing leaf’s photosynthetic efficiency. Therefore reduction in photosynthetic rate results, rather than diseases, depletion, or herbivory which have different environmental and biochemical causes.

• Which outcome results when a tree's root loses aquaporin channel function?
• Which consequence results when vascular plants exceed transpiration capacity?
• Which outcome ensures healthy wetland plant growth when perpetually waterlogged?
• Which photosynthetic inefficiency results when elevated leaf oxygen concentrations competitively inhibit rubisco carboxylation?
• Which outcome prevents complete metamorphosis during pupal ecdysis?
• Which outcome occurs when countershading camouflage fails in orcas?