Which outcome sharply reduces resource use inside water-stressed CAM plants?

💡 Explanation

Malate decarboxylation produces CO₂ locally only during light-dependent reactions because this recycling minimizes wasteful photorespiration. Therefore, water use and CO₂ need decreases, rather than altering diffusion through open stomata.

• Which consequence results when elevated CO₂ causes decreased stomatal conductance in C4 grasses?
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