Which condition limits carboxylation efficiency by rubisco when stomata close during a drought?

💡 Explanation

When stomata close during drought, CO2 decreases and O2 increases inside the leaf, because the mechanism of photorespiration is favored by rubisco when CO2 levels are low. Therefore photorespiration reduces carbon fixation effciency, rather than ATP surplus, saturation, or chlorophyll loss which occur to separate stimuli.

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