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Nature & Animals

Which outcome occurs in CAM plants during the night due to temporal separation of pathways?

A)CO2 fixation via PEP carboxylase
B)Photorespiration exceeding photosynthesis
C)Rubisco directly fixing atmospheric CO2
D)Stomata fully open for gas exchange

💡 Explanation

During the night in CAM plants, CO2 fixation via PEP carboxylase occurs because stomata open at night to minimize water loss, allowing CO2 to be converted into a four-carbon acid. Therefore, CO2 fixation results, rather than photorespiration, Rubisco fixation due to daytime constraints or open stomata which exacerbate water loss.

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