In CAM plants,the source of CO_2 for photosyn | vedclass

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Question

(B) $CAM$ (Crassulacean Acid Metabolism) plants exhibit a unique adaptation to conserve water in arid environments.During the night,these plants open

Vedclass · Accepted Answer

Malic acid

Vedclass · Answer

(B) $CAM$ (Crassulacean Acid Metabolism) plants exhibit a unique adaptation to conserve water in arid environments.During the night,these plants open their stomata and fix $CO_2$ into organic acids,primarily malic acid,using the enzyme $PEP$ carboxylase.This malic acid is stored in the vacuoles of the cells.During the day,the stomata remain closed to prevent water loss.The stored malic acid is then transported out of the vacuole and decarboxylated to release $CO_2$ internally.This released $CO_2$ is then utilized by the Calvin cycle ($C_3$ cycle) for photosynthesis.Therefore,malic acid serves as the internal source of $CO_2$ during the day.

In $CAM$ plants,the source of $CO_2$ for photosynthesis during the day is . . . . . . .

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