Discuss the Crassulacean acid metabolism (CAM) and significance of CAM plants.

Crassulacean Acid Metabolism (CAM) is a unique photosynthetic adaptation found in certain plants, primarily in arid and semi-arid environments. CAM plants have evolved to overcome the challenges of water scarcity and high temperatures by altering their carbon fixation and metabolic processes. This physiological strategy is particularly common in succulent plants belonging to the Crassulaceae family, such as cacti and certain orchids.

### Mechanism of CAM:

CAM plants exhibit a temporal separation of the processes involved in photosynthesis, namely carbon dioxide (CO2) uptake and the Calvin cycle. Unlike typical C3 and C4 plants, CAM plants open their stomata at night to take in CO2. The absorbed CO2 is then stored in the form of organic acids, usually malic acid, in vacuoles within the plant cells. These organic acids serve as a carbon reservoir that _________ __________ ____ ___ ______ ___ __________ ____.
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