CAM (Crassulacean Acid Metabolism) plants are adapted to arid environments and use this unique photosynthetic pathway to conserve water. Here's how it works:
1. Nighttime CO2 uptake: CAM plants open their stomata (pores) at night when the air is cooler and humidity is higher. They absorb carbon dioxide and convert it into a special compound called malic acid, which is stored in their vacuoles.
2. Daytime photosynthesis: During the day, when the stomata are closed to prevent water loss, CAM plants use the stored malic acid as a source of carbon dioxide for photosynthesis.
This process allows CAM plants to carry out photosynthesis without losing significant amounts of water through transpiration.
Examples of CAM plants:
* Cacti
* Succulents
* Pineapples
* Orchids
* Sedums
By separating carbon dioxide uptake and photosynthesis, CAM plants can thrive in environments where water is scarce.
