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How does photosynthesis occur in desert plants ?

@Arjun: You may refer to the answers provided by your friends.

@others: Good work! Keep posting.

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there are a special group of plants (plants that live in desert climates) that have modified how and when they take up CO2at night.

In this special group of plants (called CAM plants) the CO2 enters the plant at night and is stored by the plant in special structures. This stored CO2 is then used for photosynthesis during the day but the plant takes in no new CO2 during daytime.
 

...The CAM plants do this so as to prevent water loss during the hot daytime hours. they have special function for it
 
As succulent stems can store water for a long period so these plants never deprived of water ....more over they have very low number of stomata which prevent the water lost and usually stomata are present at the lower epidermis thus the direct heat from the sun is averted......in these ways these plants can survive in dry conditions...
the plant will close their stoma to conserve water and they evolved to open their stomata and fix CO2 into organic compounds during the night when it is not so hot & then they close the stomata during the day
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Photosynthesis in desert plants

 
  • Cactus

Cacti depend on chlorophyll in the outer tissue of their skin and stems to conduct photosynthesis for the making of food. Spines protect the plant from animals, shade it from the sun and also collect moisture. Extensive shallow root systems are usually radial, allowing for the quick storage of large quantities of water when it rains. Because they store water in the core of both stems and roots, cacti are well-suited to dry climates and can survive years of drought on the water collected from a single rainfall.

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