Due to availability of less water, how does the plant cope up with lack of water in desert conditions?

Due to availability of less water, how does the plant cope up with lac

1.	Due to availability of less water, how does the plant cope up with lack of water in desert conditions?
Answer» Desert plants or xerophytic plants are adapted to desert conditions as they have modified leaves and modified stems. Their leaves are modified into spines, which reduces transpiration to almost nil. The stem is modified into succulent stems, which appear as broad leaf. These modified stems have stomata but they remain closed during day time to reduce transpiration. At night, these stomata opens and takes CO2 in. Other things required for photosynthesis like H2O absorbed through out day and night and chlorophyll is already present. Since they take CO2 at night, half of photosynthesis process takes place at night thus forming an intermediate sugar product which are stored in chloroplast and next day, in presence of sunlight, that intermediate product changes to starch, thus completing the photosynthesis (CAM pathway).