Xerophytes, such as cacti, usually have special means of storing and conserving water. They often have few or no leaves, which reduces transpiration. Phreatophytes are plants that have adapted to arid environments by growing extremely long roots, allowing them to acquire moisture at or near the water table.
The plants that tend to live in the dry conditions have certain adaptations that can be used by them to survive there.
These plants are known as xerophytes, they lack pure leafy structure and the leaves are succulents in nature and have thorns on them to prevent the loss of water.
They have broad stem and leaves that stores water and performs the process of photosynthesis.
The stomata closes at times to prevent the loss of water through transpiration.
Answer: When the plant has enough water in its cells the guard cells swell up and open the stomata. When the plant isn't getting enough water the guard cells can't swell and the stomata stay closed, so the plant doen's lose water. But if the stomata are closed photosynthesis can't happen and eventually the plant might starve.
