what are ways plants can conserve water

2 answers

One way plants conserve water involves their ability to close the pores in their leaves. These pores, called stomata, react to chemical changes the plant senses, namely to the amount of calcium.

Guard cells surrounding the pores apparently respond to oscillations from calcium, and when these oscillations (or vibrations) do not occur at the correct frequency for the plants to keep their pores open, the guard cells instruct the cells to close, thereby keeping in water.
What are some ways which plant can conserve water?