Name the pores through which guttation …

Guttation is when a plant pushes water out through tips of the leaves of plants. These are special pores called hydathodes. 

Guttation is when water is secreted from the tips of the leaves of plants. Guttation happens in certain plants that have vascular systems, such as grass, wheat, barley, tomatoes, strawberries, and other small plants. Since guttation relies on pressure, it can't occur in large plants, such as trees, because the pressure required to force the water out is too large.

Guttation happens at night when the soil is very moist and the roots absorb water. If there is too much water, root pressure causes the water to squeeze out of the plant and onto the tips of the leaves or the blades of the plant. As water from soil passes through the guttation process, it picks up minerals, enzymes and other chemicals and is called xylem sap.