A plant perks up when given water because it uses water to make food for its self.
If the wilted plant is watered, the water always moves from a high amount of water to a lower amount. In this case, there is more water outside the plant than inside the plant. Water moves by diffusion but in this case we use a special term called osmosis. The plant will 'perk up'.
The reason plants wither is to protect it from water loss. When the plant is given an ample amount of water, the stem is able to stand back up.
The meaning of perk up is "to wake up, sleepy head".
This cayenne pepper ought to perk up that salad.
It all depends on the plant. You'll know you given your plant enough water when after watering your plant will not suck up any more and a small puddle appears on the soil still after waiting about a minute.
Water flows through a plant with the xylem when it collects water and the nutrients in a plant.
I'd set it out in the rain. A nice gentle rain will wash all the dust off the leaves and perk it up.
The water goes into the soil, some of the water touches the root hair, so the plant sucks up the water and while the plant sucks the water up. The water goes into the roots hair and ends up at the plant.
If water goes into the soil the plant sucks the water up, and gives the plant nutrients.
Because plants do not move, they need something to keep them from flapping around. They do not have bones because they do not need to endure so much interaction with their world. They have a cell wall because it also helps them to stay more firm and stay put so that if a wind blows, one part of the plant is in the soil and the other part is at a whole new block. Also because the plant cell is full of water, that is what makes the plant "Perky". When the plant needs water, the cells releases it, and that makes the cell walls less firm. The result it that there is not as much pressure on the wall of the cell and the plant droops. As soon as you water the plant, the cells will fill up, and the plant will perk up again.
Feeds the plant water from the root up
the plant roots move around in the soil and soak up the water. then the water travels through the plant.