There are several things that happen to a wilted plant when it is watered. The water will rehydrate the cells in the plants which are usually made up of water and this will revitalize the plant.
Nothing it just stays dead. HeHe
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'.
it grows Edited answer: If the plant has reached the stage of permanent wilting it will not respond, in case of temporary wilting the plant will recover on watering.
The plant cells are absorbing water and will become turgid again.
When a wilted plant is watered, osmosis occurs as water moves from the soil, where it is in higher concentration, into the plant's cells, which have a lower concentration of water. This process causes the plant's cells to swell, increasing turgor pressure and leading to the re-inflation of the plant's tissues. As a result, the wilting is alleviated, and the plant regains its upright posture and vitality.
It might come back to life, but it depends on the kind of plant.
it dies....
In a wilted plant- the wilted plant becomes firm again.
a wilted plant is a plant that has been drained out, that is, that it has no more moisture or water in them.
It takes in water by osmosis. This is why a wilted plant or even a wilted stalk of celery will become firm again if given water.
Loss of turgor typically happens when a plant is deprived of water, causing its cells to lose water pressure and wilt. This can occur during drought conditions or when a plant is not being adequately watered.
To revive wilted or unhealthy lavender, make sure it is planted in well-draining soil, receives adequate sunlight, and is watered sparingly. Trim back any dead or damaged parts of the plant and consider adding a layer of mulch around the base to retain moisture.