Plant cells use the central vacuole to provide support for their cell walls . When a plant becomes turgid , what is happing inside the cell ?

When the central vacuole of the plant cell is fully hydrated, the plant cell performs optimally. When filled with water, the swollen central vacuole exerts pressure on the rest of the cell's cytoplasm, which in turn exerts pressure on the cell wall itself. As a result, there is a lot of turgor pressure. Wilting occurs when turgor pressure is diminished in the plant.
A central vacuole, a kind of organelle that contains a lot of water, takes up most of this area. This organelle, which is surrounded by a single membrane, serves a variety of purposes, including reservoir, waste disposal, storage zone, and even a mechanism of maintaining the cell's form.
Upon the cessation of development, the cell wall no longer has to be extensible: in some cases, the primary cell wall is kept without considerable change; in other cases, a stiff, secondary cell wall is formed by depositing new layers between existing layers.

Step-by-step explanation

The plant cell operates best when its central vacuole is completely hydrated. The inflated central vacuole presses on the cytoplasm, which presses on the cell wall. As a consequence, turgor pressure is high. Wilting happens when the plant's turgor pressure drops.
This space is occupied by a central vacuole, a water-filled organelle. This single-membrane organelle acts as a reservoir, waste disposal, storage zone, and even a mechanism for regulating the cell's shape.
A rigid secondary cell wall is generated by depositing new layers between existing layers after the main cell wall has stopped extending.