Explain how soaked seeds swell up and burst their seed coats.
Explain how soaked seeds swell up and burst their seed coats.

Imbibition is the absorption of water by substances such as cellulose (cell wall) and starch.

Turgor pressure set within plant cells due to hydrostatic pressure on cell walls caused by water infiltration due to endosmosis.

Seeds become swollen when submerged in water due to imbibition and endosmosis.

The energy produced by the absorbed water is strong enough to cause the seed coats to explode. Therefore, the seeds soaked in water when stored in a fully sealed container are exposed to pressure.