Biology Project Effect of salt on seed germination Salt reduces a seed's ability to absorb water (osmotic stress) and causes an ion imbalance within the seed (ionic stress), ultimately inhibiting germination and preventing crop production. Low concentrations of salt might actually increase the germination rate however high concentrations of salt significantly decrease the rate of germination Experiment: No salt water 1 spoon salt water 2 spoon salt water 3 spoon salt water 4 spoon salt water The starting day of the seed germination after water is poured into each cup After 1 day of germination, there is no progress After 2 days After 3 days