Why Does Overwatering a Plant Kill It

Question

Why does overwatering a plant kill it?
A) Water does not have all the necessary minerals a plant needs to grow.
B) Water neutralizes the pH of the soil.
C) The roots are deprived of oxygen.
D) Water supports the growth of root parasites.
E) Water lowers the water potential of the roots.

Accepted Answer

Overwatering can lead to waterlogged soil, which reduces the amount of oxygen available to the roots. This can cause root rot and ultimately kill the plant.

Answer: E
 Overwatering can also lower the water potential of the roots, making it difficult for them to absorb water and nutrients. This can lead to wilting and other signs of stress, and can eventually kill the plant.