Question

why don't the leaves of these plants rot in water

Answer 1

At the point when osmosis happens in leaves, the cell divider makes a cutoff that is on account of the cell doesn't blast up and decay up.

The plant has root rot most likely in light of the fact that it had excessive water. At the point when the soil is excessively wet, there is no space for air between the grains of soil, and the roots really suffocate, which is root decay. Give your plant a chance to get entirely dry, and after that give simply enough water to keep the dirt soggy, yet not wet.